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Estimation of Genetic Parameters for Reproductive Traits in Yorkshire  

Song, Kwang-Lim (Division of Applied Life Science(Insti. of Agric. & Life Sci.) Gyeongsang National Univ.)
Kim, Byeong-Woo (Division of Applied Life Science(Insti. of Agric. & Life Sci.) Gyeongsang National Univ.)
Roh, Seung-Hee (Hanwoo Improvement Center NACF)
Sun, Du-Won (Division of Applied Life Science(Insti. of Agric. & Life Sci.) Gyeongsang National Univ.)
Kim, Hyo-Sun (National Institute of Animal Science, R.D.A.)
Lee, Deuk-Hwan (Dept. of Animal Life Science, Hankyong National University)
Jeon, Jin-Tae (Division of Applied Life Science(Insti. of Agric. & Life Sci.) Gyeongsang National Univ.)
Lee, Jung-Gyu (Division of Applied Life Science(Insti. of Agric. & Life Sci.) Gyeongsang National Univ.)
Publication Information
Journal of agriculture & life science / v.44, no.5, 2010 , pp. 55-64 More about this Journal
Abstract
This study was conducted to estimate genetic parameters for reproductive traits using multivariate animal models in Yorkshire breed. For the study, 4,989 records for litter traits collected between the year 2001 and 2005 from Yorkshire pigs in K GGP were used. The effects of environmental factors such as farrowing year, parity, weaning to estrus interval (WEI), and suckling period were statistically significant (p<0.05), but farrowing season was not significant, for reproductive traits. The estimates genetic correlations and phenotypic correlations in total number of born and number of suckling, was shown to highly correlated. The genetic correlations were higher than phenotypic correlation. The estimates of heritabilities for reproductive traits, considering permanent environment effects (PE) were much lower than those obtained when permanent environment effects were not considered (NPE) in the model. The estimates of heritabilities were 0.240 and 0.076 for total number of born and 0.187 and 0.096 for number of suckling in NPE, and PE, respectively. These results itivcate that PE should be considered in the statistical mode to estimate more acco ate breeding values.
Keywords
Reproductive Traits; Genetic parameter; Heritability; Genetic Correlation; Swine;
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