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Estimation of genetic and phenotypic parameters of some important economic traits in Khazak native hen in Iran

Published online by Cambridge University Press:  17 December 2015

Ahmad Ebrahimzadeh-Allahabad ,
Zhila Mahmodian ,
Zahra Pezeshkian  and
A. Mollaei
Ahmad Ebrahimzadeh-Allahabad
Affiliation:
Animal Research Center of Zabol University, Zabol, Iran
Zhila Mahmodian
Affiliation:
Graduate Student of Animal Science, Zabol University, Zabol, Iran
Zahra Pezeshkian*
Affiliation:
Department of Animal Science, University of Guilan, Rasht, Iran
A. Mollaei
Affiliation:
Graduate Student of Animal Science, Zabol University, Zabol, Iran
*
Correspondence to: Z. Pezeshkian, Department of Animal Science, University of Guilan, Rasht, Guilan, P. O. Box 416351314, Iran. email: zahra_pezeshkian@yahoo.com
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Summary

The purpose of this study was the estimation of genetic and phenotypic parameters of important economic traits in Khazak native hens in Iran. The registered records of 7 434 Khazak native chickens containing 5 238 hens and 2 196 cocks in the research centre of Zabol University from 2007 to 2011 were used. The results of this study were compared with the results of studies on other native chickens breeding in Iran (Yazd: 4198, Mazandaran: 49 536, Esfahan: 23 108, West Azarbaijan: 24 890 and Fars: 30 279). Genotypic and phenotypic correlations between traits and heritability of traits were evaluated by univariate and bivariate animal models using ASREML software. The quantity of some traits such as the average egg production, weight of eggs produced, fertility, hatchability, age of sexual maturity and broodiness were a month 120, 45.15 g, 65.25 percent, 74.83 percent, 5.54 and 1.90, respectively. The heritability of sexual maturity age, the number of eggs produced and egg weight were 0.22 ± 0.41, 0.16 ± 0.13 and 0.50, respectively. The genetic correlation between the age of sexual maturity and the number of eggs produced were 0.95 ± 0.02 and 0.29 ± 0.07, respectively. The results of the study showed that decreasing the sexual age of maturity will lead to an increase in the number of eggs produced. The results of variance analysis showed that some factors such as hen age, broodiness (P < 0.01) and the weight of hens have a significant effect on hatchability.

Résumé

Le but de cette étude a été d'estimer les paramètres génétiques et phénotypiques de certains caractères importants à intérêt économique des poules autochtones Khazak en Iran. Les données prélevées entre 2007 et 2011 sur 7 434 volailles autochtones Khazak (5 238 poules et 2 196 coqs) du centre de recherche de l'Université de Zabol ont été utilisées. Les résultats de cette étude ont été comparés à ceux d’études menées avec d'autres poules autochtones élevées en Iran (Yazd: 4 198, Mazandéran: 49 536, Ispahan: 23 108, Azerbaïdjan Occidental: 24 890 et Fars: 30 279). Les corrélations génotypiques et phénotypiques entre les caractères et l'héritabilité des caractères ont été évaluées avec des modèles animaux univariés et bivariés en utilisant le software ASREML. Les valeurs de certains caractères tels que la production moyenne d’œufs, le poids des œufs produits, la fertilité, le taux d’éclosion, l’âge à la maturité sexuelle et la couvaison ont été un mois de 120, 45.15 g, 65.25 pour cent, 74.83 pour cent, 5.54 et 1.90, respectivement. L'héritabilité de l’âge à la maturité sexuelle, du nombre d’œufs produits et du poids des œufs ont été de 0.22 ± 0.41, 0.16 ± 0.13 et 0.50, respectivement. Les corrélations génétiques entre l’âge à la maturité sexuelle et le nombre d’œufs produits ont été de 0.95 ± 0.02 et 0.29 ± 0.07, respectivement. Les résultats de l’étude ont montré qu'atteindre la maturité sexuelle à un âge plus précoce entraîne une augmentation du nombre d’œufs produits. Les résultats de l'analyse de la variance ont montré que certains facteurs tels que l’âge de la poule, la couvaison (P < 0.01) et le poids des poules ont un effet significatif sur le taux d’éclosion.

Resumen

El propósito de este estudio fue la estimación de los parámetros genéticos y fenotípicos de algunos caracteres importantes de interés económico en gallinas autóctonas Khazak de Irán. Se emplearon los datos tomados, entre 2007 y 2011, en 7 434 aves autóctonas Khazak (5 238 gallinas y 2 196 gallos) del centro de investigación de la Universidad de Zabol. Se compararon los resultados de este estudio con los resultados de estudios realizados con otras gallinas autóctonas criadas en Irán (Yazd: 4 198, Mazandarán: 49 536, Isfahán: 23 108, Azerbaiyán Occidental: 24 890 y Fars: 30 279). Las correlaciones genotípicas y fenotípicas entre los caracteres y la heredabilidad de los caracteres fueron evaluadas con modelos animales univariados y bivariados usando el software ASREML. Algunos caracteres tales como la producción media de huevos, el peso de los huevos producidos, la fertilidad, la incubabilidad, la edad a la madurez sexual y la cloquez ascendieron un mes a 120, 45.15 g, 65.25 por ciento, 74.83 por ciento, 5.54 y 1.90, respectivamente. La heredabilidad de la edad a la madurez sexual, del número de huevos producidos y del peso de los huevos fue de 0.22 ± 0.41, 0.16 ± 0.13 y 0.50, respectivamente. Las correlaciones genéticas entre la edad a la madurez sexual y el número de huevos producidos fueron de 0.95 ± 0.02 y 0.29 ± 0.07, respectivamente. Los resultados del estudio mostraron que alcanzar la madurez sexual a una edad más temprana conlleva un aumento en el número de huevos producidos. Los resultados del análisis de la varianza mostraron que algunos factores tales como la edad de la gallina, la cloquez (P < 0.01) y el peso de las gallinas tienen un efecto significativo sobre la incubabilidad.

Keywords

Khazak henheritabilitygenetic correlationsexual maturity ageegg productionpoule Khazakhéritabilitécorrélation génétiqueâge à la maturité sexuelleproduction d’œufsgallina Khazakheredabilidadcorrelación genéticaedad a la madurez sexualproducción de huevos
Type
Research Article
Information
Animal Genetic Resources/Resources génétiques animales/Recursos genéticos animales , Volume 57 , December 2015 , pp. 99 - 103
Copyright
Copyright © Food and Agriculture Organization of the United Nations 2015 

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