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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 2
First page : (1527) Last page : (1531)
Article doi: : http://dx.doi.org/10.18782/2320-7051.6572

Effect of Non-Genetic Factors on Growth Performance of Farm Bred Nellore Jodipi Sheep

B. V. Reddy, S.¹, Punya Kumari, B.², K. V. Gowri Manokari, V.³ and Venkataramanan, R.^4
1PhD scholar, NTR college of Veterinary Science,
Sri Venkateswara Veterinary University, Gannavaram, Krishna district, Andhra Pradesh, India
²Associate Professor & Head, Department of Animal Genetics and Breeding,
College of Veterinary Science, Sri Venkateswara Veterinary University, Tirupati
³PhD Scholar, Madras Veterinary College, TANUVAS, Chennai, Tamilnadu
⁴Assistant Professor, Post Graduate Research Institute for Animal Sciences,
NWPSI, Kattupakkam, TANUVAS, Tamilnadu
*Corresponding Author E-mail: bhakthavatchal@gmail.com
Received: 14.03.2018 | Revised: 20.04.2018   | Accepted: 26.04.2018  

 ABSTRACT

Recorded data on body weight (i.e. at birth, 3, 6, 9 and 12 month) of 5044 Nellore Jodipi sheep over a period of twenty three years (i.e., 1993-94 to 2015-16) were collected from the ICAR, Sheep Breeding Station, located in Palamaner, Chittoor district of Andhra Pradesh under Network Project on Sheep Improvement (NWPSI) were used to study the effect of non-genetic factors on growth traits. The average weights at birth, 3, 6, 9 and 12 months of age were 3.03 ± 0.01, 13.29 ± 0.07, 17.86 ± 0.10, 21.34 ± 0.12, 24.96 ± 0.15kg, respectively. Significant effects associated with the period of birth, parity of dam, season of birth and sex of lambs were observed on body weight at different stages of growth. An increasing trend in body weights was observed with increase in parity upto fifth parity and there after it decreased. The off season lambs achieved higher body weight for birth, 3rd, and 12th  month of age than main season lambs, where as body weights of 6th  and 9th  months lambs were higher in main season than the corresponding off season. Males were heavier than females at all stages of growth and the sex differences tended to increase with age.The significant effect of non-genetic effects on growth warrants inclusion of these factors in mixed models used for genetic evaluation and estimation of breeding values, failing which can lead to erroneous breeding values. The results of this study will be useful in suggesting suitable management plans like duration of mating, determination of marketing age etc.

Key words: Non-genetic factors, Growth traits, Genetic evaluation, Management plans, Sheep

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Reddy, B.V.S., Punya Kumari, B., Gowri Manokari, K.V.V. and Venkataramanan, R., Effect of Non-Genetic Factors on Growth Performance of Farm Bred Nellore Jodipi Sheep, Int. J. Pure App. Biosci.6(2): 1527-1531 (2018). doi: http://dx.doi.org/10.18782/2320-7051.6572