The present work evaluated animal models comprising direct and maternal effects to estimate (co)variance components and genetic parameters of growth rates and Kleiber ratio in Harnali sheep. The information on pedigree and targeted traits of 1862 lambs born to 144 sires and 591 dams was collected for the period from 1998 to 2018. The traits studied were average daily gain from birth to 3 months of age (ADG1), 3 months to 6 months of age (ADG2), and 6 months to 12 months of age (ADG3) and their corresponding Kleiber ratios as KR1, KR2 and KR3, respectively. The statistical methods included the general linear model for analyzing the effects of fixed factors and animal models for deriving variance components for targeted traits. According to best model evaluated on the basis of likelihood ratio test, the estimated direct heritability was low in magnitude and ranged from 0.04 to 0.14. Direct heritability estimates for ADG1, ADG2, ADG3, KR1, KR2 and KR3 were 0.06, 0.14, 0.05, 0.04, 0.11 and 0.05, respectively. The maternal genetic effects contributed (4–7%) significantly for ADG1, KR1 and KR2 traits. The genetic correlations ranged from −0.35 ± 0.11 (ADG1-KR2) to 0.98 ± 0.01 (ADG2-KR2 and ADG3-KR3) and phenotypic correlations ranged from −0.36 ± 0.02 to 0.98 ± 0.01 for ADG1-KR2 and ADG2-KR2, respectively. The significant maternal effects along with low levels of direct effects for average daily gain and Kleiber ratio at different age group should be considered while setting selection and managerial strategies to achieve anticipated growth rates in Harnali sheep.

目前的工作评估了动物模型，包括直接和母体效应，以估计 Harnali 羊的生长速率和 Kleiber 比率的 (co) 方差分量和遗传参数。收集了 1998 年至 2018 年期间 144 头公牛和 591 头母猪所生的 1862 只羔羊的谱系和目标性状信息。研究的性状是从出生到 3 个月大（ADG 1）、3 个月到 6 个月的平均日增重月龄 (ADG 2 ) 和 6 月龄至 12 月龄 (ADG 3 ) 及其相应的 Kleiber 比率为 KR 1、 KR 2和 KR 3 ，分别。统计方法包括用于分析固定因素影响的一般线性模型和用于导出目标性状的方差分量的动物模型。根据基于似然比检验评估的最佳模型，估计的直接遗传力大小较低，范围为0.04至0.14。ADG 1、ADG 2、ADG 3、KR 1、KR 2和 KR 3的直接遗传力估计值分别为 0.06、0.14、0.05、0.04、0.11 和 0.05。母体遗传效应对 ADG 1、KR 1和 KR 2的贡献显着（4-7%）特征。遗传相关性范围为 -0.35 ± 0.11 (ADG 1 -KR 2 ) 至 0.98 ± 0.01 (ADG 2 -KR 2和 ADG 3 -KR 3 )，表型相关性范围为 -0.36 ± 0.02 至 0.98 ± 0.01 对于 ADG 1 -分别为KR 2和 ADG 2 -KR 2。在制定选择和管理策略以实现哈纳利羊的预期生长速度时，应考虑到对不同年龄组平均日增重和克莱伯比率的显着母体影响以及低水平的直接影响。