Estimation of inbreeding coefficient and its effects on birth weight and kid survival in Markhoz goats


A. Rashidi , M. Almasi, M. Razmkabir
Department of Animal Science, College of Agriculture, University of Kurdistan, Sanandaj




Abstract:
Pedigree data of 4186 Markhoz goats which collected from 1993-2012 by Markhoz
goat Performance Testing Station in Sanandaj, Kurdistan province of Iran, were analyzed
for estimation of inbreeding coefficient and its effects on birth weight (BW) and kid
survival (KS). The results showed 58.07% of animals were inbred. The means of inbreeding
coefficient for whole and inbred populations were 3.03 and 5.21%, respectively. The trend
of inbreeding coefficient was 0.236±0.044 and significant (P<0.05). Maximum of inbreeding
coefficient was 31.25%. Effects of inbreeding on BW and KS were estimated by restricted
maximum likelihood (REML) method under 12 animal models. The most appropriate
model for each trait was determined by Akaike’s Information Criterion (AIC) test. The
regression coefficients of BW and KS on inbreeding coefficient were -0.50±1.57 gm and -
0.17±0.10 percent, respectively. The results obtained in the present study showed
inbreeding had not significant effects on BW and KS (P>0.05).

Keywords: inbreeding coefficient; birth weight; kid survival




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