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RISS 인기검색어
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- 저자 : 신미영(M . Y . Sin) (검색결과 1 건)
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이광전(K . J . Lee),박경도(K . D . Park),양영목(Y . M . Yang),최윤석(Y . S . Choi),안준천(J . C . An),신미영(M . Y . Sin) 한국축산학회 1992 한국축산학회지 Vol.34 No.4
A total of 6,338 racing times of 690 horses was used for this study. Data were repeated racing times of horses that raced at least three times at the 1000m race for a year, 1991 and collected from the Korean Racing Association (K.R.A.). Results obtained were as follows. 1. Investigated percentages of the total variance accounted for by contemporary group, month, day and race were 7.73%, 8.45% and 29.55%, respectively. Ratios ²σ_e/²σ_a and ²σ_e/²σ_p were 3.486 and 10.457, respectively. 2. Animal model used repeated racing times. Estimated breeding values of the horses ranged from -2.44 to +2.65. The regression coefficient and r² of the breeding value on birth-year were 0.04 and 0.001, respectively. Breeding value and permanent environmental effect did not have significant variation among the birth years. 3. The trait that has the highest correlation with estimated breeding values for repeated racing times was the average time. The correlation coefficient between the two traits and estimate of heritability for the average time were 0.86 and 0.41, respectively. 4. Performance index obtained by the multiple regression procedure of the estimated breeding values for the repeated racing times on the other traits was as follows. I = -47.6564 - 0.0193X₁ + 0.6405X₂ + 0.0972X₃ - 0.0047X₄ (r²=0.76) (X₁=best time, X₂=average time, X₃=poorest time, X₄=% races placed 1-2).
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