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Nutritional characteristics and in vitro digestibility of silages from different corn cultivars harvested at two cutting heights; Características nutricionais e digestibilidade in vitro de silagens de diferentes cultivares de milho colhidos em duas alturas de corte

Caetano, Hamilton; Oliveira, Mauro Dal Secco; Freitas Júnior, José Esler; Rêgo, Aníbal Coutinho; Carvalho, Marina Vieira; Rennó, Francisco Palma
Fonte: Sociedade Brasileira de Zootecnia Publicador: Sociedade Brasileira de Zootecnia
Tipo: Artigo de Revista Científica
Português
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The objective of this study was to evaluate the nutritional traits and in vitro digestibility of silages from different corn cultivars harvested at two cutting heights. It was evaluated 11 cultivars (Dina 766, Dina 657, Dina 1000, P 3021, P 3041, C 805, C 333, AG 5011, FO 01, Dina co 9621 and BR 205) harvest 5 cm above ground (low) and 5 cm below the intersection of the first ear (high). It was used a random block design (three blocks), arranged in a 11 × 2 factorial scheme. Silages from plants harvested at high cutting height presented average content of dry matter significantly superior to silages from plants harvested at low height. Cultivars FO 01, AG 5011, Dina co 9621 and Dina 766 presented greater content of crude protein than cultivars C 805, P 3041 and P 3021, which presented the lowest contents of this nutrient. The raise in the cut height increased in vitro dry matter true digestibility coefficients and in vitro dry matter digestibility of silage evaluated. The increase in cut height improved nutritive value of silages by decreasing concentrations of fibrous fractions and increasing in vitro dry matter digestibility.; Objetivou-se neste estudo avaliar as características nutricionais e a digestibilidade in vitro de silagens de diferentes cultivares de milho colhidas em duas alturas de corte. Foram avaliadas 11 cultivares (Dina 766...

Isoflavones and antioxidant capacity of Peruvian and Brazilian lupin cultivars

RANILLA, Lena Galvez; GENOVESE, Maria Ines; LAJOLO, Franco Maria
Fonte: ACADEMIC PRESS INC ELSEVIER SCIENCE Publicador: ACADEMIC PRESS INC ELSEVIER SCIENCE
Tipo: Artigo de Revista Científica
Português
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Seed coats, cotyledons and hypocotyls from six Peruvian (Lupinus mutabilis Sweet) and two Brazilian (Lupinus albus and Lupinus angustifolius) lupin cultivars were assessed regarding their content of isoflavones and antioxidant capacity. Genistein and a genistein derivative were detected in seed coats and cotyledons from Peruvian cultivars. Total isoflavones ranged from 9.8 to 87, 16.1 to 30.8 and 1.3 to 6.1 mg/100 g of sample in fresh weight (expressed as genistein) in seed coat, cotyledon and hypocotyl fractions, respectively, from mutabilis species, whereas no isoflavones were detected in L. angustifolius and L. albus. A significant correlation (r = 0.99) was found between the total isoflavone levels and the antioxidant capacity measured by the 2,2-diphenyl-1-picrylhydrazyl radical-scavenging method in all fractions of Peruvian samples. No condensed tannins were detected in any of the lupin cultivars. The H-6 Andean cultivar is promising for its high isoflavone content and antioxidant capacity. Insights from this study indicate that lupin cultivars of the mutabilis species have similar isoflavone profiles and that isoflavones are more concentrated in the cotyledon seed fraction than in the seed coat or hypocotyl fractions. (C) 2008 Elsevier Inc. All rights reserved.

Manejo de cultivares de algodoeiro em densidade populacional variável com o uso de regulador de crescimento.; Management of cotton cultivars under variable plant densities using a plant growth regulator.

