A Mutation at the I Locus in an Inbred Line of White Leghorns and its Effect on Growth Rate
1962; Elsevier BV; Volume: 41; Issue: 2 Linguagem: Inglês
10.3382/ps.0410488
ISSN1525-3171
AutoresCarol Blackwood, B.B. Bohren, Henry Mckean,
Tópico(s)Berry genetics and cultivation research
ResumoINTEREST in the effects associated with the gene for dominant white, I, has been stimulated by its extensive use in commercial broiler crosses. A number of studies have indicated that the dominant white gene is associated with a reduced rate of growth. Superiority of the recessive (ii) genotype in growth rate was observed by Jerome, Slinger, Huntsman and Pepper (1956), Jaap and Grimes (1956), Collins and Hubbard (1958) and Mérat (1959). On the contrary, Williams, Krueger and Quisenberry (1959) found the heterozygote (Ii) to give growth superior to the recessive homozygote. The superiority of the recessive genotype in growth rate has been attributed by various workers to (1) linkage of growth genes with the I locus, (Jerome et al., 1956), (2) pleiotropic effects of the I gene, (Jerome et al., 1956; Mérat, 1959), and (3) interaction of I with the dominant alleles of the genes for extended black (E), …
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