Vol. 9, Issue 1, Part R (2024)

Author(s): Akhilesh Pandey, MS Thakur, DS Gonge and Y Pandey

Abstract: This study aimed to investigate the genetic variants and their correlation with milk production traits in Nimari cattle of Madhya Pradesh at αS2 casein gene (CSN1S2) locus. Daily Milk yield showed that there was a positive and highly significant correlation with milk yield of both AA and AB genotype of αs2-casein gene in Nimari cow. Lactation length showed Positive and significant correlation with milk yield (MY) but significant and negative correlation with daily milk yield trait in AA genotypes. Whereas AB genotypes showed non-significant but negative correlation with milk yield and daily milk yield of Nimari cow. In AA genotype of Nimari cow, Fat % showed significant but negative correlation with milk yield) and lactation length whereas in AB genotype Fat % also showed high and significantly negative correlation with both milk yield daily milk yield trait and Lactation length of Nimari cow. In AA genotype of Nimari cow, Fat % showed significant but negative correlation with milk yield and lactation length whereas in AB genotype Fat % also showed significantly negative correlation with both milk yield daily milk yield trait and Lactation length of Nimari cow. Milk protein of AA genotype showed non-significant and negative correlation with Milk yield Daily milk yield and Lactation length but non-significant and positively correlated with Fat % whereas Significant but negative correlation noticed between milk protein of AB genotype of Nimari cow and Fat % and remaining traits Milk yield and daily milk yield showed non-significant and positive correlation with Protein. Highly significant and positive correlation noticed between lactose and milk protein whereas lactose showed non – Significant but positive correlation with Milk yield and Daily Milk Yield and Lactation length. AA genotype of Nimari cow milk SNF showed non – Significant but negative correlation with Milk yield and lactation length (-0.17) whereas, Fat % Protein and lactose are showed highly significant and positive correlation with SNF. SNF of AB genotype in Nimari breed cow showed Highly significant and positive correlation with Fat % and lactose whereas with rest trait SNF showed non- significant correlation. Non-significant and negative correlation showed by milk density with Milk yield Lactation length and SNF. Milk density of AB genotype of Nimari cow showed highly significant and positive correlation with milk protein Lactose SNF and milk yield whereas milk density showed negative but non-significant correlation with Fat %.