Genetic evaluation of survival and productivity traits in Arman crossbred sheep

  • Mohammad Mahdi Shariati Ferdowsi University of Mashhad
  • Saeed Zerehdaran Ferdowsi University of Mashhad
  • Fatemeh Pourbayramian Urmia University
  • Shokoufeh Hasanvand University of Zabol
  • Kourosh Mohammadi Islamic Azad University
Keywords: animal models, direct heritability, litter mean weight, litter size, maternal effects

Abstract

Background: Arman sheep breed was synthesized by crossing several breeds, including Baluchi, Ghezel, Chios, and Suffolk. Objective: To estimate the (co)variance components and genetic parameters using the restricted maximum likelihood via twelve animal models for lamb survival and four animal models for ewe productivity traits. Methods: Data and pedigree information were collected at Abbasabad Sheep Breeding Station, Khorasan Razavi province, north-east of Iran, from 1999 to 2011. The traits studied were lamb survival rate (LSR), litter size at birth (LSB), litter size at weaning (LSW), litter mean weight per lambing (LMWL), litter mean weight per lamb weaned (LMWLW), total litter weight at birth (TLWB), and total litter weight at weaning (TLWW). Moreover, multivariate analyses were performed to estimate covariance between the traits. Results: Direct heritability estimates (h2a) for LSR was 0.081 and increased to 0.253 after correcting. Maternal genetic effects (h2m) and common litter effects (l2) accounted for 4 and 11.3% of the phenotypic variance for LSR, respectively. The estimations of h2a were 0.131, 0.080, 0.111, 0.190, 0.118, and 0.150 for LSB, LSW, LMWL, LMWLW, TLWB, and TLWW, respectively. The estimated fractions of variance —attributed to permanent environmental effects on ewe, (pe2) were 0.038, 0.050, 0.071, 0.060, and 0.050 for LSB, LSW, LMWL, TLWB, and TLWW, respectively. Service sire effects (S2) were significant for LSW, LMWL, and TLWB, being 0.038, 0.030, and 0.049, respectively. Direct genetic correlations showed a vast range from 0.13 for LSB-LMWL to 0.91 for LMWL-TLWW. Conclusion: Results indicate that genetic change not only depends on the heritability of traits, but also on the observed phenotypic variation; therefore, improvement of non-genetic factors should be included in the breeding programs.

|Abstract
= 73 veces | PDF
= 64 veces|

Downloads

Download data is not yet available.

Author Biographies

Mohammad Mahdi Shariati, Ferdowsi University of Mashhad

PhD., Department of Animal Science, Ferdowsi University of Mashhad, Mashhad, Iran.

Saeed Zerehdaran, Ferdowsi University of Mashhad

PhD., Department of Animal Science, Ferdowsi University of Mashhad, Mashhad, Iran.

Fatemeh Pourbayramian, Urmia University

MSc., Department of Animal Science, Faculty of Agriculture, Urmia University, Urmia, Iran.

Shokoufeh Hasanvand, University of Zabol

MSc., Department of Animal Sciences, University of Zabol, Iran.

Kourosh Mohammadi, Islamic Azad University

PhD(St)., Young Researchers and Elite Club, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran.

References

Akaike H. A new look at the statistical model identification. IEEE Trans Autom Control 1974; 19:716-723.

Boligon AA, Pereira RJ, Ayres DR, Albuquerque LG. Influence of data structure on the estimation of the additive genetic direct and maternal covariance for early growth traits in Nellore cattle. Livest Sci 2012; 145:212-218.

Chniter M, Hammadi M, Khorchani T, Krit R, Lahsoumi B, Sassi MB, Nowak R, Hamouda MB. Phenotypic and seasonal factors influence birth weight, growth rate and lamb mortality in D’man sheep maintained under intensive management in Tunisian oases. Small Ruminant Res 2011; 99:166-170.

Dickerson G. Efficiency of animal production-molding the biological components. J Anim Sci 1970; 30:849-859.

