Evaluation of genetic and phenotypic parameters growth traits in organized flock of Chokla sheep of Rajasthan
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Authors
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PRAKASH PRAKASH
Project Associate, Rajasthan University of Veterinary and Animal Sciences, Bikaner, Rajasthan 334 001 India
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S B S YADAV
Professor, Rajasthan University of Veterinary and Animal Sciences,Bikaner
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A K PATEL
Head and Principal Scientist, Rajasthan University of Veterinary and Animal Sciences,Bikaner
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H K NARULA
Principal Scientist, Rajasthan University of Veterinary and Animal Sciences, Bikaner, Rajasthan 334 001 India
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ASHISH CHOPRA
Scientist ARC- Central Sheep and Wool Research Institute, Bikaner.
Keywords:
Chokla sheep, Genetic and non-genetic factors, Genetic and phenotypic parameters, Growth traits, RajasthanAbstract
The sire effect was highly significant (P≤0.01) on all growth traits.The sex effect of lamb was highly significant (P≤0.01) on all growth traits but non-significant on 12 months body weight, period effect was highly significant (P≤ 0.01) on all growth traits but non-significant on birth weight. The effect of dam’s age was highly significant (P≤0.01) on birth weight, 3 months weight, ADG3 and nonsignificant effect for 6, 9, 12 months body weights, ADG1 and ADG2. The effect of season of birth was highly significant (P≤ 0.01) on all growth traits but non-significant effect for 12 months body weights. The effect of dam’s weight as a covariate was highly significant (P≤0.01) on birth, 3, 6, 9 months body weights and ADG1 and significant (P≤0.05) on 12 months body weights and non-significant for ADG2 and ADG3. The heritability estimates from WOMBAT (animal model 1) method for body weights and average daily gains were low to medium. Estimates of genetic correlations between body weights with weights at subsequent ages were positive and ranged from 0.065 to 0.885, and average daily gains during different phase ranged from –0.088 to 0.322. Estimates for phenotypic correlations between body weights with weights at subsequent ages ranged from 0.255 to 0.818, and average daily gains during different phase ranged from –0.22 to 0.141.Downloads
References
Arora A L, Sharma R C, Narula H K and Kumar R. 1999. Comparative performance of Avikalin and Malpura sheep. Indian Journal of Small Ruminants 5: 4–8.
Chopra A, Prince L L L, Gowane G R and Arora A L. 2010. Influence of genetic and non-genetic factors on growth profile of Bharat Merinosheep in semiarid region of Rajasthan. Indian Journal of Animal Sciences 80: 376–78.
Dass G, Sharma P R and Mehrotra V. 2008. Production performance of Marwari lambs under hot arid region of Rajasthan. Indian Journal of Animal Sciences 78: 1019–22.
Gohil G. 2010. ‘Genetic evaluation of growth and reproduction of Marwari sheep’. MVSc Thesis, Rajasthan Agricultural University, Bikaner.
Harvey W R. 1990. User’s guide for LSMLMW PC-2 Version mixed model least-squares maximum likelihood computer program. Minneograph Columbus, Ohio, USA.
Kramer C Y. 1957. Extension of multiple range tests to group correlated adjusted means. Biometrics 13: 13–18. DOI: https://doi.org/10.2307/3001898
Kushwaha B P, Kumar S, Kumar R and Mehta B S. 1997. The Chokla sheep in India. Animal Genetic Resources 22: 19–27. DOI: https://doi.org/10.1017/S1014233900000985
Mandal A, Pant K P, Nandy D K, Rout P K and Roy R. 2003. Genetic analysis of growth traits in Muzaffarnagari sheep. Tropical Animal Health and Production 35: 271–84.
Meyer K. 2007. WOMBAT—A tool for mixed model analyses in quantitative genetics by REML. Journal of Zhejiang University Science B 8(11): 815–21. DOI: https://doi.org/10.1631/jzus.2007.B0815
Narula H K, Kumar A, 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: 350–53.
Negi P R, Bhat P N and Garg R C. 1987. Factors affecting pre weaning body weights in Gaddi sheep and its crosses. The Indian Journal of Animal Sciences 57: 489–92.
Nehra K S and Singh V K. 2006. Genetic evaluation of Marwari sheep in arid zone: growth. Indian Journal of Small Ruminants 12(1): 91–94.
Reddy Y R, Naidu P T and Rao S T V. 2009. Growth performance of Nellore breed of sheep in India. Indian Journal of Small Ruminants 15(1): 118–20.
Singh G and Dhillon J S. 1992. Factors affecting body weights of Avivastra lambs. Indian Journal of Animal Sciences 62: 574– 80.
Sivakumar T, Soundararajan C, Palanidorai R, Ganeshkumar G, Mahendrans M and Malathi G. 2006. Factors affecting birthweight in Madras Red lambs. Indian Journal of Small Ruminants 12(1): 115–16.
Tomar A K S, Mehta B S and Singh G. 2000. Genetic and non- genetic factors affecting growth in Bharat merino sheep. Indian Journal of Animal Sciences 70: 647–48.
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