Effect of genotype and egg weight on hatchability properties and embryonic mortality pattern of native chicken populations.

Autor:	Fathi M; Department of Animal Production and Breeding, College of Agriculture and Veterinary Medicine, Qassim University, Al-Qassim 51452, Saudi Arabia; Department of Poultry Production, Faculty of Agriculture, Ain Shams University, Hadayek Shoubra, 11241 Cairo, Egypt. Electronic address: mmfathi@fulbrightmail.org., Abou-Emera O; Department of Animal Production and Breeding, College of Agriculture and Veterinary Medicine, Qassim University, Al-Qassim 51452, Saudi Arabia; Animal Production Research Institute, Agriculture Research Center, Dokki, Giza 12618, Egypt., Al-Homidan I; Department of Animal Production and Breeding, College of Agriculture and Veterinary Medicine, Qassim University, Al-Qassim 51452, Saudi Arabia., Galal A; Department of Poultry Production, Faculty of Agriculture, Ain Shams University, Hadayek Shoubra, 11241 Cairo, Egypt., Rayan G; Department of Poultry Production, Faculty of Agriculture, Ain Shams University, Hadayek Shoubra, 11241 Cairo, Egypt; Department of Animal and Fish Production, College of Agricultural and Food Sciences, King Faisal University, Al-Ahsa 31982, Saudi Arabia.
Jazyk:	angličtina
Zdroj:	Poultry science [Poult Sci] 2022 Nov; Vol. 101 (11), pp. 102129. Date of Electronic Publication: 2022 Aug 11.
DOI:	10.1016/j.psj.2022.102129
Abstrakt:	Fertility and hatchability are 2 major parameters that highly influence the reproductive performance of chicken breeds. The objective of this study is to investigate how the genetic background of chickens affects the aspects of fertility, hatchability, and embryonic mortality pattern. Six different native chicken genotypes (black, black-barred, brown, gray, naked neck, and frizzle) kept under similar conditions were evaluated. A total of 1,645 fertile pedigreed eggs from all genetic groups were collected and incubated in forced draft setter. Fertility, hatchability, embryonic mortality, and hatched chick weight were determined. The data were subjected to a one-way analysis of variance with breed (genotype) as a fixed effect. Sire component of variance were used to compute heritability estimates for hatchability traits. The results showed that the fertility and hatchability of the eggs produced from the naked neck or frizzle genotypes exhibited higher values compared to the other genetic groups. An increase in the relative weight of hatched chicks was detected in hatching eggs weighing 44 g or higher. Therefore, attention should be given to the egg size produced by native chicken populations to achieve maximum hatchability performance. Multiple regression analysis revealed that the settable egg weight and the egg weight loss during incubation are the main factors affecting the relative weight of hatched chicks of all genotypes. Competing Interests: DISCLOSURES The authors declare no conflicts of interest. (Copyright © 2022 The Authors. Published by Elsevier Inc. All rights reserved.)
Databáze:	MEDLINE
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