Zanon, Graciela Decian
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 28/11/2002 Português
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Com o objetivo de estudar o comportamento fenológico, morfológico e produtivo de cultivares de algodoeiro com diferentes arquiteturas de plantas em diferentes espaçamentos, através do manejo com regulador de crescimento, foi realizado o presente trabalho, na área experimental da ESALQ/USP, no município de Piracicaba, Estado de São Paulo, no ano agrícola de 2000/01. O delineamento experimental utilizado foi o de blocos ao acaso com parcelas sub-subdivididas e 4 repetições. As parcelas constituíram-se dos espaçamentos de 0,76 e 1,01 m, as subparcelas das três cultivares (IAC 23, DeltaOpal e CD 401) e as sub-subparcelas em presença ou ausência de regulador de crescimento. Em seis plantas marcadas de cada parcela foram analisados os seguintes parâmetros: acompanhamento das fases fenológicas (emergência, aparecimento do primeiro botão floral, antese da primeira flor e abertura do primeiro capulho) e caracteres agronômicos de campo (altura de planta, diâmetro do caule, número de ramos vegetativos e frutíferos, conformação da planta, número de capulhos por planta e altura de inserção do primeiro ramo frutífero). Na área útil de cada parcela foi determinada, a produção de algodão em caroço por hectare e a precocidade de colheita. Em amostras de 20 capulhos tomadas aleatoriamente em cada parcela foram realizadas as análises dos caracteres agronômicos de laboratório (massa de 100 sementes...

Nutritional characteristics and in vitro digestibility of silages from different corn cultivars harvested at two cutting heights

Caetano, Hamilton; Oliveira, M.D.S.; Freitas Júnior, J.E.; Rêgo, A.C.; Carvalho, M.V.; Rennó, F.P.
Fonte: Sociedade Brasileira de Zootecnia Publicador: Sociedade Brasileira de Zootecnia
Tipo: Artigo de Revista Científica Formato: 708-714
Português
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Objetivou-se neste estudo avaliar as características nutricionais e a digestibilidade in vitro de silagens de diferentes cultivares de milho colhidas em duas alturas de corte. Foram avaliadas 11 cultivares (Dina 766, Dina 657, Dina 1000, P 3021, P 3041, C 805, C 333, AG 5011, FO 01, Dina co 9621 e BR 205) colhidas 5 cm acima do solo (baixa) e 5 cm abaixo da inserção da primeira espiga (alta). O experimento foi delineado em blocos casualizados (três blocos), arranjados em esquema fatorial 11 × 2. As silagens das plantas colhidas na altura de corte alta apresentaram teor médio de matéria seca significativamente superior às silagens das plantas colhidas na altura de corte baixa. As cultivares FO 01, AG 5011, Dina co 9621 e Dina 766 apresentaram maior teor de proteína bruta, que as cultivares C 805, P 3041 e P 3021, as quais apresentaram os menores teores deste nutriente. A elevação da altura de corte aumentou os coeficientes de digestibilidade verdadeira in vitro da matéria seca e digestibilidade in vitro da matéria seca das silagens avaliadas. O aumento da altura de corte melhorou o valor nutritivo das silagens, diminuindo as concentrações das frações fibrosas e aumentando a digestibilidade in vitro da matéria seca.; The objective of this study was to evaluate the nutritional traits and in vitro digestibility of silages from different corn cultivars harvested at two cutting heights. It was evaluated 11 cultivars (Dina 766...

Upland rice growth and mineral nutrition as affected by cultivars and sulfur availability

Crusciol, Carlos Alexandre Costa; Nascente, Adriano Stephan; Soratto, Rogério Peres; Rosolem, Ciro Antonio
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Artigo de Revista Científica Formato: 328-335
Português
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A better understanding of the differential growth of upland rice (Oryza sativa L.) cultivars with increasing soil S availability could help improve rice yield under upland conditions. The objective of this study was to evaluate root and shoot growth and nutrition of upland traditional and modern rice cultivars as affected by S availability. The experimental design was completely randomized in a 3 (rates of S) × 3 (cultivars) factorial with four replications. Low availability of S in the soil reduces root and shoot development and the efficiency of N, P, and S uptake, as well as the concentration and content of these nutrients in rice cultivars. At 0 mg dm-3 of S, rice cultivars prioritize root growth over shoots, and the traditional cultivar does so with greater intensity. Our results suggested that more development of traditional cultivars under low S availability facilitates its adaptation in soils under this condition. On the other hand, the intermediate and modern cultivars are more responsive to S fertilization. Moreover, S fertilization allows significant increases in upland rice growth and must be considered in cropping systems aiming for high yields. © Soil Science Society of America.

