Factors affecting weight and age at first calving, first lactation milk yield in Gir cows

DOI: 10.18805/ijar.8415    | Article Id: B-2954 | Page : 804-807
Citation :- Factors affecting weight and age at first calving, first lactation milk yield in Gir cows .Indian Journal Of Animal Research.2016.(50):804-807

Basdev Singh1, Pushkraj Sawant*, Dhruvaraj Sawant2,Sachin Todkar 3, Richa Jain4 

sawantpushkraj@gmail.com
Address :

Kasturba Gram Dairy Farm, Indore-452 020, India

Submitted Date : 23-02-2015
Accepted Date : 5-08-2015

Abstract

The present study was undertaken on data of 113 Gir cows maintained at Kasturba Gram Dairy Farm, Indore, Madhya Pradesh, India over a period of 18 years from 1995 to 2012, based on age at first calving. The overall means for weight at first calving (WFC), age at first calving (AFC), and first lactation milk yield (FLMY) were 402.22± 1.28 kg, 1709.04± 51.92 days and 1664.95± 280.72 litres respectively. The heritability estimates for WFC, AFC and FLMY were 0.248± 0.234, 0.307± 0.206 and 0.112± 0.252 respectively. The genetic correlation between WFC and AFC was positive and significant, while it was negative in between WFC and FLMY. The genetic correlation between AFC and FLMY was low and negative. The phenotypic correlations between all traits were positive.

Keywords

Age at first calving First lactation milk yield Gir cow Heritability Weight at first calving.

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