Phenotypic and Genetic Analysis of Lori-Bakhtiari Lamb's Weight at Different Ages for Autosomal and Sex-Linked Genetic Effects

الموضوعات :

م. مراونی ¹ (Department of Animal Science, Behbahan Branch, Islamic Azad University, Behbahan, Iran)
م. وطن‌خواه ² (عضو هیات علمی مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی شهرکرد)
س. عیدی‌وندی ³ (Department of Animal Science, Behbahan Branch, Islamic Azad University, Behbahan, Iran)

تاريخ الإرسال : 17 السبت , ذو القعدة, 1437 تاريخ التأكيد : 18 السبت , رجب, 1438 تاريخ الإصدار : 13 الخميس , جمادى الثانية, 1439

الکلمات المفتاحية: weight, autosomal and sex-linked, Lori-Bakhtiari lambs, non-genetic factor,

ملخص المقالة :

The data set used in this study contained 8793 records of lamb's weight (kg) from 320 sires and 2349 dams collected during 1989 to 2014 from the Lori-Bakhtiari flock at Shooli station in Shahrekord, Iran. Non-genetic factors and genetic parameters (partitioned into autosomal, sex-linked and maternal) of lamb's weight at different ages were estimated using without and with sex-linked genetic effects models. The results showed that the overall mean of lamb’s weight were 5.01, 28.93, 41.42, 51.33 and 56.52 kg at birth, weaning, 6, 9 and 12 months of age, respectively. The effect of fixed factors; year and month of birth, age of dam, sex of lamb, type of birth; dam body weight and age of lamb (days) as linear covariate were significant (P

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