Study of the volatile and glycosidically bound compounds of minority Vitis vinifera red cultivars from NW Spain

Canosa, P.; Oliveira, J. M.; Masa, A.; Vilanova, Mar
Fonte: Institute & Guild of Brewing Publicador: Institute & Guild of Brewing
Tipo: Artigo de Revista Científica
Publicado em //2012 Português
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Aroma composition was analyzed in grape musts from five Vitis vinifera red cultivars (Pedral, Sousón, Caíño Redondo, Espadeiro and Mencía) grown in Galicia (NW Spain) with the aim to know the potential profile of these varieties. All cultivars were collected from Coto Redondo Winery vineyard (A.O.C. Rías Baixas) and grown under the same conditions. All cultivars (with a total of 96 aroma compounds, 35 free volatile and 61 glycosidically bound compounds) were identified and quantified by GC-MS. The results showed that Caíño Redondo and Pedral had the highest concentrations of volatile compounds. The free fraction showed the highest concentration for all cultivars studied with the exception of Pedral. High concentrations of free C6-compounds and free alcohols were found for all red cultivars studied, especially for Caíño Redondo. Sousón and Mencía presented similar characteristics in the free fraction. Pedral showed an important contribution of glycosidically bound compounds. This cultivar showed the highest concentration of bound alcohols, terpenoids, volatile phenols, and C13-norisoprenoids. With terpenoids, higher levels were found in the bound fraction than in the free fraction. Regarding C13-norisoprenoids, Pedral also showed an important contribution of these varietal compounds. The principal component analysis (PCA) showed a good separation of the different grape cultivars...

Contribution for the characterization of carolino rice cultivars

Santos, Tania; Lemos, Diogo; Guiné, Raquel; Correia, Paula
Fonte: Instituto Politécnico de Viseu Publicador: Instituto Politécnico de Viseu
Tipo: Conferência ou Objeto de Conferência
Publicado em //2013 Português
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The objective of this work was to evaluate the grain biometric characteristics of 62 rice cultivars, which cover Indica and Japonica subspecies, and different types of commercial rice like, Agulha (Indica rice cultivars), Carolino (Japonica cultivars), aromatic (basmati and thai), integral rice, risotto, glutinous (waxy), wild and parboiled rice. It was noticed that for the same group type of rice there are a great variance. Generally, the Agulha, Aromatic and Integral rices commercialized in Portuguese trade are long (length high than 6 mm and length/width ratio higher than 3) and risotto cultivars are medium size. The two studied glutinous rice cultivars presented one cultivar long and other cultivar round (length lower than 5 mm and length/width ratio lower than 1.9). All rice cultivars presented high values of white vitreous, total whiteness, and low percentage of chalky area, presenting a crystalline and translucent aspect, but there is an exception to integral rice cultivars due to absence of polish operation during the milling process and for parboiled rice cultivars due to the effects of parboiled treatment. Moreover the vitreous percentage was also high. There was a strong correlation between the white vitreous values and total whiteness.

