Evaluation of reproductive traits of Chokla sheep under semi-arid conditions of Rajasthan
Abstract views: 156 / PDF downloads: 98
https://doi.org/10.56093/ijans.v89i9.93787
Keywords:
Age at first lambing, Arid, Chokla sheep, Rajasthan, ReproductionAbstract
The study analysed the records of 1,172 ewes maintained at ICAR–Central Sheep and Wool Research Institute at Avikanagar and Bikaner, Rajasthan over a period of 22 years (1994-2016). Eight reproductive traits were assessed, namely age at first service (AFS; 572.39±6.59 days), age at first successful service (ASS; 635.71±9.36 days), age at first lambing (AFL; 773±8.77 days), weight at first service (WFS; 25.16±0.11 kg), weight at first successful service (WSS; 25.85±0.16 kg), weight at lambing (WL; 28.61±0.21 kg), lambing interval (LI;371±6.87days) and service period (SP; 228.31±6.62 days). The effects of period of birth of ewe, ewe’s birth weight and sire were significant for all the traits except LI and SP with an improvement of 17.47% –37.6% observed over the period of study. Season of birth of ewe had significant effect on AFL. AFS, ASS and AFL were significantly influenced by their respective covariates (WFS, WSS and WL). The statistically significant improvement over the periods suggest that through suitable selective breeding policy and good managemental measures, the reproductive performance of the flock can be enhanced. The optimization of ewe weights could reduce the age of sexual maturity and the ewe’s weight at birth may serve as an indicator for future performance in this regard. Selection of superior sires may improve the genetic potential of the flock with respect to the reproductive traits.Downloads
References
Akhtar P, Ali S, Hussain A, Mirza M A, Mustafa M I and Sultan J I. 2008. Heritability estimates of post weaning performance traits of Hissardale sheep in Pakistan. Turkish Journal of Veterinary and Animal Sciences 32(4): 275–79.
Babar M and Javed K. 2009. Non-genetic factors affecting reproductive traits in Lohi sheep. Acta Agriculturae Scandinavica Section A 59(1): 48–52. DOI: https://doi.org/10.1080/09064700802650035
Çilek S and Tekin M E. 2007. Environmental factors affecting milk yield traits of Brown Swiss Cows raised at Ulaº state farm and phenotypic correlations between milk yield and fertility traits. Indian Journal of Animal Sciences 77(2): 154– 57.
Çilek S. 2009. Milk yield traits of Holstein cows raised at Polatli state farm in Turkey. Journal of Animal and Veterinary Advances 8(1): 6–10.
Dass G. 2008. Characterization and evaluation of Pugal sheep in the home tract. Indian Journal of Animal Sciences 78(5): 501– 04.
Dey B and Poonia J. 2005. Factors affecting growth traits in Nali sheep. Indian Journal of Small Ruminants 11(1): 77–79.
Dixit S, Dhillon J and Singh G. 2002. Sources of variation in reproductive traits of Bharat Merino sheep. Indian Journal of Animal Sciences 72(4): 28–331.
Duncan D B. 1957. Multiple range tests for correlated and heteroscedastic means. Biometrics 13(2): 164–76. DOI: https://doi.org/10.2307/2527799
Gowane G R, Prince L L L, Paswan C, Misra S S, Sharma R C and Naqvi S M K. 2014. Genetic analysis of reproductive and fitness traits of Malpura sheep in semi-arid tropics of India. Agricultural Research 3(1): 75–82. DOI: https://doi.org/10.1007/s40003-014-0091-0
Jain A, Singh G and Yadav D K. 2009. Chokla-an endangered sheep genetic resource. Indian Journal of Animal Sciences 79(10): 1071–72.
Kinghorn B and Kinghorn S. 2003. Pedigree viewer. Armidale, Australia. University of New England.
Mandakmale S, Birari D, Shinde S and Sakhare P. 2013. Effect of non-genetic factors on reproductive performance of sangamneri strain of deccani sheep. Indian Journal of Small Ruminants 19(1): 83–84.
Mandal A, Dass G, Rout P and Roy R. 2011. Genetic parameters for direct and maternal effects on post-weaning body measurements of Muzaffarnagari sheep in India. Tropical Animal Health and Production 43(3): 675–83. DOI: https://doi.org/10.1007/s11250-010-9752-6
Mane P, Pachpute S and Nimase R. 2014. Growth and reproductive performance of Deccani sheep in an organised farm. Indian Journal of Small Ruminants 20(2): 23–27.
Narula H K, Ajay K, Ayub M and Mehrotra V. 2010. Growth rate and wool production of Marwari lambs under arid region of Rajasthan. Indian Journal of Animal Sciences 80(4): 350–53.
Pal A, Chatterjee P N, Das S, Battobyal S, Biswas P and Sharma A. 2017. Biodiversity among sheep and goat reared under different agroclimatic regions of West Bengal, India. Indian Journal of Animal Sciences 87(1): 80–86.
Poonia J. 2008. Reproductive performance of Munjal sheep. The Indian Journal of Small Ruminants 14(1): 121–23.
SAS Institute. 2011. SAS/IML 9.3 User’s guide. Sas Institute.
Downloads
Submitted
Published
Issue
Section
License
The copyright of the articles published in The Indian Journal of Animal Sciences is vested with the Indian Council of Agricultural Research, which reserves the right to enter into any agreement with any organization in India or abroad, for reprography, photocopying, storage and dissemination of information. The Council has no objection to using the material, provided the information is not being utilized for commercial purposes and wherever the information is being used, proper credit is given to ICAR.