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2015
DOI: 10.4238/2015.october.19.2
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Genetic parameters for milk production traits and breeding goals for Gir dairy cattle in Brazil

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Cited by 11 publications
(10 citation statements)
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References 13 publications
(15 reference statements)
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“…The economic values for milk production were positive, indicating that selection for this trait would imply in economic gain for the producer. These values are consistent with those reported in other studies (Komlósi et al, 2010;Prata et al, 2015), even though, at the time when these studies were developed, the economic scenarios were different. As in the literature, the results of this study were expected, since there is still greater emphasis on payment by volume of milk produced and not quality.…”
Section: Laborsupporting
confidence: 90%
See 1 more Smart Citation
“…The economic values for milk production were positive, indicating that selection for this trait would imply in economic gain for the producer. These values are consistent with those reported in other studies (Komlósi et al, 2010;Prata et al, 2015), even though, at the time when these studies were developed, the economic scenarios were different. As in the literature, the results of this study were expected, since there is still greater emphasis on payment by volume of milk produced and not quality.…”
Section: Laborsupporting
confidence: 90%
“…A phenotypic and genetic (co)variance matrix (table III), positive defined (Van Der Werf, 1999), was estimated using the phenotypic and genetic parameters from national and international literature (Andrade et al, 2007;Prata et al, 2015;Pritchard et al, 2013;Campos et al, 2015;Cobuci and Costa, 2012;Petrini et al, 2016). This was then used to calculate the discounted economic value by multiplying the economic value by the cumulative discounted expression (Brascamp, 1978) to and then a linear selection index, which predicts the breeding goal as accurately as possible, given the information that is available in the form of EBV for individual traits:…”
Section: Methodsmentioning
confidence: 99%
“…Breeding programs primarily emphasize increased milk yield and its constituents (Prata et al, 2015). However, to optimize both yield and longevity, it is indispensable that the morphological structure and body condition sustain production and continue in the herd.…”
Section: Introductionmentioning
confidence: 99%
“…Estudos realizados com bovinos Gir têm mostrado correlações genéticas positivas (rg > 0,90) entre características produtivas aos 305 dias de lactação, tais como produção de leite , gordura e proteína PRATA et al, 2015), o que indica que a seleção para uma delas poderia levar, neste caso, a uma resposta correlacionada favorável e positiva na outra. Para raças mais especializadas na produção leiteira, tais como Holandesa, Jersey e Pardo-Suíça, estimativas de correlações genéticas de moderadas a altas e favoráveis também foram encontradas na literatura (0,46 a 0,94) (ROMAN e WILCOX et al, 2000;MIGLIOR et al, 2007;DECHOW et al, 2007;.…”
Section: Relação Entre Produção De Leite Gordura E Proteínaunclassified
“…Poucos trabalhos para bovinos leiteiros envolvendo índices de seleção no Brasil foram encontrados na literatura consultada PRATA et al, 2015), em função da dificuldade de obtenção de informações de desempenho de um grande número de características, em especial, daquelas relacionadas à qualidade do leite e fertilidade. Este trabalho tem como objetivo desenvolver um estudo visando a construção de índices de seleção para posterior utilização na classificação e seleção dos animais avaliados no programa de teste de progênie do Gir Leiteiro, executado pela Associação Brasileira dos Criadores de Gir Leiteiro (ABCGIL) em parceria com a Embrapa Gado de Leite.…”
Section: Introdução Geralunclassified