Genetic Analyses of Generation Means for a Cross Between Two Local Breeds of Chickens: 4- A Model for Hatchability Prediction as a Function of Some Egg Quality Trait

1
Dr. R.Sh
Dr. R.Sh Ph.D.
2
Abou El-Ghar
Abou El-Ghar
3
R.Sh.
R.Sh.
1 Animal Production Research Institute, ARC, Ministry of Agriculture, Egypt.

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GJSFR Volume 13 Issue D7

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Genetic Analyses of Generation Means for a  Cross Between Two Local Breeds of Chickens: 4- A Model for Hatchability Prediction as a Function of Some Egg Quality Trait Banner
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This study was undertaken to predict hatchability as a function of some physical characteristics of eggs in the third generation (F 3 ) and backcrosses (BC 1 and BC 2 ) derived from crossing between two local developed strains of chickens (Gimmizah and Bandarah). The physical parameters used in this study were egg weight, egg shell thickness, egg shape index and yolk/albumin ratio as well as obtained hatchability. The relationships of these parameters in hatchability process were modeled by multiple linear regressions. The performances of the three genetic groups (F 3 , BC 1 and BC 2 ) were used to apply the modeling process. The following model output: Y = 241.6 + 1.126 x 1 + 213.5 x 2 + 79.54 x 3 + 28.03 x 4 , where Y presents the predicted hatchability, 241.6 presents  the intercept parameter (α) and the 1.126, 213.5, 79.54 and 28.03 are the slope parameters (βi) of egg weight (x 1 ), shell thickness (x 2 ), egg shape index % (x 3 ) and yolk/albumin ratio (x 4 ), respectively. Furthermore, the mention approach above confirms the existence of a highly significant relationship between the main regression parameters and predicted hatchability.

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No external funding was declared for this work.

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The authors declare no conflict of interest.

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No ethics committee approval was required for this article type.

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Not applicable for this article.

Dr. R.Sh. 2013. \u201cGenetic Analyses of Generation Means for a Cross Between Two Local Breeds of Chickens: 4- A Model for Hatchability Prediction as a Function of Some Egg Quality Trait\u201d. Global Journal of Science Frontier Research - D: Agriculture & Veterinary GJSFR-D Volume 13 (GJSFR Volume 13 Issue D7): .

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Crossref Journal DOI 10.17406/GJSFR

Print ISSN 0975-5896

e-ISSN 2249-4626

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June 22, 2013

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English

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This study was undertaken to predict hatchability as a function of some physical characteristics of eggs in the third generation (F 3 ) and backcrosses (BC 1 and BC 2 ) derived from crossing between two local developed strains of chickens (Gimmizah and Bandarah). The physical parameters used in this study were egg weight, egg shell thickness, egg shape index and yolk/albumin ratio as well as obtained hatchability. The relationships of these parameters in hatchability process were modeled by multiple linear regressions. The performances of the three genetic groups (F 3 , BC 1 and BC 2 ) were used to apply the modeling process. The following model output: Y = 241.6 + 1.126 x 1 + 213.5 x 2 + 79.54 x 3 + 28.03 x 4 , where Y presents the predicted hatchability, 241.6 presents  the intercept parameter (α) and the 1.126, 213.5, 79.54 and 28.03 are the slope parameters (βi) of egg weight (x 1 ), shell thickness (x 2 ), egg shape index % (x 3 ) and yolk/albumin ratio (x 4 ), respectively. Furthermore, the mention approach above confirms the existence of a highly significant relationship between the main regression parameters and predicted hatchability.

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Genetic Analyses of Generation Means for a Cross Between Two Local Breeds of Chickens: 4- A Model for Hatchability Prediction as a Function of Some Egg Quality Trait

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