Correlations between the milk production traits in different variants of k-casein gene in Malvi, Nimari, Sahiwal and HF crossbred cattle

Abstract

The association study was carried out in 50 HF Crossbred, 50 Sahiwal, 50 Malvi and 50 Nimari cow in the department of Animal Genetics and Breeding of College of Veterinary Science and A.H, Jabalpur. The above mention study showed that the correlation of daily milk yield (DMY) lactation length with milk yield, SNF with fat %, and density with protein and lactose was found to be highly significant for AA and AB genotypes of k-casein gene of HF crossbred but among rest traits they showed non-significant correlation. Sahiwal breed showed significant and positive correlation between daily milk yield (DMY) lactation length with milk yield, lactose, SNF, density with protein, fat and SNF whereas significantly negative correlation also noticed in the milk yield with fat %, lactation length with daily milk yield and SNF with lactation length. Malvi breed showed that the significant and positive correlation of daily milk yield (DMY) lactation length with milk yield, protein % with milk yield and daily milk yield (DMY), and protein % with lactose, SNF and density of the milk. Whereas significantly negative correlation noticed between the fat % and daily milk yield (DMY) in AB genotype of. The AA genotype of Nimari breed showed significantly positive correlation of Milk yield (MY) with daily milk yield (DMY), protein with lactose, SNF and density whereas significantly negative correlation observed in Milk yield (MY) and protein with fat % but remaining traits showed non-significant correlation with each other. In AB genotype of Nimari breed showed significantly positive correlation of Milk yield (MY) with daily milk yield (DMY), density with protein % and SNF with lactose, whereas significantly negative association observed in fat % with Milk yield (MY) and daily milk yield (DMY), lactation length with daily milk yield (DMY) and remaining traits expressed non-significant relation.