Evaluation of fruit and seed diversity and characterization of carob (Ceratonia siliqua L.) cultivars in Algarve region

Osório, Júlio; Barracosa, Paulo; Cravador, A.
Fonte: Universidade do Algarve Publicador: Universidade do Algarve
Tipo: Artigo de Revista Científica
Publicado em //2007 Português
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The genetic diversity of 15 carob ( Ceratonia siliqua L.) cultivars located in an experimental field from Algarve (Portugal) was evaluated over 7 years using 12 fruit and seed phenotypic characters, in order to characterize carob cultivars. The values of morphological traits obtained by cultiv ar were compared with those from other countries of the Mediterranean basin. Statistically significant differences were found between cultivars for al l characters which were examined, what indicates a high genetic diversity. The relationship among these characters was analyzed by principal component analysis (PCA) resulting in the separation of these cultivars classed in four groups (clusters I–IV) and in four ungrouped cultivars. A three dimension of the model was found to be significant and explained 74.5% of the total variation, in which the first component accounting for 34.6% of the total variation is dominated by fruit characters, while the second component is dominated by seed characters. Cultivars plotted on the left-lower quadrant on the space determined by principal components 1 and 2 are characterized by fruits with high seed yield more appropriated for industrial rentability. The correlation analyses established by cultivar provided a specific understanding about the way how fruit and seed characteristics correlate within each cultivar. This approach can be useful for the development of a breeding programme...

Polymorphic microsatellites of analysis in cultivars of taro

Nunes,Raquel SC; Pinhati,Fernanda R; Golinelli,Luciana P; Rebouças,Tiyoko Nair H; Paschoalin,Vânia Margaret F; Silva,Joab T da
Fonte: Associação Brasileira de Horticultura Publicador: Associação Brasileira de Horticultura
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2012 Português
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Taro (Colocasia esculenta) is a tuberous plant belonging to the Araceae family whose tuber is the 14th most consumed food crop in the world. Characterized as an unconventional vegetable, taro is grown in Brazil as a subsistence crop, but in recent years began to gain commercial importance, especially in the states of Espirito Santo, Minas Gerais and Rio de Janeiro. To avoid loss of genetic diversity of the local varieties traditionally grown in Brazil a core collection for taro germplasm has been developed by the Instituto Capixaba de Pesquisa, Assistência Técnica e Extensão Rural do estado do Espirito Santo (Incaper). The aim of this study was to perform a molecular characterization of the seven regional core collections. Genetic diversity of the cultivars was investigated by using SSR (Simple Sequence Repeats) polymorphisms, in seven loci (Xuqtem55, Xuqtem73, Xuqtem84, Xuqtem88, Xuqtem91, Xuqtem97 and Xuqtem110). Genetic diversity of the cultivars, based on the seven microsatellite alleles, was evaluated by using the software GelCompar II, showed that the loci Xuqtem73, Xuqtem88 and Xuqtem110 were the most informative, featuring 7, 10 and 8 alleles, respectively, a percentage of cultivars with polymorphic alleles of 85, 57 and 100% and identical PIC of 0.91. Based on Xuqtem110 locus analysis...

Efficiency of maize cultivars for zinc uptake and use

Furlani,Ângela Maria Cangiani; Furlani,Pedro Roberto; Meda,Anderson Rotter; Duarte,Aildson Pereira
Fonte: São Paulo - Escola Superior de Agricultura "Luiz de Queiroz" Publicador: São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2005 Português
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Zinc deficiency usually occurs in maize grown in Brazilian acidic soils. The aim of this study was to evaluate commercial maize cultivars for their Zn uptake and utilization efficiency. A greenhouse experiment using nutrient solution with young plants was carried out at Campinas, State of São Paulo, Brazil, in 2002. Treatments consisted of: 0.0; 0.1; 0.2; 0.4 and 0.8 mg L-1 Zn in the main plots and 24 commercial maize cultivars in the subplots, in a randomized complete block design. Zn concentration in shoot dry matter (SDM) ranged from 28.4 to 41.6 mg kg-1 among cultivars, clearly indicating a dilution effect, since a negative relation between SDM and plant height was shown. Total Zn-shoot content was a good parameter to discriminate cultivars, once correlated with plant height and SDM (r = 0.66** and r = 0.67**, respectively). Analysis of variance and polynomial regression for total Zn-shoot content was highly significant among cultivars and for the interaction cultivar vs Zn-concentration. Plants under low Zn presented up to three-fold differences among efficiency index values (E.I. = 8.59 to 26.42 mg² DM mug-1 Zn). The results with young plants indicated six maize cultivars classified as Zn-efficient and responsive (AG 7575, Tork...

