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The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus >
No.31 (1984/11) >

 
Title :黒毛和種産肉能力検定直接法成績による種雄牛および検定雄牛の遺伝的評価(畜産学科)
Title alternative :Genetic evaluation of sires and bulls by BLUP method on records of performance test of Japanese Black cattle (Department of Animal Science)
Authors :及川, 卓郎
新城, 明久
Authors alternative :Oikawa, Takuro
Shinjo, Akihisa
Issue Date :19-Nov-1984
Abstract :黒毛和種産肉能力検定直接法成績を用い, BLUP法により全国の検定場にわたる種雄牛の遺伝的評価および検定雄牛の遺伝的評価を行った。種雄牛と検定雄牛の順位相関は同じ傾向を示し, 1日平均増体量とTDN要求率間には高い相関, 1日平均増体量とTDN要求率間では中位の相関, TDN要求率と365日齢体重間では低い相関がみられた。各形質について種雄牛および検定雄牛の上位牛をみると365日齢体重では鳥取系の牛が高い能力を示し, 1日平均増体量では鳥取系の牛および系統間交雑系の牛が高い能力を示した。一方, TDN要求率では系統間交雑系の牛が特に高い能力を示し, TDN要求率などの効率に関する形質については, ヘテローシスの効果が大きいことが示唆された。
Genetic evaluation of sires and bulls of Japanese Black Cattle was done by BLUP method on records of performance test program carried out in ten prefectual testing stations across the nation. The rank correlations of sires and bulls were high between 365 days body wt. and ADG, medium between ADG and TDN conversion and low between TDN conversion and 365 days body wt.. Most of the high ranking sires and bulls were from Tottori line (genetic group) for 365 days body wt., from Tottori line and crossbreds between lines for ADG and from crossbreds for TDN conversion. From these results, sires and bulls from Tottori line and crossbreds had high performance for growth traits, however, crossbred sires and bulls had high performance for TDN conversion, which suggested heterosis in crossbred cattle.
Type Local :紀要論文
ISSN :0370-4246
Publisher :琉球大学農学部
URI :http://hdl.handle.net/20.500.12000/3968
Citation :琉球大学農学部学術報告 = The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus no.31 p.85 -90
Appears in Collections:No.31 (1984/11)

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