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http://dx.doi.org/10.5187/JAST.2012.54.5.337

Evaluation of the Degrees of Genetic Connectedness Among Duroc Breed Herds  

Cho, Chungil (National Institute of Animal Science, RDA)
Choi, Jaekwan (National Institute of Animal Science, RDA)
Park, Byoungho (National Institute of Animal Science, RDA)
Kim, Sidong (National Institute of Animal Science, RDA)
Kwon, Ohsub (National Institute of Animal Science, RDA)
Choi, Youlim (National Institute of Animal Science, RDA)
Choy, Yunho (National Institute of Animal Science, RDA)
Publication Information
Journal of Animal Science and Technology / v.54, no.5, 2012 , pp. 337-340 More about this Journal
Abstract
The genetic connectedness between herds is an essential requirement to make robust across-herd estimation of the breeding values of the animals. In this study, genetic connectedness between herds was evaluated by a connectedness rating method. A total of 24,971 records of days to 90 kg (D90KG) of the pigs on performance testing programs collected from six herds (labeled from 'A' to 'F') of Duroc breed along with pedigree information comprising 456,697 families were used. Results showed that a total of eight boars were used for semen exchange programs among participant farms. Herds 'A' through 'E' were found strongly connected among them. But 'F' herd was genetically connected strongly only with 'A' herd. The highest average connectedness rating was 91.7% between 'A' herd and 'C' herd. The lowest average connectedness rating was 65.1% between 'D' and 'F'. The concept of a single genetic group comprising six Duroc herds studied is meaningful due to high connectedness rates among them. Therefore, with this high genetic ties between participant Duroc farms, the more accurate genetic evaluation would be possible.
Keywords
Connectedness rate; Across-herd genetic evaluation; Duroc; Pig;
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  • Reference
1 Boik, R. J., Tess, M. W. and Todd, C. 1993. Technical note: computing tests of fixed effects in a restricted class of mixed models. J. Anim. Sci. 71:51-56.
2 CBD. 1992. As defined in the Convention on Biological Diversity. Rio de Janeiro, 5 June 1992.
3 Golden, B. L., Snelling, W. M. and Mallinckrodt, C. H. 1992. Animal Breeder's Tool Kit. User's Guide and Reference Manual. Colorado State University. Ft. Collins, CO. U.S.A.
4 Kennedy, B. W. and Trus, D. 1993. Considerations on genetic connectedness between management units an animal model. J. Anim. Sci. 71:2341-2352.   DOI
5 Mathur, P. K. 2005. Importance of connectedness between herds for effective across herd genetic evaluation. J. South China Agric. Univ. 26:61-71.
6 Mathur, P. K., Sullivan, B. P. and Chesnais, J. 1998. Estimation of the degree of connectedness between herds or management groups in the Canadian swine population. Canadian centre for swine improvement, Ottawa, Canada.
7 Misztal, I. 2001. BLUPF90 family of programs. http://nce.ads.uga.edu/-ignacy.
8 Sun, C. Y., Wang, C. K., Wang, Y. C., Zhang, Y. and Zhang, Q. 2009. Evaluation of connectedness between herds for three pig breeds in China. Animal. 3:482-485.   DOI   ScienceOn
9 Xiao. W., Ding, X., Wang, C., Wang, Y. and Zhang, Y. 2010. The connectedness on large white and landrace in regional joint breeding system in Beijing. Journal of Animal and Veterinary Advances. 9:2338-2342.   DOI
10 Zhang, H., Liu, X. L., Wang, C., Li, J. and Yao-Sheng, C. 2004. Study on the measures of connectedness between herds. Agric. Sci. China. 3:143-148.