Characterization of Brazilian soybean cultivars using microsatellite markers

Priolli,Regina Helena Geribello; Mendes-Junior,Celso Teixeira; Arantes,Neylson Eustáquio; Contel,Eucleia Primo Betioli
Fonte: Sociedade Brasileira de Genética Publicador: Sociedade Brasileira de Genética
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2002 Português
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Microsatellite markers or SSR (Simple Sequence Repeats) have proved to be an excellent tool for cultivar identification, pedigree analysis and the evaluation of genetic distance among organisms. Soybean cultivars have been characterized mainly by morphological and biochemical traits. However, these traits have not been sufficient to characterize the large number of cultivars eligible to receive protection under the Brazilian Cultivar Protection Act. In order to define new soybean cultivar markers, the alleles of twelve SSR loci of 186 Brazilian soybean cultivars were studied by estimating the variation in their size range and their respective frequencies. On average, 5.3 alleles per locus were detected, with a mean genetic diversity of 0.64 ± 0.12. These loci were used to distinguish morphologically similar groups, presenting a mean similarity coefficient of 0.46; their use allowed to determine 184 profiles for the 186 cultivars. A dendrogram based on the SSR loci profiles showed good agreement with the cultivar pedigree information.

Effect of harvest period on the quality of storage roots and protein content of the leaves in five cassava cultivars (Manihot esculenta, Crantz)

Sagrilo,Edvaldo; Vidigal Filho,Pedro Soares; Pequeno,Manoel Genildo; Scapim,Carlos Alberto; Vidigal,Maria Celeste Gonçalves; Diniz,Sérgio Paulo Severo de Souza; Modesto,Elisa Cristina; Kvitschal,Marcus Vinícius
Fonte: Instituto de Tecnologia do Paraná - Tecpar Publicador: Instituto de Tecnologia do Paraná - Tecpar
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2003 Português
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The effect of harvest period on the quality of storage roots and leaves of cassava cultivars was determined in an experiment carried out in a randomized complete block design with four replications in a split plot scheme, with five cultivars in the plots and ten harvest times in the subplots. The IAC 13 cultivar had the highest rate of dry matter accumulation in the storage roots and the Mico cultivar the lowest. The period of least dry matter content in the storage roots occurred later for the Fécula Branca, Mico and IAC 14 cultivars, and the minimum starch content in the storage roots occurred later for the Fécula Branca and Mico cultivars. In general, the IAC 13, IAC 14 and Fécula Branca cultivars had higher dry matter content in the storage roots, while higher starch content in the dry and fresh matter were obtained in the Fécula Branca cultivar. The crude protein content in the leaves decreased as the plant aged.

Analysis of Diterpens in Green and Roasted Coffee of Coffea arabica Cultivars Growing in the Same Edapho-Climatic Conditions.

