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Linear and threshold analysis of direct and maternal genetic effects for secondary sex ratio in Iranian buffaloes

  • Animal Genetics • Original Paper
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Abstract

The objective of this study was to estimate variance components and genetic parameters for secondary sex ratio (SSR) in Iranian buffaloes. Calving records from April 1995 to June 2010 comprising 15,207 calving events from the first three lactations of 1066 buffalo herds of Iran were analyzed using linear and threshold animal models to estimate variance components, heritabilities and genetic correlations between direct and maternal genetic effects for SSR. Linear and threshold animal models included direct and maternal genetic effects with covariance between them and maternal permanent environmental effects were implemented by Gibbs sampling methodology. Posterior means of direct and maternal heritabilities and repeatability for SSR obtained from linear animal model were 0.15, 0.10, and 0.17, respectively. Threshold estimates of direct and maternal heritabilities and repeatability for SSR were 0.48, 0.27, and 0.52, respectively. The results showed that the correlations between direct and maternal genetic effects of SSR were negative and high in both models. In addition, the ratios of maternal permanent environmental variance were low. Exploitable genetic variation in SSR can take advantage of sexual dimorphism for economically important traits which may facilitate greater selection intensity and thus greater response to selection, as well as reducing the replacement costs. Threshold animal model may be applied in selection programs where animals are to be genetically ranked for female rate.

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References

  • Berry DP, Kearney JF, Roche JR (2011) Evidence of genetic and maternal effects on secondary sex ratio in cattle. Theriogenology 75:1039–1044

    Article  CAS  PubMed  Google Scholar 

  • Borghese A (2005) Buffalo production and research. FAO Reional Office for Europe Inter-Regional Cooperative Research Network on Buffalo (ESCORENA). ftp://ftp.fao.org/docrep/fao/010/ah847e/ah847e.pdf. Accessed: 11 November 2013

  • Chandler JE, Steinholt-Chenevert HC, Adkinson RW, Moser EB (1998) Sex ratio variation between ejaculates within sire evaluated by polymerase chain reaction, calving, and farrowing records. J Dairy Sci 81:1855–1867

    Article  CAS  PubMed  Google Scholar 

  • Dempster ER, Lerner IM (1950) Heritability of threshold characters. Genetics 35:212–236

    CAS  PubMed Central  PubMed  Google Scholar 

  • Fisher RA (1930) The Genetical Theory of Natural Selection. Oxford University Press, Clarendon, Oxford

    Google Scholar 

  • Ghavi Hossein-Zadeh N (2012) Evidence of the genetic trend for secondary sex ratio in Iranian Holsteins. Reprod Fertil Dev 24:438–442

    Article  PubMed  Google Scholar 

  • Ghavi Hossein-Zadeh N, Nejati-Javaremi A, Miraei-Ashtiani SR, Mehrabani-Yeganeh H (2006) Effect of threshold nature of traits on heritability estimates obtained by linear model. 8th WCGALP, August 13–18, Belo Horizonte, MG, Brasil

  • Ghavi Hossein-Zadeh N, Madad M, Shadparvar AA, Kianzad D (2012) An observational analysis of secondary sex ratio, stillbirth and birth weight in Iranian buffaloes (Bubalus bubalis). J Agric Sci Technol 14:1477–1484

    Google Scholar 

  • Gianola D (1982) Theory and analysis of threshold characters. J Anim Sci 54:1079–1096

    Google Scholar 

  • Hosmer D, Lemeshow S (2000) Applied Logistic Regression, 2nd edn. Wiley-Interscience, New York

    Book  Google Scholar 

  • Hyndman RJ (1996) Computing and graphing highest density regions. Am Stat 50:120–126

    Google Scholar 

  • Jurado JJ, Alonso A, Alenda R (1994) Selection response for growth in Spanish Merino flock. J Anim Sci 72:1433–1440

    CAS  PubMed  Google Scholar 

  • Kianzad D (2000) A case study on buffalo recording and breeding in Iran. ICAR Technol Ser 4:37–44

