Measurements from 13 different morphological traits of importance in the Pura Raza Español (PRE) horse were used to estimate genetic and environmental parameters following a heteroscedastic model in which data were assigned to stallions. Data sets used ranged from 20,610 (height at withers) to 48,486 measurements (length of shoulder), and the number of animals analysed in the pedigrees varied from 17,662 (height at withers) to 23,962 (dorsal–sternal diameter). Results of heritabilities of the traits varied from 0.09 (width of chest and upper neck line) to 0.30 (muscular development). Further, genetic correlations between traits and their environmental variability were estimated, obtaining values from −0.56 (muscular development) to 0.69 (height at withers). Also, predicted breeding values for the mean and for the environmental variability were obtained for all horses in the pedigrees, providing individual information about not only the expected phenotypic value of their offspring but also the expected heterogeneity among them. Results proved the possibility of improving morphological traits and reducing the heterogeneity of offspring at a time by the selection of animals and levels of systematic effects.

中文翻译：

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用于 Pura Raza Español 马形态特征运河化分析的遗传参数

来自 Pura Raza Español (PRE) 马的 13 种不同重要形态特征的测量值用于根据异方差模型估计遗传和环境参数，其中数据分配给种马。使用的数据集范围从 20,610（肩高）到 48,486 次测量（肩长），谱系中分析的动物数量从 17,662（肩高）到 23,962（背胸骨直径）不等。性状的遗传结果从0.09（胸部和上颈线的宽度）到0.30（肌肉发育）不等。）。此外，还估计了性状与其环境变异性之间的遗传相关性，获得了从 -0.56（肌肉发育）到 0.69（肩高）的值。此外，还获得了谱系中所有马匹的平均和环境变异性的预测育种值，不仅提供了关于其后代的预期表型值的个体信息，还提供了它们之间预期的异质性。结果证明，通过动物的选择和系统效应的水平，可以一次改善形态特征并减少后代的异质性。