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

Authors

  • AMIT KUMAR Ph. D. Scholar, Animal Genetics & Breeding, C. V. Sc., Jabalpur
  • S S TOMAR Professor, Dept. of Animal Genetics and Breeding, C. V. Sc. Mhow, NDVSU, Jabalpur
  • RAVI RAJORIYA Asst. Professor, Dept. of Animal Genetics and Breeding, C. V. Sc. Rewa, M.P.
  • HARISH SHARMA 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.

Keywords:

Age at first calving, inbreeding, Gir

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. 

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Published

2014-11-11

Issue

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

Section

Articles

How to Cite

EFFECT OF INBREEDING AND SOME OTHER FACTORS ON AGE AT FIRST CALVING IN GIR COWS . (2014). Indian Journal of Animal Production and Management, 30(3-4), 40–43. Retrieved from https://acspublisher.com/journals/index.php/ijapm/article/view/7264