Two-trait random regression model to estimate the genetic association of scrotal circumference with female reproductive performance in Nelore cattle
作者： M.L. Santana , J.P. Eler , A.B. Bignardi , J.B.S. Ferraz
DOI: 10.1016/J.THERIOGENOLOGY.2015.02.003
关键词:
摘要: In an attempt to determine when scrotal circumference (SC) could be a reasonable indicator of female reproductive performance, series two-trait random regression model (regression for SC on age at measurement) using Gibbs sampling was applied field data Nelore cattle raised in tropical environment. The traits evaluated were first calving (AFC), interval (FCI), heifer pregnancy (HP), and stayability (STAY). posterior means heritability ranged from 0.15 AFC 0.46 HP about 0.50 SC. genetic correlations between AFC, FCI, HP, STAY up -0.70, -0.25, 0.48, 0.29, respectively. Genetically, puberty (e.g., HP) as long it is measured young (400-440 days). However, older STAY), merely modest or even poor indicator. use sire expected progeny differences will more effective than the improve performance cattle.
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