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Estimation of genetic parameters for weight traits and Kleiber Index in a Brahman cattle population Scientia Agricola
Manuel,Matos; Cavani,Ligia; Millen,Danilo Domingues; Andrighetto,Cristiana; Lupatini,Gelci Carlos; Fonseca,Ricardo da.
ABSTRACT: Interest in improving feed efficiency of cattle has been increasing. The residual feed intake (RFI), the most commonly used measurement of feed efficiency, is expensive and can only be used in a small number of animals. The Kleiber Index has also been proposed to measure RFI. In this study, we estimated genetic parameters for the Kleiber Index average daily weight gain and adjusted weights to obtain a more comprehensive understanding of potential responses to selection and support the development of breeding strategies. Genetic analyses were conducted on animal records from a data file with 36,505 animals recorded by ABCZ (Brazilian Association of Zebu Breeders). Restricted maximum likelihood estimates of genetic parameters were computed with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Genetic correlation; Average daily gain; Heritability; Standard age weight.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001600459
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Genetic diversity of Brazilian Brahman cattle by pedigree analysis PAB
Cavani,Ligia; Silva,Rafael Medeiros de Oliveira; Carreño,Luis Orlando Duitama; Ono,Rafael Keith; Bertipaglia,Tássia Souza; Farah,Michel Marques; Millen,Danilo Domingues; Fonseca,Ricardo da.
Abstract: The objective of this work was to evaluate the genetic diversity of Brahman cattle in Brazil with pedigree analysis. Genealogical records of a subpopulation were used considering all pedigree information (Pt) and the pedigree information divided into two periods (P1, from 1994 to 2004; and P2, from 2005 to 2012) or according to the raising system (Ppt, animals on pasture; or Pst, on stable). Estimates were obtained for average inbreeding coefficients, generation intervals (GI), number of equivalent known generation (CGE), number of founders (Nf), effective number of founders (fe), effective number of ancestors (fa), and founder genome equivalents (fg). The average inbreeding coefficients were 11.97, 7.79, 11.95, 11.74, and 11.31% for Pt, P1, P2,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Beef cattle; Founders; Genetic bottleneck; Inbreeding.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000100074
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