黒毛和種繁殖雌牛の登録審査時の諸形質ならびに繁殖能力と枝肉成績との遺伝的関連性

書誌事項

タイトル別名
  • Genetic Relationships Among Traits Recorded at Registry Judgment, Reproductive Traits of Breeding Females and Carcass Traits of Fattening Animals in Japanese Black Cattle
  • Genetic Relationships Among Traits Reco

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抄録

Abstract Genetic relationships among traits recorded on breeding females and carcass traits of fattening animals in Japanese Black cattle were estimated using REML procedure under multiple-trait animal models. Traits analyzed were five exterior judging traits, three body measurements at registry judgment, two reproductive traits (age at first calving, AFC; average calving interval, ACI) of breeding females and five carcass traits collected in Hiroshima prefecture. Heritabilities of exterior judging traits, body measurements and carcass traits were estimated at moderate to high, while those of reproductive traits were very low. Genetic correlations among exterior judging traits and body measurements were high when the ratio of body weight to withers height was not included in analytical model. Generally exterior judging traits, body measurements and carcass traits correlated favorably with AFC. However carcass beef marbling score correlated unfavorably with ACI. Because selection on carcass traits will be more intense, considerations will be necessary on ACI.

収録刊行物

  • 日本畜産学会報

    日本畜産学会報 67 (6), 511-518, 1996

    公益社団法人 日本畜産学会

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