Abstract
The Network Project on Sheep Improvement (NWPSI)–Madras Red field unit is a group breeding scheme involving 198 farmers’ flocks of Madras Red sheep in which selection for growth traits and rotation of rams have been practised for over two decades. Growth data collected from these flocks were used to evaluate the performance and understand the direct and expected responses to selection based on genetic parameters. The body weight at birth (BW), weaning weight (WW), 6-month weight (6W), 9-month weight (9W), 12-month weight (YW), pre-weaning average daily gain (ADG1, birth to 3 months), post-weaning ADG2 (3–6 months), ADG3 (6–9 months), ADG4 (9–12 months) and ADG5 (3–12 months) were 2.67, 10.05, 14.56, 18.36, 21.36, 80.13, 49.05, 43.00, 34.21 and 41.18 g, respectively. Univariate analyses were carried out using animal and sire models to estimate variance components. Heritability obtained from animal model for BW was 0.36 and the values for other body weight traits were almost unity. Heritability estimate for pre-weaning ADG1 was 0.31. Very high genetic variability was observed in spite of long-term selection and this sustenance of variability is one of the main advantages of a group breeding scheme, combining several flocks of smaller size. An increasing genetic and phenotypic trend was noticed for almost all the traits studied. The expected responses calculated based on genetic parameters also indicated scope for improvement.
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References
Acharya, R.M., 1982. Sheep and Goat Breeds of India. FAO Animal Production and Health Paper, No: 30, FAO, Rome, Italy.
Ahmad, M., Singh, C.V., Sharma, R.K., Sushil Kumar and Arora, A.L., 2005, Comparison of different methods of heritability estimates for body weights and wool yield traits in Avikalin sheep. Indian Journal of Small Ruminants, 11(2) : 121–126.
Arora, A.L., Gowane, G.R., Prince L.L.L. and Prakash, V., 2010. Genetic trends for performance traits of Malpura sheep. Indian Journal of Animal Sciences, 80, 937–939.
Balasubramanyam, D. and Kumarasamy, P., 2011. Performance of Madras Red sheep in Kancheepuram District. Indian Journal of Fundamental and Applied Life Science, 1, 133–137.
Balasubramanyam, D., Raja, T.V., Kumarasamy, P. and Sivaselvam, S.N., 2012. Estimation of genetic parameters and trends for body weight traits in Madras Red sheep. Indian Journal of Small Ruminants, 18: 173–179.
Burfening, P.J. and Kress, D.D., 1993. Direct and maternal effects on birth and weaning weight in sheep. Small Ruminants Research, 10(2), 153–163.
Cloete, S.W.P., Schoeman, S.J., Coetzee, J. and Morris, J.D., 2001. Genetic variances for live weight and fleece traits in Merino, Dohne Merino and South African Meat Merino sheep. Australian Journal of Experimental Agriculture, 41: 145–153.
Devendran P., Cauveri, D., Murali, N. and Kumarasamy, P., 2014. Growth profile of Madras Red sheep in farmer’s flocks. Indian Journal of Small Ruminants, 20(1), 20–23.
Ekambaram, B., Alexander, G. and Chakravarthi, M.K., 2013. Performance of Nellore sheep (Jodipi) under farm conditions. Indian Veterinary Journal, 90(12), 35–37.
Farokhad, M. L., Beigi Nassiri, M.T., Roshanfekr, H., Fayazi, J. and Mamouei, M., 2010. Genetic parameters for direct and maternal effects on growth traits of Arman lambs, Research Journal of Biological Sciences, 5 (1), 71–74.
Ganesakale, D. and Rathnasabapathy, V., 1973. Sheep breeds of Tamil Nadu. Cheiron, 2, 146–155.
Ganesan, R., Dhanavanthan, P.,Balasubramanyam, D., Kumarasamy, P. and Kiruthika, D., 2013. Estimation of genetic parameters of growth traits in Madras Red sheep. IOSR Journal of Agricultural and Veterinary Science, 3(5), 69–73.
Jeichitra, V., 2009. Genetic Analysis of Growth Traits in Mecheri Sheep. Ph.D. Thesis submitted to the Tamil Nadu Veterinary and Animal Sciences University, Chennai.
Joshi, R.K., Narula, H.K., Singh, H. and Chopra, A., 2014. Heritability estimates of growth traits in Magra sheep. Indian Journal of Small Ruminants, 20: 109–111.
Meyer, K., 1998. Estimating covariance functions for longitudinal data using random regression model. Genetic Selection and Evolution, 30, 221–240.
Meyer, K., 2007. WOMBAT—A tool for mixed model analyses in quantitative genetics by restricted maximum likelihood (REML). Journal of Zhejiang University Science, 8, 815–821.
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.
Raman, K.S., Sundararaman, M.N., Haribhaskar, S. and Ganesakale, D., 2003. Biometrics and breed characteristics of Madras Red sheep. Indian Journal of Small Ruminants, 9, 6–9.
Rani, 2012. Genetic studies on the performance on Nellore sheep. M.V.Sc thesis submitted to Sri Venkateswara Veterinary University, Tirupati.
Reddy VV, D., Sreenivas, D., Gnanaprakash, M. and Harikrishna, Ch., 2017. Genetic analysis of growth performance of Nellore Brown sheep. International Journal of Science, 6(1), 774–778.
Weller J. I., 2009. Quantitative Trait Loci Analysis in Animals, 2nd edition. Published by CABI Publishing, United Kingdom.
Acknowledgements
The authors thank the Indian Council of Agricultural Research (ICAR)–Network Project on Sheep Improvement for providing the data used for this study. They also thank the Director, Centre for Animal Production Studies, TANUVAS, Chennai, for providing permission to carry out the research and the Dean, Madras Veterinary College, Chennai, for facilities provided.
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Arthy, V., Venkataramanan, R., Sivaselvam, S.N. et al. Genetic evaluation of growth in farmers’ flocks of Madras Red sheep under long-term selection in a group breeding scheme. Trop Anim Health Prod 50, 1463–1471 (2018). https://doi.org/10.1007/s11250-018-1581-z
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DOI: https://doi.org/10.1007/s11250-018-1581-z