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Genetic improvement of egg production from crossing two developed strains with commercial laying hens [electronic resouce].

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Abou El-Ghar, R. Sh

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Language: English Summary language: Arabic Description: P. 457-472Other title:

التحسين الوراثى لإنتاج البيض عند خلط سلالاتين مستنبطتين مع سلالة تجارية من الدجاج البياض [Added title page title]

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Egyptian poultry science journal, 2010 v. 30 (II) [electronic resouce].

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In: Egyptian Poultry Science Journal 2010.v.30(II)Summary: Genetic analyses of experimental data of Mandarah and Silver montazah ,strains and their crosses with commercial laying hens Lohman Brown (LB) were done to exploit the existing genetic variations for improving some egg production traits. It was obvious from this study that LB was superior than both developed strains for all the traits. The differences between parents were highly significant in all the studied traits. The .studied traits showed highly significant differences between hybrids, hybrids \IS, parents and 3-ways crosses vs. single crosses. The effect of heterosis was weak and negative in single crosses when measured as a deviation from the commercial strain (LB).

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Genetic analyses of experimental data of Mandarah and Silver montazah ,strains and their crosses with commercial laying hens Lohman Brown (LB) were done to exploit the existing genetic variations for improving some egg production traits. It was obvious from this study that LB was superior than both developed strains for all the traits. The differences between parents were highly significant in all the studied traits. The .studied traits showed highly significant differences between hybrids, hybrids \IS, parents and 3-ways crosses vs. single crosses. The effect of heterosis was weak and negative in single crosses when measured as a deviation from the commercial strain (LB).

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