국내산 더러브렛 경주마의 씨수말 평가 기준으로 이용되는 연간수득상금 분석

Abstract

본 연구는 연간수득상금형질을 이용한 국내 씨수말 평가시스템을 분석하여 주파기록과의 관계를 구명하고자 수행되었다. 씨수말 당평균 자마수와 출주수는 각각 34두와 221회였다. 반면에 평균 2세 자마수와 출주수는 각각 9두와 25회였으며, 2세 자마들이 벌어들인 상금은 연간 수득상금의 8.3%였다. 연간수득상금에 대한 자마수와 출주수간의 단순상관계수는 각각 0.922와 0.934, 그리고 자마수와 출주수간의 단순상관계수는 0.985로 매우 높게 나타났다. 씨수말의 검정경력 첫해의 평균 자마수는 6두, 출주수는 17회로 매우 낮았으며, 검정경력에 따른 자마수와 연간수득상금은 매우 밀접한 관계를 나타내었다. 검정경력 4년차에서 40두 이상의 자마수를 확보하는 것으로 나타났으며, 자마수가 증가할수록 평균수득상금지수는 일괄적으로 증가하였다. 자마수가 30두 이하의 씨수말들의 평균수득상금지수는 1.00 보다 낮았으며, 자마수가 10두 이하인 경우에는 0.06에서 0.13의 범위를 나타내어 자마수는 씨수말의 순위 결정에 매우 큰 영향을 미치고 있었다. 주파기록에 대한 육종가와 출주당 수득상금의 상관계수는 다른 형질들에 비하여 가장 높은 -0.524에서 -0.633의 범위를 나타내었다. This study was conducted to analyze demerits of the sire evaluation system using annual earnings and to examine relationship between annual earnings and finish time in home-produced thoroughbred racehorses. The average number of progenies and number of starts per sire were 34 heads and 221 times, respectively. On the other hand, the number of progenies with the average age of 2 years and the number of starts were 9 heads and 25 times, respectively. The earnings of the horses with the age of 2 years accounted for 8.3% of annual earnings. The simple correlation coefficient between the number of progenies and the number of starts in annual earnings were 0.922 and 0.934, respectively. The correlation coefficient between the number of progenies and the number of starts was very high (0.985). The number of progenies and starts of sires for the first year of test career were very low (6 heads and 17 times), and there was very close relationship between number of progenies and annual earnings by the year of test career. The number of progenies was over 40 heads during the first 4 years of test career, and as the number of progenies increased the average earning index increased. The average earning index of sires with less than 30 progenies was lower than 1.00. When the number of progenies was less than 10, the average earning index was in the range of 0.06~0.13, indicating that the number of progenies affects much for determining the ranking of sires. The correlation coefficient between breeding value for finish time and annual earnings per start was very high (-0.524~-0.633) compared with other traits.