Genetic analysis for growth traits of prolific Garole × Malpura (GM) sheep
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The FecB gene of Garole sheep was introgressed into non-prolific Malpura sheep to evolve a new prolific sheep strain Garole × Malpura (GM), suitable for semi-arid conditions. The present study was conducted to evaluate the impact of breeding program on production profile of GM sheep and to estimate the genetic parameters for growth traits of GM sheep. Overall prolificacy increased significantly in the new strain as compared to the native Malpura sheep. In the GM flock of F2 and F2 onwards generation 35.31% single, 55.83% twins, 8.16% triplet and 0.70% quadruplets were obtained during lambing. Over the years, prolificacy in the flock has increased significantly. Over all least squares means for birth weight, 3, 6, 9, 12 month weight, pre-weaning gain (ADG1) and post-weaning gain (ADG2) were 1.82 ± 0.03, 9.44 ± 0.18, 14.00 ± 0.24, 16.56 ± 0.33, and 19.32 ± 0.35 kg, and 84.08 ± 1.84 and 35.19 ± 0.99 g, respectively. Majority of the fixed effects had significant influence on the performance traits. The heritability estimates for birth, 3, 6, 9, 12 month weight, ADG1 and ADG2 were 0.30 ± 0.11, 0.22 ± 0.09, 0.23 ± 0.10, 0.27 ± 0.10, 0.30 ± 0.11, 0.17 ± 0.08, and 0.17 ± 0.10, respectively. Modest rate of genetic progress seems possible for these traits under selection. The genetic and phenotypic correlations among different body weights were moderate to high and positive. The genetic correlation of pre and post-weaning daily gains with body weight traits were also high and positive.
KeywordsGarole × Malpura sheep Genetic parameters Growth traits Prolificacy
All the research workers associated with this work from the inception of idea for introgression of FecB gene in Malpura sheep till today are deeply acknowledged. Authors acknowledge the contribution of Shri Ashok Prasad for help in data management. Support provided by the Director, CSWRI Avikanagar for execution of the project is deeply acknowledged.
- Arora, A.L., Mishra, A.K., Kumar, S. and Prince, L.L.L., 2009a. Effect of crossing FecB gene carrier Garole × Malpura rams and ewes on growth performance of their progeny, Indian Veterinary Journal, 86, 212–214Google Scholar
- Arora, A.L., Mishra, A.K., Prince, L.L.L., Kumar, Sushil and Gowane, G.R., 2009b. Productivity efficiency of prolific Garole × Malpura halfbreds, Indian Veterinary Journal, 86, 217–218.Google Scholar
- Davis, G.H., Galloway, S.M., Ross, I.K., Gregan, S.M., Ward, J., Nimbkar, B.V., Ghalsasi, P.M., Nimbkar, C., Gray, C.D., Subandriyo, Inounu, I., Tiesnamurti, B., Martyniuk, E., Eythorsdottir, E., Mulsant, P., Lecerf, F., Hanrahan, J.P., Bradford, G.E. and Wilson, T., 2002. DNA tests in prolific sheep from eight countries provide new evidence on origin of the Booroola (FecB) mutation, Biology of Reproduction, 66, 1869–1874CrossRefPubMedGoogle Scholar
- Kolte, A.P., Mishra, A.K., Kumar, S., Arora, A.L. and Singh, V.K., 2005. A study on effect of carrying FecB gene on body weight in Garole and Garole x Malpura sheep, Asian-Australasian Journal of Animal Sciences, 18, 1379–1382Google Scholar
- Kumar, S., Mishra, A.K., Prince, L.L.L., Paswan, C., Arora, A.L. and Karim, S.A., 2009. Identification of the Booroola mutation in Kendrapara sheep of Orissa, India. Proceedings of the Helen Newton Turner Memorial International workshop on using the FecB (Booroola) gene in sheep breeding programs. NARI, Phaltan, Maharashtra, India, P. 206.Google Scholar
- Meyer, K., 2000. DFREML programs to estimate variance components by restricted maximum likelihood using derivative free algorithm-user notes. Animal Genetics and Breeding Unit. University of New England. Amidle NSW, Mino. p. 84.Google Scholar
- Mishra, A.K., Arora, A.L., Kumar Sushil, and Singh, V.K., 2005. Prolificacy of Garole in semi-arid tropics of Rajasthan, Indian Journal of Small Ruminants, 11, 1–5Google Scholar
- Mishra, A.K., Arora, A.L., Kumar Sushil, Gupta, D.C. and Singh, V.K., 2007. Ewe productivity efficiency of single and multiple lambs bearing of Garole, Malpura and their crossbred ewes, Indian Journal of Animal Sciences, 77, 767–772Google Scholar
- Mishra, A.K., Arora, A.L., Kumar, S., Gowane, G.R. and Prince, L.L.L., 2008. Effect of type of birth of ewes on reproductive and productive efficiency in Garole × Malpura crosses, Indian Journal of Animal Sciences, 78, 1411–1413Google Scholar
- Sharma, R.C., Arora, A.L., Mishra, A.K., Kumar, S. and Singh, V.K., 2004. Breeding prolific Garole with Malpura sheep for increased reproductive efficiency in semi-arid tropics of India, Asian-Australasian Journal of Animal Science, 17, 737–742Google Scholar
- SPSS, 2005. SPSS for Windows, Brief Guide, Version 14.0, SPSS Inc. Chicago, IL.Google Scholar