KITZBERGER, C. S. G.; SCHOLZ, M. B. S.; PEREIRA, L. F. P.; SERA, T.; SILVA, J. B. G. D.; BENASSI, M. T.
Fonte: In: INTERNATIONAL CONFERENCE OF COFFEE SCIENCE, 23., 2010, Bali. Proceedings... Publicador: In: INTERNATIONAL CONFERENCE OF COFFEE SCIENCE, 23., 2010, Bali. Proceedings...
Tipo: Artigo em anais de congresso (ALICE)
Português
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Lipids are important components of coffee beverage flavor and aroma. Coffee oil is rich in diterpens of the kaurane family, mainly cafestol (C20H28O3) and kahweol (C20H26O3), which have increasingly received attention in recent years due to their physiological effects in human health. However, few studies have been conducted on the effects of the genetic variability for those lipids in Coffea arabica. In this work we initiate the characterization of cafestol and kahweol in different cultivars of Coffea arabica, growing in the same edaphoclimatic conditions. Mature coffee fruits from cultivars Catuaí, Icatu and three Catucaí derived the cultivars IPR 100, IPR 102 and IPR 106. They were harvested at the Agricultural Field Station of the Coop COCARI, Mandaguari, Paraná, Brazil, from May to July 2009. Although the time of harvesting was according to the maturation of each cultivar, harvesting and post-harvesting conditions were the same for all cultivars. The five samples were subjected to medium roasting for 8 to 11 minutes at 200-210 °C, until the degree of roasting light/media (L* around 28). The extraction of diterpens was carried out in green or roasted coffee by direct saponification with KOH, extraction with terc-butyl methyl ether...

Comportamento de cultivares de cafeeiro, sob irrigação, nas condições do município de Uberlândia-MG; Performance of coffee cultivars, under irrigation, in the conditions of Uberlândia-MG

Borges, André Luiz
Fonte: Universidade Federal de Uberlândia Publicador: Universidade Federal de Uberlândia
Tipo: Dissertação
Português
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O comportamento de diferentes variáveis nos anos de cultivos e interação entre anos de cultivo por cultivares de cafeeiro, sob irrigação, nas condições do município de Uberlândia-MG. São fatores importantes no conhecimento deste comportamento das cultivares de cafeeiros, a fim de identificar as melhores cultivares. Para tanto este trabalho foi desenvolvido com o objetivo de verificar este comportamento das cultivares em diferentes anos, de 2003 a 2006, e as variáveis como altura de planta, diâmetro de copa e diâmetro de caule, produtividade, rendimento e renda. Este estudo foi conduzido no Setor de Cafeicultura do Instituto de Ciências Agrárias, localizado na Fazenda Experimental do Glória, pertencente à Universidade Federal de Uberlândia. As cultivares foram Acaiá Cerrado MG 1474; Catuaí Vermelho IAC 15; Catuaí Vermelho IAC 99; Catuaí Amarelo IAC 17; Catuaí Amarelo IAC 62; Catuaí Vermelho IAC 144; Mundo Novo IAC379-19; Icatú Amarelo 3282; Rubi MG 1192 e Topázio MG 1190. Submetidas a irrigação por gotejamento. Por tanto, após as avaliações, as cultivares no cerrado mineiro irrigado nas condições de Uberlândia – MG, não apresentam um comportamento ideal para todos as variáveis. Contudo as cultivares de baixo porte Catuaí Amarelo IAC 62...

Trends in yielding ability and weed competitiveness of Australian wheat cultivars

Vandeleur, R.; Gill, G.
Fonte: The Australian Society of Agronomy Inc; www.regional.org.au/au/asa/2003 Publicador: The Australian Society of Agronomy Inc; www.regional.org.au/au/asa/2003
Tipo: Conference paper
Publicado em //2003 Português
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Wheat breeding in Australia has undoubtedly resulted in large improvements in grain yield. This has been partly achieved through reduced plant stature, which may have compromised the ability of modern cultivars to compete with weeds. Fourteen cultivars released to Australian growers from 1860 to 1994, were grown in a field study at Roseworthy to determine whether there has been a systematic decline in weed competitive ability of wheat varieties over time. Oats (Cv. Marloo) were used as the weedy competitor in this study and were sown with the wheat to create paired weedy and weed-free plots. A regression analysis of spatially adjusted mean wheat yield against the number of years since 1860 indicated a rate of increase of 16.6 kg/ha/year in yielding ability in the absence of weeds. The recently released cultivars, Spear, Excalibur and Frame suffered a greater yield loss due to weed competition but the actual yields in the presence of oats were still greater than that for the majority of older cultivars, except Gluyas Early, Nabawa and Gabo. Increased yield loss due to weed competition was associated with reduced plant height and light interception at early stem elongation (P<0.05). The newer varieties were consistently poor in suppressing weed growth and seed production. This decline in weed suppression was correlated with reduced early vigour (leaf 2 width; P<0.05) and plant height (P<0.06). The results clearly indicate that the improvements through plant breeding have increased the yielding ability of cultivars...

