A polymorphism in the insulin-like growth factor 1 gene is associated with postpartum resumption of ovarian cyclicity in Holstein-Friesian cows under grazing conditions

Table 1 Allele and genotype frequencies observed for the SNP IGF-1 / Sna BI in Holstein-Friesian cows

SNP *IGF-1/Sna* BI	UHF¹	UHFxNZHF²	Total³
allele frequencies
A	0.63	0.52	0.59
B	0.37	0.48	0.41
genotype frequencies
AA	0.33 (14)	0.28 (8)	0.31
AB	0.59 (25)	0.46 (13)	0.54
BB	0.07 (3)	0.25 (7)	0.14

UHF: Uruguayan Holstein-Friesian cows; UHFxNZHF: UHF x New Zealand Holstein-Friesian first cross cows. ^{1,2, 3} Hardy-Weinberg Equilibrium test: χ² = 2.98, P = 0.08; χ² = 0.22, P = 0.64; χ² = 0.87, P = 0.35, respectively. The number of animals per genotype is indicated in parentheses.

ISSN: 1751-0147