BRS Paiaguás: A new Brachiaria (Urochloa) cultivar for tropical pastures in Brazil

Valle, Cacilda Borges do; Euclides, Valéria Pacheco Batista; Montagner, Denise Baptaglin; Valério, José R.; Fernandes, Celso D.; Macedo, M. C. M.; Verzignassi, J. R.; Machado, L. A. Z.

doi:10.17138/tgft(1)121-122

Cited by 37 publications

(26 citation statements)

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“…A better distribution of wet‐ and dry‐season yields in tropical forages is a well‐recognized demand of livestock producers, particularly in central Brazil, where animals are bred and finished under grazing (Euclides et al ., ). However, the Arachis ecotypes showed poor ability to produce herbage during the dry season, similar to the more important grasses cultivated in the Cerrado region (Valle et al ., ).…”

Section: Discussionmentioning

confidence: 97%

Forage peanut (Arachis spp.) genetic evaluation and selection

Simeão

Assis

Montagner

et al. 2016

Grass and Forage Science

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Forage peanut improvement for use in grass–legume mixtures is expected to have a great impact on the sustainability of Brazilian livestock production. Eighteen cloned Arachis spp. ecotypes were evaluated under clipping in a Brazilian Cerrado region and results analysed using a mixed model methodology. The objective was to estimate genetic and phenotypic parameters and to select the best ecotypes based on selection index applied on their predicted genotypic value. The traits of total dry‐matter (DM) and leaf DM yield presented moderate (0·30 < hg2 < 0·50) to high (>0·50) broad‐sense heritability, in contrast to the low genetic variability in nutritional quality‐associated traits. Ecotypes of Arachis spp. contained average crude protein concentrations of 224 g kg−1 DM in leaves and 138 g kg−1 DM in stems, supporting the potential role of these species to overcome the low protein content in Cerrado pastures. The correlations between yield traits and traits associated with low nutritional value in leaves were consistently significant and positive. Genetic correlations among all the yield traits evaluated during the rainy or dry seasons were significant and positive. The ecotypes were ranked based on selection index. The next step is to validate long‐term selection of grass–Arachis in combination with pastures under competition and adjusted grazing in the Cerrado region.

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Section: Discussionmentioning

confidence: 97%

Forage peanut (Arachis spp.) genetic evaluation and selection

Simeão

Assis

Montagner

et al. 2016

Grass and Forage Science

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“…Marandu and Basilisk cultivars have high forage production potential, but are not adapted to long‐term droughts (Guenni et al., ; Santos et al., ). BRS Paiaguás was recommended as a new cultivar based on its forage production and quality, particularly during the dry season, which results in improved animal production when compared to other U. brizantha cultivars (Valle et al., ). Medly is a Mediterranean cultivar of D. glomerata (a C3 species) used for comparison since it showed high dehydration tolerance in previous experiments (Poirier, Durand, & Volaire, ).…”

Section: Methodsmentioning

confidence: 99%

Large variability in drought survival among Urochloa spp. cultivars

Beloni

Santos

Rovadoscki

et al. 2018

Grass and Forage Science

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The Urochloa spp. cultivars are largely used for forage production in tropical and humid subtropical zones in Brazil. However, in areas of transition to drier zones, the persistence of Urochloa cultivars may be jeopardized by severe drought. We aimed to quantify and describe variability in growth potential under irrigation as well as dehydration tolerance and avoidance in cultivars under severe drought of Urochloa C4 species (Urochloa brizantha, cvs. Marandu and BRS Paiaguás and Urochloa decumbens cv. Basilisk), which were hypothesized to be less dehydration tolerant than a Mediterranean C3 species (Dactylis glomerata L. cv. Medly). Two experiments were carried out in a controlled environment—one in pots and one in long tubes—each under irrigation and drought successively. Marandu and Basilisk cultivars produced double the aerial and root biomass of cv. BRS Paiaguás. Their root systems were also deeper conferring them higher dehydration avoidance; however, they exhibited lower dehydration tolerance under severe drought. Conversely, cv. BRS Paiaguás was less productive, more dehydration tolerant and, therefore, able to survive at lower soil moisture, similar to the drought tolerant cv. Medly. The BRS Paiaguás cultivar may show sward persistence where extreme drought is experienced, but results should be confirmed under field conditions.

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“…Um dos principais objetivos dos programas de melhoramento genético de U. brizantha é a seleção de plantas com maior teor de proteína bruta (Valle et al, 2013;. Para que isto ocorra, é fundamental o conhecimento das correlações entre os caracteres qualitativos, uma vez que estes podem impactar positiva ou negativamente o progresso genético.…”

Section: Forage Quality Trait Contribution To Crude Protein Content Iunclassified

Contribuição dos caracteres de qualidade da forragem ao teor de proteína bruta em Urochloa brizantha

Torres

Valle

Lempp

et al. 2016

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi identificar quais caracteres qualitativos poderão ser usados na seleção direta e indireta de genótipos de Urochloa brizantha, quanto ao teor de proteína bruta. Foram avaliados nove genótipos, em delineamento de blocos ao acaso, com duas repetições. Os caracteres qualitativos avaliados foram: volume de gás acumulado nas frações rápida e lenta, proteína bruta, fibras em detergentes neutro e ácido, celulose, lignina, sílica e digestibilidade in vitro da matéria orgânica. A digestibilidade in vitro da matéria orgânica é indicada tanto para a seleção direta quanto indireta de genótipos de U. brizantha com maior teor de proteína bruta.Termos para indexação: análise de trilha, associação entre caracteres, melhoramento genético, teor de proteína bruta. Forage quality trait contribution to crude protein content in Urochloa brizanthaAbstract -The objective of this work was to identify which qualitative characters can be used in the direct and indirect selections for high-protein content of Urochloa brizantha genotypes. Nine genotypes were evaluated in a randomized complete block design, with two replicates. The following qualitative traits were studied: volume of packed gas in fast and slow fractions, crude protein, acid and neutral detergent fibers, cellulose, lignin, silica, and in vitro digestibility of organic matter. The in vitro digestibility of organic matter is indicated for both direct and indirect selections of U. brizantha genotypes with higher crude protein content.

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BRS Paiaguás: A new Brachiaria (Urochloa) cultivar for tropical pastures in Brazil

Cited by 37 publications

References 0 publications

Forage peanut (Arachis spp.) genetic evaluation and selection

Forage peanut (Arachis spp.) genetic evaluation and selection

Large variability in drought survival among Urochloa spp. cultivars

Contribuição dos caracteres de qualidade da forragem ao teor de proteína bruta em Urochloa brizantha

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