Analysis of leaf parameters of rain-fed maize cultivars

Asare, D.K.; Frimpong, J.O.; Ayeh, E.O.
Fonte: IDOSI Publications Publicador: IDOSI Publications
Tipo: Artigo de Revista Científica
Publicado em //2011 Português
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Leaf area index (LAI), specific leaf area (SLA) and leaf dry matter content (LDMC) are plant/crop physiological variables which could be used to differentiate among and select maize cultivars suitable for specific environmental conditions, particularly in rain-fed agriculture. The leaf area index, SLA, LDMC and total dry matter (TDM) were estimated for the three rain-fed maize cultivars (Golden Crystal, Mamaba and Obatanpa) during the major and minor cropping seasons. The experimental design used was the completely randomized block design in four replicates, with maize cultivars as treatments. This study was undertaken to assess differences or similarities in the time course of LAI, SLA and LDMC as an assessment of the response of the three maize cultivars to rain-fed conditions during the major and minor cropping seasons in a coastal savannah agro-ecological environment. Additionally, the linear correlation analysis was used to assess the association between LAI and SLA, LAI and LDMC, SLA and LDMC, SLA and LDMC, TDM and LAI as well as between TDM and LDMC for the three rain-fed maize cultivars. Generally, Obatanpa and Mamaba maize cultivars produced comparatively higher LAI which peaked at about 1.30 and 2.00 on 84 DAE during the major and minor cropping seasons...

Characterization of Carotenoid High-Producing Capsicum annuum Cultivars Selected for Paprika Production

Hornero-Méndez, Dámaso; Costa García, Joaquín; Mínguez Mosquera, María Isabel
Fonte: American Chemical Society Publicador: American Chemical Society
Tipo: Artículo Formato: 4085 bytes; image/gif
Português
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Twelve selected pepper (Capsicum annuum L.) cultivars, bred for mechanical harvesting (grouped ripeness) and adaptation to different cultivation cycles (short to long), have been characterized by their carotenoid pigment content and composition with the aim of producing high-quality paprika. A detailed analysis of the carotenogenesis was performed throughout the ripening process, but with special emphasis on the ripe stage, with the aim of selecting the best cultivar for paprika production. The MA1 cultivar (with grouped ripeness and very short cultivation cycle) showed the highest carotenoid content (12697.58 mg/kg dwt), followed by DN5 and RN2 cultivars with 11086.88 and 10393.29 mg/kg dwt, respectively. Most of the cultivars (MA3, RN1, LR2, LR7, DN3, DR6, Datler, and Mulato) showed a total carotenoid content in the range of 7000-9700 mg/kg dwt. In general, chlorophyll-retaining character was related to high carotenoid content (cultivars DN3, DN5, MA3, Mulato, RN1, and RN2). The general trend of the cultivation cycle was that the shorter the cycle, the higher the total carotenoid content (as exemplified by the cultivar MA1). The lowest total carotenoid content was found for the RR1 cultivar (4856.77 mg/kg dwt), which showed the longest cultivation cycle. Carotenogenic capacity of the cultivars has been discussed relative to total carotenoid content and the R/Y and Caps/Zeax ratios...