    Google Scholar 

  • Legarra A, Varona L, Lopez de Maturana E (2011) TM user’s guide

  • Lush JL (1994) The Genetics of Populations. College of Agriculture, Iowa State University, Ames, Iowa. Eds Chapman, A.B.. & Shrode, R.R., Special Report 94

  • Maniatis N, Pollott GE (2003) The impact of data structure on genetic (co)variance components of early growth in sheep, estimated using an animal model with maternal effects. J Anim Sci 81:101–108

    CAS  PubMed  Google Scholar 

  • Maria GA, Boldman KG, van Vleck LD (1993) Estimates of variances due to direct and maternal effects for growth traits of Romanov sheep. J Anim Sci 71:845–849

    CAS  PubMed  Google Scholar 

  • Miglior F (1999) Selection for fertility traits. Proc. 24th. EHFC Meeting 110–114

  • Naserian AA, Saremi B (2007) Water buffalo industry in Iran. Ital J Anim Sci 6(Suppl 2):1404–1405

    Google Scholar 

  • Pryce JE, Veerkamp RF (2001) The incorporation of fertility indices in genetic improvement programmes. In: Diskin MG (ed) Fertility in the High-Producing Dairy Cow. British Society of Animal Science, Galway, Ireland, Occasional Publication 26:237–249

  • Roche JR, Lee JM, Berry DP (2006a) Pre-conception energy balance and secondary sex ratio - support for the Trivers-Willard hypothesis in dairy cows. J Dairy Sci 89:2119–2125

    Article  CAS  PubMed  Google Scholar 

  • Roche JR, Lee JM, Berry DP (2006b) Climatic factors and secondary sex ratio in dairy cows. J Dairy Sci 98:3221–3227

    Article  Google Scholar 

  • SAS Institute (2002) User’s Guide: Statistics, Version 9.1 Edition. SAS Inst., Inc., Cary, NC

  • Smith BJ (2005) Bayesian Output Analysis Program (BOA), Version 1.1.5. The University of Iowa. http://www.public-health.uiowa.edu/boa. Accessed Jun. 30, 2013

  • Snyman MA, Erasmus GJ, van Wyk JB, Olivier JJ (1995) Direct and maternal (co) variance components and heritability estimates for body weight at different ages and fleece traits in Afrino sheep. Livest Prod Sci 44:229–235

    Article  Google Scholar 

  • Toro MA, Fernández A, García-Cortés LA, Rodrigáñez J, Silió L (2006) Sex ratio variation in Iberian pigs. Genetics 173:911–917

    Article  CAS  PubMed Central  PubMed  Google Scholar 

  • Tosh JJ, Kemp RA (1994) Estimation of variance components for lamb weights in three sheep populations. J Anim Sci 72:1184–1190

    CAS  PubMed  Google Scholar 

  • Trivers RL, Willard D (1973) Natural selection of parental ability to vary the sex ratio of offspring. Science 179:90–92

    Article  CAS  PubMed  Google Scholar 

  • Xu ZZ, Johnson DL, Burton LJ (2000) Factors affecting the sex ratio in dairy cattle in New Zealand. Proc N Z Soc Anim Prod 60:301–302

    Google Scholar 

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Acknowledgement

The author wishes to thank the Animal Breeding Center of Iran for providing the data used in this study.

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Authors and Affiliations

  1. Department of Animal Science, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran, P. O. Box: 41635-1314

    Navid Ghavi Hossein-Zadeh

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  1. Navid Ghavi Hossein-Zadeh
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Correspondence to Navid Ghavi Hossein-Zadeh.

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Ghavi Hossein-Zadeh, N. Linear and threshold analysis of direct and maternal genetic effects for secondary sex ratio in Iranian buffaloes. J Appl Genetics 55, 365–372 (2014). https://doi.org/10.1007/s13353-014-0204-2

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  • DOI: https://doi.org/10.1007/s13353-014-0204-2

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