Genetic variation in durability of Swedish Warmblood horses using competition results
Genetic variation in durability of Swedish Warmblood horses using competition results
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DOI：
10.1016/j.livsci.2011.07.011
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发表时间：
2011-12-01
影响因子：
1.8
通讯作者：
Philipsson, J.
中科院分区：
文献类型：
--
作者：
Braam, A.;Nasholm, A.;Philipsson, J.
该研究的目的是调查在瑞典温血马的遗传评估中使用比赛年数作为耐久性衡量标准的可能性。1971年至2008年期间记录的盛装舞步、跳跃表演和三项赛的比赛结果被用来估计比赛年数的遗传参数。研究仅包括1967年至1991年出生的未用于育种的雄性马（17，962匹马）。这项研究表明，在早期就在一个以上的学科中获得名次的马有最长的比赛生涯。这一结果表明，这些马是有天赋的运动，也可能有一个积极的影响，全面的训练年轻的马匹对他们的耐久性。比较了不同线性混合动物模型对比赛年数遗传参数的估计。根据不同的模型和转换的遗传总的竞争年数在0.07和0.17之间变化。当根据第一次参加比赛时的年龄对模型进行调整时，获得了较低的值。跳高比赛年的遗传力较高，三项赛的遗传力较低。在年轻的马测试和点在竞争（寿命和年轻的马）的性能性状得分表现出积极的遗传相关性与总的竞争年数。这些结果表明，参加比赛的年份代表了马匹的耐久性和他们的表现天赋。因此，可以用竞争年限作为耐久性遗传评价的指标。(C)2011 Elsevier B.V.保留所有权利。
The aim of the study was to investigate the possibilities of using number of years in competition as a measure of durability in the genetic evaluation of Swedish Warmblood horses. Competition results recorded between 1971 and 2008 in the disciplines dressage, show jumping and eventing were used to estimate genetic parameters for number of years in competition. Only male horses not used in breeding born between 1967 and 1991 were included in the study (17,962 horses). The study showed that horses with placings in more than one discipline at an early age had the longest competition career. This result suggests that these horses are talented for sports and possibly also that there is a positive effect of all-round training of young horses on their durability. For estimation of genetic parameters for number of years in competition different linear mixed animal models were compared. Depending on the model and transformation the heritability for total number of years in competition varied between 0.07 and 0.17. The lower values were obtained when adjustments in the model were made for age at first placing in competition. Higher heritabilities were obtained for competition years in show jumping and lower for eventing. Performance traits scored at young horse tests and as points in competition (lifetime and for young horses) showed positive genetic correlations with total number of years in competition. These results indicate that years in competition represent both the durability of the horses and their talents for performance. It is suggested that number of years in competition may be used for genetic evaluation of durability. (C) 2011 Elsevier B.V. All rights reserved.