Influence of genetic and non genetic factors on growth traits of Bharat Merino sheep in sub-temperate climate of Kodai hills of Tamil Nadu, India

DOI: 10.18805/ijar.10979    | Article Id: B-3076 | Page : 365-370
Citation :- Influence of genetic and non genetic factors on growth traits of Bharat Merino sheep in sub-temperate climate of Kodai hills of Tamil Nadu, India .Indian Journal Of Animal Research.2017.(51):365-370

P.K. Mallick, R. Pourouchottamane, S Rajapandi, S.M.K. Thirumaran, R Venkataraman1 , G.Nagarajan, G. Murali and A.S. Rajendiran 

pkvetsrrc@gmail.com
Address :

Southern Regional Research Centre, ICAR- Central Sheep and Wool Research Institute, Mannavanur, Kodaikanal – 624 103, Tamil Nadu, India.

Submitted Date : 22-07-2015
Accepted Date : 3-03-2016

Abstract

In the present study, the data on 1649 Bharat Merino (BM) lambs; progeny of 144 sires over the year from 2000 to 2014 available at Southern Regional Research Centre (SRRC), Central Sheep and Wool Research Institute, Mannavanur were considered for the analysis. The different economic growth traits used for the analysis were birth weight (BWT), weaning weight (3MWT), 6 month weight (6MWT), 12 month weight (12MWT) and greasy fleece yield (GFY). The overall least-square means for weights (in kg) were 3.28±0.02, 19.08±0.23, 25.00±0.35, 34.79±0.59 and 2.13±0.07 for BWT, 3MWT, 6MWT, 12MWT and GFY respectively. Different non genetic factors such as year, sex, type of birth and dam’s age had significant (P<0.01) influence on BWT and 3MWT. Season influenced the BWT (P<0.05) while it had no significant effect on 3MWT. Six month weight was also significantly (P<0.05) influenced by all non-genetic factors taken under present study. Twelve month weight was significantly affected by year (P<0.01), sex and season (P<0.05). Similarly, analysis of variance showed that the year, sex of the lambs (P<0.01) and season (P<0.05) were important sources of variation on GFY of Bharat Merino sheep. Lambs born single had higher values of BWT and 3MWT than that of the lambs born as twins. The trend of the increase in BWT and 3MWT of the lambs is being observed up to the period when the age of their corresponding dams is 4-5 years. The findings of the present study showed that non - genetic factors play an important role in the expression of genetic potential in the lambs as well as growth performance of Bharat Merino sheep under sub temperate conditions of Kodai hills of Tamil Nadu, India. The genetic parameters estimated of 6MWT indicate that it is most suitable for use as selection criterion. Improvement of body weight of BM sheep seems feasible in selection programs, as some of the related traits are moderately heritable and those traits specially are well correlated, which could suggest that these traits are useful in selection programs.

Keywords

Bharat Merino sheep Genetic Correlation Genetic factors Heritability Non-genetic factors.

