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Direct and maternal genetic trend estimates for body weight traits ofIran-Black Sheep using multivariate animal models |
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| รหัสดีโอไอ | |
| Creator | 1. Javad Ahmadpanah 2. Hasan Baneh 3. Chia Kohnepoushi |
| Title | Direct and maternal genetic trend estimates for body weight traits ofIran-Black Sheep using multivariate animal models |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2016 |
| Journal Title | Songklanakarin Journal of Science and Technology (SJST) |
| Journal Vol. | 38 |
| Journal No. | 3 |
| Page no. | 305-310 |
| Keyword | Iran-Black sheep,growth traits,multivariate animal models,genetic trend |
| ISSN | 0125-3405 |
| Abstract | The objective of the present study was to estimate direct and maternal genetic trends for body weight traits in IranBlacksheep 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 wasapplied to predict the breeding values of individual for the studied traits. For each trait, genetic trends were obtained byregressing the means of predicted breeding values on year of birth. Direct genetic trends were positive and highly significant(P<0.01) for BW, WW, 6MW, 9MW, and YW and were 0.93, 43.74, 81.72, 87.29, and 137.61 g/year, respectively. Also, maternalgenetic trend for BW and 6MW was significant and were 4.60 and -14.38 g/year, respectively. The results showed thatimprovement of body weight traits of Iran-Black sheep seems to be possible in selection programs. |
