Genetic progress evaluation of growth traits in Moghani sheep

Autor: Esrafili Taze Kand Mohammaddiyeh Maryam, Behmaram Reza
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Biotechnology in Animal Husbandry, Vol 39, Iss 1, Pp 15-32 (2023)
Druh dokumentu: article
ISSN: 1450-9156
2217-7140
Popis: For evaluation of growth traits' genetic progress, pedigree information of 39408 Moghani sheep, between 1986 to 2016, at the breeding station of Moghani sheep was used. Studied traits included birth weight, weaning weight, six months weight, nine months weight, and one yearling weight. Variance components and genetic parameters of traits were estimated by restricted likelihood and six animal models using Wombat software. Direct heritability of birth weight, weaning weight, six months weight, nine months weight, and one yearling weight was (0.07, 0.09, 0.15, 0.13, and 0.20 respectively). Breeding values for the calculation of genetic trends for each trait were estimated by using the univariate best animal model. Phenotypic, genetic, and environmental trends of traits were estimated via regression of phenotypic average, breeding value average, and difference of breeding value from phenotypic value divided by birth year. The calculated genetic trends of birth weight, weaning weight, six months weight, nine months weight, and yearling weight were 0.008, 0.012, 0.054, 0.74, and 0.145 kg/year respectively, except for birth weight, the others were significant (p
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