References

  1. Abbasi, M.A., Abdollahi-Apanahi, R., Maghsoudi, A., VaezTorshizi, R. and Nejati-Javaremi, A. (2012). Evaluation of models for estimation of genetic parameters and maternal effects for early growth traits of Iranian Baluchi sheep. Small Rumin. Res., 104: 62-69.
  2. Al-Shorepy S.A. (2001). Estimates of genetic parameters for direct and maternal effects on birth weight of local sheep in United Arab Emirates. Small Rumin. Res. 39:219-224
  3. 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 Merino sheep in semi-arid region of Rajasthan. Indian J. Anim. Sci. 80: 376-378
  4. Dass, G., Rout, P.K. and Singh, S.K. (2014). Production performance of Muzaffarnagari sheep in organised flocks. National seminar on prospects and challenges in small ruminant production in India. pp: 93. 
  5. Das, A.K., Chakraborty, D., Kumar, N., Gupta, P., Khan, N.N. and Bukhari, S. (2014). Effects of non-genetic factors on performance traits of Kashmir Merino sheep. Indian J. Anim Res. 48:106-108
  6. Dey, B. and Poonia, J.S. (2005). factors affecting growth traits in Nali sheep. Indian J. Small Rumin., 11:77-79
  7. Dixit, S.P., Dhillon, J.S. and Singh, G. (2001). Genetic and non genetic parameter estimates for growth traits of Bharat Merino lambs. Small Rumin. Res. 42:101-104 
  8. Dixit, S.P., Singh, G. and Dhillon, J.S. (2011). Genetic and environmental factors affecting fleece traits in Bharat Merino Sheep. Indian J. Anim. Sci. 81: 80-83.
  9. El-Awady, H.G., Oudah, E.Z.M., Shalaby, N.A., El-Arian, M.N. and Metawi, H.R. (2011). Genetic improvement study on pre-weaning body weight of Egyptian Rahmani lambs under a pure breeding production system. Options Méditerranéennes. 100: 311-316.
  10. Jafaroghli, M., Rashidi, A., Mokhtari, M.S. and Shadparvar, A.A. (2010). (Co) Variance components and genetic parameters estimate for growth traits in Moghani sheep. Small Rumin. Res. 91: 170-177.
  11. Kramer, C.Y. (1957). Extension of multiple range test to group-correlated adjusted means. Biometrics. 13:13-18
  12. Kushwaha, B.P., Singh, G., Arora, A.L. and Bohra, S.D.J. (1996). Selection indices in Chokla sheep. Ind. J. Anim. Sci. 66: 296- 297.
  13. Mandakmale, S.D., Pandhare, V.S. and Birari, D.R. (2014). Studies on non - genetic factors affecting growth performance of Madgyal sheep. National seminar on prospects and challenges in small ruminant production in India.pp:73
  14. Matika, O., Van-Wky, J.B., Erasmus, G.J. and Baker, R.L. (2003). Genetic parameter estimates in Sabi sheep. Livestock Prod. Sci. 79: 17-28.
  15. Meyer. K. (2007). WOMBAT software
  16. Miraei, A.S.R., Seyedalian, S.A.R. and Shahrbabak, M.M. (2007). Variance components and heritabilities for body weight traits in Sangsari sheep, using univariate and multivariate animal models. Small Rumin. Res. 73:109-114.
  17. Mousa, E., Shaat, I. and Melak, SH. A. (2010). Phenotypic and genetic variation in lambs’ growth using Linear models. Egyptian Sheep and Goat Sci. 6: 22-33.
  18. Mousa, E., Monzaly, H., Shaat, I. and Ashmawy, A. (2013). Factors affecting birth and weaning weights of native farafra lambs in upper Egypt. Egyptian sheep and Goat Sci. 8: 1- 10.
  19. Negi, P.R., Bhat, P.P. and Garg, R.C. (1987). Factors affecting pre-weaning weights in Gaddi sheep and its crosses. Indian J. Anim. Sci. 57:489-492.
  20. Nehera, K.S. and Singh, V.K. (2006). Genetic evaluation of Marwari sheep in arid zone Indian J. Small Rumin. 12:91-94.
  21. Petrovic, M.P., Muslic, D.R., Petrovic, V.C. and Maksimovic, N. (2011). Influence of environmental factors on birth weight variability of indigenous Serbian breeds of sheep. African J. Biotech., 10: 4673-4676.
  22. Prakash, V., Prince, L.L.L., Gowane, G.R. and Arora, A.L. (2012). The estimation of (co) variance components and genetic parameters for growth traits and Kleiber ratios in Malpura sheep of Indian J. Small Rumin. Res., 108: 54-58.
  23. Rashidi, A., Mokhtari, M.S., Safi-Jahanshahi, A. and Abadi, M.R.M. (2008). Genetic parameter estimates of pre-weaning growth traits in Kermani sheep. Small Rumin. Res., 74:165-171.
  24. Roshanfekr, H., Mamouei, M., Mohammadi, K. and Rahmatnejad, E. (2011). Estimation of Genetic and Environmental Parameters Affected Pre-Weaning Traits of Arabi Lambs. Anim. Vet. Adv., 10: 1239-1243.
  25. Singh, G., Mehta, B.S., Sethi, I.C. and Arora, C.L. (1987). Genetic and non-genetic factors affecting growth traits of Nali and its crossbred lambs under semi-arid conditions. Indian J. Anim. Sci., 57:728-734 
  26. Singh, V.K., Arora, A.L., Meheta, B.S., Mishra, A.K., Kumar, S. and Prince, L.L.L. (2006). Technical bulletin-New strains of sheep evolved, CSWRI. pp: 21
  27. Tomar, A.K.S., Mehta, B.S. and Singh, G. (2000). Greasy fleece production and factors affecting it in Bharat Merino sheep under semi-arid climate of Rajasthan. Indian J. Anim. Sci., 70: 96-97
  28. Zhang, C., Zhang, Y., Zu, D., Li, X., Su, J. and Yang, L. (2009). Genetic and phenotypic parameters estimate for growth traits in Boer goat. Livestock Sci., 124: 66-71

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