Próchniak Tomasz, Rozempolska-Rucińska Iwona, Zięba Grzegorz, Łukaszewicz Marek
Institute of Genetics and Animal Breeding, Polish Academy of Sciences, Jastrzębiec, 05-552 Magdalenka, Poland .
Asian-Australas J Anim Sci. 2015 Aug;28(8):1090-4. doi: 10.5713/ajas.14.0866.
The aim of the study was to select traits that may constitute a prospective criterion for breeding value prediction of young horses. The results of 1,232 starts of 894 four-, five-, six-, and seven-year-old horses, obtained during jumping championships for young horses which had not been evaluated in, alternative to championships, training centres were analyed. Nine traits were chosen of those recorded: ranking in the championship, elimination (y/n), conformation, rating of style on day one, two, and three, and penalty points on day one, two, and three of a championship. (Co)variance components were estimated via the Gibbs sampling procedure and adequate (co)variance component ratios were calculated. Statistical classifications were trait dependent but all fitted random additive genetic and permanent environment effects. It was found that such characteristics as penalty points and jumping style are potential indicators of jumping ability, and the genetic variability of the traits was within the range of 14% to 27%. Given the low genetic correlations between the conformation and other results achieved on the parkour, the relevance of assessment of conformation in four-years-old horses has been questioned.
本研究的目的是选择可能构成幼马育种价值预测前瞻性标准的性状。分析了894匹4岁、5岁、6岁和7岁马匹在幼马跳跃锦标赛中的1232次参赛结果，这些比赛是在未在锦标赛中进行评估的替代训练中心获得的。从记录的性状中选择了九个：锦标赛排名、淘汰（是/否）、体型、第一天、第二天和第三天的风格评分，以及锦标赛第一天、第二天和第三天的罚分。通过吉布斯采样程序估计（协）方差分量，并计算适当的（协）方差分量比率。统计分类取决于性状，但所有模型都拟合了随机加性遗传效应和永久环境效应。结果发现，罚分和跳跃风格等特征是跳跃能力的潜在指标，性状的遗传变异在14%至27%的范围内。鉴于体型与在障碍赛中取得的其他成绩之间的遗传相关性较低，对4岁马匹体型评估的相关性提出了质疑。
