A comparative study among three parental broiler stocks under Egyptian conditions [electronic resouce].

Includes references.

This study was conducted to evaluate the effects of Egyptian conditions on body weight, feed conversion ratio, mortality rate and shank length of three parent stocks. These strains were (Hubbard, Arbor Acres and Cobb) brooded and reared in the same environmental conditions. Each strain consisted of 120 females and 50 males. The birds were fed according to the program feeding of producer Company. Results showed that there were significant (P ? 0.05) differences in body weight, feed conversion ratio, mortality rate and shank length among strains at different periods. Initial body weight was significantly higher in Cobb than other two strains (Hubbard and Arbor Acres). However, final body weight at 8 weeks was significantly higher in Hubbard than other strains (Cobb and Arbor Acres). Moreover, was improved feed conversion ratio of Hubbard strain as compared to Cobb and Arbor Acres throughout the experimental period. No mortality rate found in males of Arbor Acres but female of Hubbard was low mortality in different ages. Initial shank length of Arbor Acres was longer than other two strains Cobb and Hubbard. However, the final shank length of Hubbard was longer than in Cobb and Arbor Acres under Egyptian conditions. Key words: Broiler breeder strain, body weight, feed conversion ratio, shank length.

Summary in Arabic.

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