INTERNATIONAL JOURNAL OF PURE & APPLIED BIOSCIENCE
ISSN : 2320-7051
International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 5
First page : (1068) Last page : (1072)
Article doi: : http://dx.doi.org/10.18782/2320-6758
Genetic Analysis of Age at First Calving in Graded Sahiwal Cows in the Field Conditions of Jharkhand State of India
S. K. Bansal, K. G. Bhave, T. V. Shirsath*, S. A. Joshi, Marimuthu S. and J. R. Khadse
BAIF Central Research Station Uruli Kanchan, Pune, Maharashtra State Pin 412 202
*Corresponding Author E-mail: email@example.com
Received: 1.08.2018 | Revised: 30.08.2018 | Accepted: 7.09.2018
Age at first calving is consider an important trait as it has direct correlation with both reproductive and productive performance of an animal. Present study was conducted to estimate the effect of birth year and birth season on age at first calving for 1282 F1 progenies born out of 6 Sahiwal breed sires during the period of four years from 2008 to 2011 spread over 19 districts of Jharkhand state. The data related to F1 progenies from Jharkhand state was collected through BAIF Cattle Breeding Centres. The least square mean of age at First Calving was estimated to be 1380.99±7.19 days. The least squares analysis revealed significant effect (P<0.01) of Agro climatic Zone, Birth Year and Birth season on age at First Calving. Using restricted maximum likelihood method, the heritability estimate of age at first calving was found to be 0.048 ± 0.001. It was concluded that for lowering the age at first calving in graded Sahiwal cows, better management practises are essential, as there was little scope of genetic improvement by selection.
Key words: Sahiwal cattle, Age at first calving (AFC), Heritability.
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Bansal, S.K., Bhave, K.G., Shirsath, T.V., Joshi, S.A., Marimuthu, S., Khadse, J.R., Genetic Analysis of Age at First Calving in Graded Sahiwal Cows in the Field Conditions of Jharkhand State of India, Int. J. Pure App. Biosci.6(5): 1068-1072 (2018). doi: http://dx.doi.org/10.18782/2320-7051.6758