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Published on: October 25, 2015
A genome-wide association study revealed five SNPs affecting 8-month weight in sheep
M Pasandideh1, M Gholizadeh1, G Rahimi-Mianji1
1Department of Animal Science, Faculty of Animal and Aquatic Sciences, Sari Agricultural Sciences and Natural Resources University, PO Box 578, Sari, Iran.
Abstract:
Lamb weight at 8 months of age is an important trait in the sheep industry in terms of the onset of puberty around this age; however, knowledge of its effective genetic factors is limited. Therefore, a GWAS using the 50K SNP-Chip was performed on 96 Baluchi sheep to identify the genomic regions associated with 8-month weight. The results of the present study revealed five SNPs on chromosomes 4, 14 and 16 at 5% chromosome-wide significance level, jointly accounting for 0.95% of total genetic variance. Four genes - MTPN, HYDIN, LRGUK and ZFP90 - were found in 50 kb intervals around the significant SNPs, of which MTPN is involved in regulation of skeletal muscle growth. Our results may provide a new vision to identify the genomic regions affecting growth traits in sheep.
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