Direct and maternal genetic trend estimates for body weight traits of Iran-Black Sheep using multivariate animal models

Autor: Javad Ahmadpanah, Hasan Baneh, Chia Kohnepoushi
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Zdroj: Songklanakarin Journal of Science and Technology (SJST), Vol 38, Iss 3, Pp 305-310 (2016)
Druh dokumentu: article
ISSN: 0125-3395
Popis: The objective of the present study was to estimate direct and maternal genetic trends for body weight traits in IranBlack sheep using data which were collected for 24 years. The investigated traits were birth weight (BW), weaning weight (WW), 6-month weight (6MW), 9-month weight (9MW) and yearling weight (YW). A multivariate animal model analysis was applied to predict the breeding values of individual for the studied traits. For each trait, genetic trends were obtained by regressing the means of predicted breeding values on year of birth. Direct genetic trends were positive and highly significant (P
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