Estimation of genetic, phenotypic and environmental trends for production and reproduction traits in a flock of Corriedale sheep
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Authors
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M A BABA
Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Jammu and Kashmir 190 006 India
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T A S GANAI
Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Jammu and Kashmir 190 006 India
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M A RATHER
Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Jammu and Kashmir 190 006 India
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A HAMADANI
Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Jammu and Kashmir 190 006 India
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S SHANAZ
Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Jammu and Kashmir 190 006 India
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SAFEER ALAM
Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Jammu and Kashmir 190 006 India
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NUSRAT N KHAN
Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Jammu and Kashmir 190 006 India
Keywords:
Corriedale, Environmental trends, Genetic-trends, Phenotypic trend, Sheep, Traits`Abstract
The aim of the present study was to estimate genetic, phenotypic and environmental trends for birth weight (BW), weaning weight (WW), six months body weight (W6), yearling body weight (W12) and age at first lambing (AFL). The genetic trends (gm), respectively, for BW, WW, W6 and W12 were 8, 44.22, 8.05 and 29.45 whereas for AFL it was –0.03 (day/year). The phenotypic trends (gm), respectively for BW, WW, W6 and W12 were –1.3, 36.06, –30.77 and 32.90 whereas for AFL it was 4.39 (day/year). The environmental trends (gm / year) respectively for BW, WW, W6, W12 were –9.3, –8.2, –38.83 and 3.45 whereas for AFL it was –4.36 (day/year). Positive and statistically significant genetic trends were recorded for all studied body weight traits whereas for AFL it was nonsignificant. Phenotypic trends for all the traits under study were statistically non-significant.
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References
Arora A L, Gowane G R, Prince L L L and Ved P. 2010. Genetic trends for performance traits of Malpura sheep. Indian Journal of Animal Sciences 80(9): 937–39
El-Wakil S I and Elsayed M. 2013. Genetic, phenotypic and environmental trends towards improving body weight in Barki sheep. Egyptian Journal of Sheep and Goat Sciences 2(8): 11–20. DOI: https://doi.org/10.12816/0005043
Hamadani A, Ganai N A, Khan N N, Shanaz S and Ahmad T. 2019. Estimation of genetic, heritability, and phenotypic trends for weight and wool traits in Rambouillet sheep. Small Ruminant Research 177(2019): 133–40 DOI: https://doi.org/10.1016/j.smallrumres.2019.06.024
Harville D A and Hendeason C R. 1966. Environmental and genetic trends in production and their effect on sire evaluation. Department of Animal Husbandry Cornell University, Ithaca, New York.
Henderson C R, 1975. Best linear unbiased estimation and prediction under a selection model. Biometrics 31: 423–47. DOI: https://doi.org/10.2307/2529430
Lax J, Chapman A B, Pope A L, Baker R L and Bradley B P. 1979. Comparison of single trait and index selection in sheep. Journal of Animal Science 48: 776–88. DOI: https://doi.org/10.2527/jas1979.484776x
Mokhtari M S and Rashidi A. 2010. Genetic trends estimation for body weights of Kermani sheep at different ages using multivariate animal models. Small Ruminant Research 88: 23–26. DOI: https://doi.org/10.1016/j.smallrumres.2009.11.003
Rather M A, Shanaz S, Ganai N A, Bukhari S, Hamadani A, Khan N N, Yousuf S, Baba A, Raja T A and Khan H M. 2019. Genetic evaluation of wool traits of Kashmir Merino sheep in organized farms. Small Ruminant Research 177(2019): 14–17. DOI: https://doi.org/10.1016/j.smallrumres.2019.06.003
Shaat I, Galal S and Mansour H. 2004. Genetic trends for lamb weights in flocks of Egyptian Rahmani and Ossimi sheep. Small Ruminant Research 51: 23–28. DOI: https://doi.org/10.1016/S0921-4488(03)00185-8
Shrestha J N B, Peters H F, Heaney, D P and Van Vleck L D. 1996. Genetic trends over 20 years of selection in three synthetic Arcotts, Suffolk and Finnish Landrace sheep breeds for early growth traits. Canadian Journal of Animal Science 76: 23–34. DOI: https://doi.org/10.4141/cjas96-004
Singh G and Dhillon J S. 1992. Estimation of genetic trends in a closed flock of Avivastra sheep. Indian Journal of Animal Sciences 61: 617–19.
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