Estimation of genetic parameters for productive and reproductive traits in Esfahan native chickens

The main aim of this research was to estimate the genetic and phenotypic parameters for productive and reproductive traits of Esfahan native chickens. Traits included body weights at hatch (BW1), 8 weeks of age (BW8), 12 weeks of age (BW12), and at sexual maturity (WSM)), age at sex maturity (ASM), egg number (EN), average egg weight (AEW) in the first 12 weeks of production, and egg production intensity (Eint). Data were collected over 13 generations (during 1998 to 2011) at the breeding center of Esfahan native chickens in Iran. Genetic parameters were estimated by a (bi)- univariate animal model using the restricted maximum likelihood (REML) procedure. Heritability estimates for body weight at different ages varied from 0.14±0.01 to 0.42±0.01. Estimated heritability for reproductive traits ranged from 0.12±0.01 for Eint to 0.36±0.01 for AEW. Estimates of heritabil- ity values were moderate but BW1 and AEW showed higher heritability values. Genetic correlation among body weight traits varied from 0.20±0.03 to 0.82±0.02. Fairly small negative Genetic correla- tion between body weight traits and egg traits (EN and Eint) was small (in the range of -0.22±0.05 to -0.03±0.03), while they showed positive and moderate genetic correlation with the average egg weight, ranging from 0.11±0.04 to 0.39±0.02. There was a low negative genetic correlation (-0.09±0.02) between egg number and egg weight. Therefore, during simultaneous selection for growth and egg pro- duction, probable reduction in egg production due to low reduction in egg number may be compared

[1]  S. Zerehdaran,et al.  Heritability, genetic and phenotypic correlations of egg quality traits in Iranian native fowl , 2010, British poultry science.

[2]  J. V. van Arendonk,et al.  Genetic and phenotypic parameter estimates for body weights and egg production in Horro chicken of Ethiopia , 2010, Tropical Animal Health and Production.

[3]  Hans H. Cheng,et al.  Genome-wide assessment of worldwide chicken SNP genetic diversity indicates significant absence of rare alleles in commercial breeds , 2008, Proceedings of the National Academy of Sciences.

[4]  H. Yeganeh,et al.  Animal model estimation of genetic parameters for most important economic traits in Iranian native fowls. , 2007 .

[5]  M. Zamiri,et al.  Heritabilities and genetic correlations of economic traits in Iranian native fowl and estimated genetic trend and inbreeding coefficients , 2007, British poultry science.

[6]  D. Norris,et al.  Genetic parameter estimates for body weight in local Venda chickens , 2006, Tropical Animal Health and Production.

[7]  Yong-Min Cho,et al.  Estimation of Genetic Parameters for Economic Traits in Korean Native Chickens , 2006 .

[8]  R. W. Fairfull,et al.  Genetic effects of aging on fitness and nonfitness traits in laying hens housed three per cage. , 2003, Poultry science.

[9]  R. W. Fairfull,et al.  Genetic effects of aging on egg production traits in the first laying cycle of White Leghorn strains and strain crosses. , 2000, Poultry science.

[10]  C. J. Wilcox,et al.  Genetic parameters for egg and related characteristics of white Leghorn hens in a subtropical environment , 1999 .

[11]  J. Estany,et al.  Genetic parameters for egg number, egg weight, and eggshell color in three Catalan poultry breeds. , 1997, Poultry science.

[12]  Birbal Singh,et al.  Effect of long term selection on genetic parameters of economic traits in white leghorn , 1996 .

[13]  K. Johansson,et al.  The pattern of genetic and environmental variation in relation to ageing in laying hens , 1992, Genetics Selection Evolution.

[14]  J. Lwelamira,et al.  Genetic parameters for body weights, egg traits and antibody response against Newcastle Disease Virus (NDV) vaccine among two Tanzania chicken ecotypes , 2008, Tropical Animal Health and Production.

[15]  P. Sørensen,et al.  Poultry breeding and genetics , 1990 .

[16]  P. Horst.  Native fowl as reservoir for genomes and major genes with direct and indirect effects on the adaptability and their potential for tropically orientated breeding plans , 1989 .