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Magee, D.A., Berry, D.P., Berkowicz, E.W., Sikora, K.M., Howard, D.J., Mullen, M.P., Evans, R.D., Spillane, C., and MacHugh, D.E.
2011
January
Journal Of Heredity
Single nucleotide polymorphisms within the bovine DLK1-DIO3 imprinted domain are associated with economically important production traits in cattle
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Optional Fields
association Bos callipyge DLK1-DIO3 domain genetic imprinting single nucleotide polymorphism OVINE CALLIPYGE LOCUS CARCASS TRAITS POLAR OVERDOMINANCE MUSCLE HYPERTROPHY TRANS-INTERACTION IGF2 EXPRESSION PHENOTYPE MUTATION GROWTH
102
94
101
Previous studies show that DNA sequence variation within the mammalian DLK1-DIO3 imprinted domain influences production traits in domestic livestock, most notably the ovine callipyge phenotype. We assessed genotype-phenotype associations between 7 single nucleotide polymorphisms (SNPs) within the orthologous bovine DLK1-DIO3 domain and performance traits in 848 progeny-tested Holstein-Friesian dairy sires. One SNP (MEG3_01) located proximal to the maternally expressed 3 (MEG3/Gtl2) gene was associated with milk yield, subcutaneous fat levels, and progeny carcass conformation (P < 0.01) and also tended to be associated with milk fat and protein yield (P < 0.10). A single SNP (CLPG_01) within the putative CLPG1 locus was associated with progeny carcass fat (P < 0.05), whereas a single SNP (PEG11_01) located proximal to the paternally expressed 11 (PEG11/Rtl) gene was associated with progeny carcass weight (P < 0.05). The MEG3_01 SNP together with an additional 2 SNPs (MEG8_01 and MEG8_02) located proximal to the putative maternally expressed 8 (MEG8/Rian) ortholog were associated (P < 0.05) with perinatal mortality. Finally, one SNP (MEG3_03) was associated (P < 0.05) with gestation length, whereas both the CLPG_01 and MEG8_01 SNPs also tended to be associated with calving interval (P < 0.10). Linkage disequilibrium analysis suggests that some phenotypic associations observed at these loci are independent. To our knowledge, this is one of the first studies demonstrating associations between the bovine DLK1-DIO3 domain and milk, carcass, fertility and, health traits in cattle. This imprinted domain may serve as a potential target for future genetic selection strategies.
DOI 10.1093/jhered/esq097
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