Eficiência de cultivares de milho na absorção e utilização de zinco; Efficiency of maize cultivars for zinc uptake and use

Furlani, Ângela Maria Cangiani; Furlani, Pedro Roberto; Meda, Anderson Rotter; Duarte, Aildson Pereira
Fonte: Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz Publicador: Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; ; ; Formato: application/pdf
Publicado em 01/06/2005 Português
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Zinc deficiency usually occurs in maize grown in Brazilian acidic soils. The aim of this study was to evaluate commercial maize cultivars for their Zn uptake and utilization efficiency. A greenhouse experiment using nutrient solution with young plants was carried out at Campinas, State of São Paulo, Brazil, in 2002. Treatments consisted of: 0.0; 0.1; 0.2; 0.4 and 0.8 mg L-1 Zn in the main plots and 24 commercial maize cultivars in the subplots, in a randomized complete block design. Zn concentration in shoot dry matter (SDM) ranged from 28.4 to 41.6 mg kg-1 among cultivars, clearly indicating a dilution effect, since a negative relation between SDM and plant height was shown. Total Zn-shoot content was a good parameter to discriminate cultivars, once correlated with plant height and SDM (r = 0.66** and r = 0.67**, respectively). Analysis of variance and polynomial regression for total Zn-shoot content was highly significant among cultivars and for the interaction cultivar vs Zn-concentration. Plants under low Zn presented up to three-fold differences among efficiency index values (E.I. = 8.59 to 26.42 mg² DM mug-1 Zn). The results with young plants indicated six maize cultivars classified as Zn-efficient and responsive (AG 7575, Tork...

Argentinean cultivars of Vitis vinifera grow better than European ones when cultured in vitro under salinity

Cavagnaro,Juan B.; Ponce,María T.; Guzmán,Javier; Cirrincione,Miguel A.
Fonte: Biocell Publicador: Biocell
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/2006 Português
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36.969395%
Argentinean Vitis vinifera cultivars although originated from Europe, have clear ampelographic and genotypic differences as compared with the European cultivars currently used in wine making. In vitro evaluation of salt tolerance has been used in many species. Our hypothesis was that Argentinean cultivars are more tolerant to salinity than European ones. Three European cultivars, Malbec, Cabernet Sauvignon and Chardonnay and four Argentinean cultivars, Cereza, Criolla Chica, Pedro Gimenez and Torrontes Riojano were tested by in vitro culture. Treatments included: 1) Control, 2) 60 mEq/L of a mixture of three parts of NaCl and one part of CaCl2 and 3) 90 mEq/L of the salt mixture. Results from two experiments (I and II) are reported. No differences were found in plant survival, expressed as % of the respective control, among cultivars. Leaf area, leaf, stem and total dry matter (DM) in Experiment I and leaf area, leaf number and leaf, stem, root and total DM in Experiment II, were higher in Argentinean cultivars than in European ones. We conclude that Argentinean cultivars show better performance in growing under salinity, especially in the highest salt concentration. Differences among cultivars, inside each group, were found for most of the measured variables.

Determination of metabolisable energy of five cultivars of hulless barley using adult leghorn cockerels

Rezaei,M.; Dehghan,M.; Ayatollahy,M.
Fonte: South African Journal of Animal Science Publicador: South African Journal of Animal Science
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2008 Português
Relevância na Pesquisa
36.864592%
Hulless barley contains more digestible nutrients than do whole barleys due to a lower content of indigestible fibre, but also contains a higher concentration of β-glucans. The chemical composition and apparent metabolisable energy (AME) of five cultivars (3, 7, 12, 15 and KC-31) of hulless barley were determined with adult Leghorn cockerels using a precision-feeding method. Cultivars KC-31 and 15 had the highest (121 g/kg) and lowest (87 g/kg) levels of crude protein, respectively. The AMEn for the five cultivars was 13.91, 12.20, 12.88, 13.23 and 10.95 MJ/kg DM, respectively. The true metabolisable energy corrected for nitrogen of the above cultivars was 14.37, 12.66, 13.34, 13.69 and 11.41 MJ/kg DM, respectively. Cultivar 3 contained the highest AME and TME levels, and differences between cultivars were significant. In general hulless barley can be used as a source of energy in poultry diets.