Indian Journal of Animal Research

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Research Article

Indian Journal of Animal Research, volume 52 issue 10 (october 2018) : 1389-1394

Study of sire selection in view of genetic relation involving fitness traits in Malpura sheep in an organized farm of Rajasthan, India

Govind Mohan, G.R. Gowane, Arun Kumar, A.K. Chakravarthy
1Department of Animal Genetics and Breeding, ICAR-National Dairy Research Institute. Karnal-132 001, Haryana, India.
Cite article:- Mohan Govind, Gowane G.R., Kumar Arun, Chakravarthy A.K. (2017). Study of sire selection in view of genetic relation involving fitness traits in Malpura sheep in an organized farm of Rajasthan, India. Indian Journal of Animal Research. 52(10): 1389-1394. doi: 10.18805/ijar.B-3397.

ABSTRACT

The genetics of fitness traits, viz. replacement rate (RR) and selective value (SV) were studied in the flock of Malpura Sheep along the production parameters of the animals. The study was carried out on 10 years records for 2307 lambing sired by 187 sires. Sire wise incidence of replacement traits was as follows: abnormal birth (0.30%), sex ratio (49.98%), mortality (17.26%), culling (15.37%), RR on total lamb basis (33.98%) and RR on female lamb basis (68.44%). The selective value or adaptive value for the flock was 1.37. Sire did not affect abnormal birth, mortality, culling and SV significantly, whereas sire significantly affected sex ratio, and RR on total female lambs born basis. Ranking of the sires for selective value was incoherent with the ranking for production parameters such as age at first service, age at first lambing, weight at first service, productive flock life and longevity. Study indicated that the selection of sires for SV would not bring desired correlated change on any of the production parameter of the animals.

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