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This article is part of the supplement: Proceedings of the International Symposium on Animal Genomics for Animal Health (AGAH 2010)

Open Access Proceedings

Identification of parental line specific effects of MLF2 on resistance to coccidiosis in chickens

Yeong Ho Hong1, Eui-Soo Kim2 and Hyun S Lillehoj3*

Author Affiliations

1 Department of Animal Science and Technology, Chung-Ang University Gyeonggi-Do 456-756, Korea

2 Bovine Functional Genomics Laboratory, Animal and Natural Resources Institute, United States Department of Agriculture, Beltsville, MD 20705, USA

3 Animal Parasitic Diseases Laboratory, Animal and Natural Resources Institute, United States Department of Agriculture, Beltsville, MD 20705, USA

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BMC Proceedings 2011, 5(Suppl 4):S21  doi:10.1186/1753-6561-5-S4-S21

Published: 3 June 2011

Abstract

Background

MLF2 was the candidate gene associated with coccidiosis resistance in chickens. Although single marker analysis supported the association between MLF2 and coccidiosis resistance, causative mutation relevant to coccidiosis was not identified yet. Thus, this study suggested segregation analysis of MLF2 haplotype and the association test of the other candidate genes using improved data transformation.

Results

A haplotype probably originated from one parental line was found out of 4 major haplotypes of MLF2. Frequency of this haplotype was 0.2 in parental chickens and its offspring in 12 families. Allele substitution effect of the MLF2 haplotype originated from a specific line was associated with increased body weight and fecal egg count explaining coccidiosis resistance. Nevertheless Box-Cox transformation was able to improve normality; association test did not produce obvious different results compared with analysis with log transformed phenotype.

Conclusion

Allele substitution effect analysis and classification of MLF2 haplotype identified the segregation of haplotype associated with coccidiosis resistance. The haplotype originated from a specific parental line was associated with improving disease resistance. Estimating effect of MLF2 haplotype on coccidiosis resistance will provide useful information for selecting animals or lines for future study.