サラブレッド種における体型計測値の遺伝•表型パラメータの推定

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タイトル別名
  • The Estimation of Genetic and Phenotypic Parameters of Body Measurements in Thoroughbreds
  • サラブレッドシュ ニ オケル タイケイ ケイソクチ ノ イデン ヒョウガタ パ

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We estimated the heritabilities of 24 body measurements and the genotypic and phenotypic correlation between them in Thoroughbreds. Data were obtained from 189 3-year-old Thoroughbreds of 68 sires which have more than two progenies. The data was analyzed by the least-square analysis using the Method 3 of Henderson (1953). The sire, sex and training place were contained as effects. As a result, the sire effects on the height at back, the height at breast, the length of cannon, the length of hind cannon, the thickness of breast and the circumference of girth were significant at above 5% levels, and the heritabilities of these 6 measurements were estimated to be high. The genetic correlations were from -1.84 to +3.17. However, some values were not reliable because these standard error is a large. Each correlation among the four measurements, that is the height at withers, the height at back, the height at croup and the circumference of girth, were estimated to be higher, ranging from +0.70 to +0.95. On the other hand, the minus correlations between the three parts, that is the height at withers, the height at back and the height at croup, and the body length were from -0.51 to -0.24. The phenotypic correlations were from -0.03 to +0.91. The high correlation among the three measurements, that is the height at withers, the height at back and the height at croup, and others were estimated. Especially noticeable is the correlation between the height at withers and the height at back which is estimated to be the highest.

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  • 日本畜産学会報

    日本畜産学会報 60 (4), 372-378, 1989

    公益社団法人 日本畜産学会

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