EFFECT OF INBREEDING AND SOME OTHER FACTORS ON AGE AT FIRST CALVING IN GIR COWS


120 / 32

Authors

  • Amit Kumar Corresponding author’s address:- Dr. Amit Kumar, Ph. D. scholar, R. No-38, Subhash Hostel, C. V. Sc. & A.H., NDVSU, South Civil lines, Jabalpur-482001, Madhya Pradesh
  • S.S. Tomar Professor, Dept. of Animal Genetics and Breeding, C. V. Sc. Mhow, NDVSU, Jabalpur and
  • Ravi Rojoriya Asst. Professor, Dept. of Animal Genetics and Breeding, C. V. Sc. Rewa, M.P.
  • Harish Sharma Asst. Field Vety. Officer, Gwalior,

Abstract

Effects of Inbreeding, sire, period and season on age at first calving (AFC) and its
phenotypic and genetic association with other reproductive traits viz., first service period
(FSP) and first calving interval (FCI) were studied on 191 Gir cows maintained at the
Kasturba Gandhi National Memorial Trust Dairy Farm, Kasturbagram, Indore (M.P.). The AFC
in these cows averaged 1787.46±36.11 days and was significantly (p<0.01) affected by
inbreeding. The effects due to sire, period and season were non- significant. The heritability
estimate of AFC was low (0.09±0.12) with large standard error. The phenotypic correlations
of AFC with FSP and FCI were both positive and significant (p<0.01). It was concluded that
inbreeding had deteriorating effect on the age at first calving and hence to improve the age
at first calving in this herd avoidance of inbreeding along with ameliorative managerial
practices should be adopted.

Author Biographies

  • Amit Kumar, Corresponding author’s address:- Dr. Amit Kumar, Ph. D. scholar, R. No-38, Subhash Hostel, C. V. Sc. & A.H., NDVSU, South Civil lines, Jabalpur-482001, Madhya Pradesh
    Asst. Field Vety. Officer, Gwalior, Corresponding
    author’s address:- Dr. Amit Kumar, Ph. D. scholar, R.
    No-38, Subhash Hostel, C. V. Sc. & A.H., NDVSU,
    South Civil lines, Jabalpur-482001, Madhya Pradesh
  • S.S. Tomar, Professor, Dept. of Animal Genetics and Breeding, C. V. Sc. Mhow, NDVSU, Jabalpur and
    Professor, Dept. of Animal Genetics and Breeding,
    C. V. Sc. Mhow, NDVSU, Jabalpur and
  • Ravi Rojoriya, Asst. Professor, Dept. of Animal Genetics and Breeding, C. V. Sc. Rewa, M.P.
    Asst. Professor, Dept. of Animal Genetics and
    Breeding, C. V. Sc. Rewa, M.P.
  • Harish Sharma, Asst. Field Vety. Officer, Gwalior,
    Asst. Field Vety. Officer, Gwalior,

Downloads

Submitted

13-04-2017

Published

08-05-2017

Issue

Vol. 30 No. 3-4 (2014): Indian Journal of Animal Production and Management

Section

Articles

License

Copyright lies with the publisher.

How to Cite

Kumar, A., Tomar, S., Rojoriya, R., & Sharma, H. (2017). EFFECT OF INBREEDING AND SOME OTHER FACTORS ON AGE AT FIRST CALVING IN GIR COWS. Indian Journal of Animal Production and Management, 30(3-4). https://epubs.icar.org.in/index.php/IJAPM/article/view/69504