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Abstract
The experiment was planned to investigate the genetic and phenotypic parameters of some productive traits in relation to the B-blood group genotypes in chicken. A total of 1809 chickens of both white Leghorn() and Norfa () strains represented five lines of each strain, segregating for B1B1,B2B2,B13B13,B19B19 homozygous genotypes were used in the present experiment.