Ercanbrack SK, Knight AD. Responses to various selection protocols for lamb production in Rambouillet, Targhee, Columbia, and Polypay sheep. J Anim Sci 1998; 76:1311-1325.

Falconer DS. Introduction to quantitative genetics, 3rd ed. Longman Group (FE) Limited; 1989.

Fogarty NM, Dickerson GE, Young LD. Lamb production and its components in pure breeds and composite lines. II. Breed effects and heterosis. J Anim Sci 1984; 58:301-311.

Gilmour AR, Gogel BJ, Cullis BR, Thompson R. ASReml User Guide Release 3.0. VSN International Ltd, Hempstead, HP1 1ES, UK; 2009.

Hill WG. Detection and genetic assessment of physiological criteria of merit within breeds. In: Land, R.B., Robinson, D.W. (Eds.), Genetics of reproduction in sheep. Butterworths, London; 1985.

Maxa J, Sharifi AR, Pedersen J, Gauly M, Simianer H, Norberg E. Genetic parameters and factors influencing survival to twenty-four hours after birth in Danish meat sheep breeds. J Anim Sci 2009; 87:1888-1895.

Mohammadi K, Abdollahi-Arpanahi R, Amraei F, Mohamadi EM, Rashidi A. Genetic parameter estimates for growth and reproductive traits in Lori sheep. Small Rumin Res 2015; 131:35-42.

Mohammadi K, Abdollahi-Arpanahi R. Genetic, phenotypic and environmental trends for growth and reproductive traits in Zandi sheep. Global J Anim Sci Res 2015; 3:311-320.

Mohammadi K, Beigi Nassiri MT, Rahmatnejad E, Sheikh M, Fayazi J, Karimi Manesh A. Phenotypic and genetic parameter estimates for reproductive traits in Zandi sheep. Trop Anim Health Prod 2013; 45:671-677.

Mokhtari MS, Rashidi A, Esmailizadeh AK. Estimates of phenotypic and genetic parameters for reproductive traits in Kermani sheep. Small Ruminant Res 2010; 88:27-31.

Rashidi A, Bishop SC, Matika O. Genetic parameter estimates for pre-weaning performance and reproduction traits in Markhoz goats. Small Ruminant Res 2011; 100:100-106.

Riggio V, Finocchiaro R, Bishop SC. 2008. Genetic parameters for early lamb survival and growth in Scottish Blackface sheep. J Anim Sci 2008; 86:1758-1764.

Robison OW. The influence of maternal effects on the efficiency of selection; A review. Livest Prod Sci 1981; 8:121-137.

Roshanfekr H, Berg P, Mohammadi K, Mirza Mohamadi E. Genetic parameters and genetic gains for reproductive traits of Arabi sheep. Biotech Anim Husb 2015; 31:23-36.

SAS Institute Inc. SAS User’s Guide: Version 9.4. SAS Institute Inc., Cary, NC, USA; 2014.

Van Wyk JB, Fair MD, Cloete SWP. Revised models and genetic parameter estimates for production and reproduction traits in the Elsenburg Dormer sheep stud. S Afri J Anim Sci 2003; 33:213-222.

Vatankhah M, Talebi MA, Edriss MA. Estimation of genetic parameters for reproductive traits in Lori-Bakhtiari sheep. Small Rumin Res 2008; 74:216-220.

Wang CT, Dickerson GE. Simulated effects of reproductive performance on life-cycle efficiency of lamb and wool production at three lambing intervals. J Anim Sci 1991; 69:4338-4347.

Wolf JB, Brodie Iii ED, Cheverud JM, Moore AJ, Wade MJ. Evolutionary consequences of indirect genetic effects. Trends Ecol Evol 1998; 13:64-69.

Published
2018-06-20
How to Cite
Shariati M. M., Zerehdaran S., Pourbayramian F., Hasanvand S., & Mohammadi K. (2018). Genetic evaluation of survival and productivity traits in Arman crossbred sheep. Revista Colombiana De Ciencias Pecuarias, 31(2), 83-92. https://doi.org/10.17533/udea.rccp.v31n2a01
Section
Original research articles