Genetic parameters for gestation length and the relationship with birth weight and carcass traits in Japanese Black cattle

Takayuki Ibi, Alexander K. Kahi, Hiroyuki Hirooka

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The objectives of this study were to estimate genetic parameters for gestation length (GL), including estimation of maternal effects, and to investigate the genetic relationships of GL with birth weight and carcass traits in a Japanese Black cattle population. The original data comprised 34 775 records of animals born from October 1999 to August 2003. Two different models were used to analyze the data for GL. The first model (M1) included direct genetic effect of the calf and maternal genetic effect as random effects. The second model (M2) treated GL as a trait of the dam and included direct genetic effects only. M1 was used in bi-variate analysis. The direct and maternal heritabilities for GL estimated from M1 were 0.53 and 0.14, respectively. This result shows that GL is moderately inherited and can be controlled genetically. The direct × maternal genetic correlation for GL was -0.73. Direct genetic correlations of GL with carcass traits were close to zero. However, genetic correlation of maternal GL with carcass weight was moderate (0.25).

Original languageEnglish
Pages (from-to)297-302
Number of pages6
JournalAnimal Science Journal
Volume79
Issue number3
DOIs
Publication statusPublished - Jun 1 2008
Externally publishedYes

Keywords

  • Carcass trait
  • Genetic parameter
  • Gestation length
  • Japanese Black cattle

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

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