the action of the sex linked barring gene on spanish chickens with gold plumage性的作用除了西班牙与黄金羽毛鸡基因有关.pdf

The action of the sex linked barring gene on Spanish chickens with gold plumage J. L. CAMPO F. OROZCO de Genitica Cuantitativa Animal Departamento y Mejora Instituto Nacional de Investigaciones Agrarias Carretera de La Coruna Km. 7, Madrid (Espana) Summary This work concerns the genetic description of Spanish chickens breeds and study of the action of the sex-linked barring gene observed in gold plumage populations of Northern Spain. The crosses of Gold Barred Basque with cc Gastetlana (Black Spanish) showthat the allele of those populations is the same as B. In gold birds +)(s the B allele originates non-pigmented bars alternated with black or gold bars, depending on the presence of the extended black allele (E) or another allele of this locus, respectively. The latter phenotype (gold barred) does not show the typical white patch on the back of the chick head. Concerning the E-locus allele in Basque and Prat breeds, it is tentatively concluded that the dominant wheaten allele is in both breeds. The possible presence of the columbian wh)(e present type restriction gene in both breeds is suggested too. The dominance of E over wheis very incomplete in presence of the barring and /or the columbian genes. Introduction The action of the sex-linked barring gene (B) does not seem entirely under- stood in presence of the extended black (E) and the sex-linked gold +)(s genes. The registry of poultry genetic stocks OMES(S,1978) points out, describing B, that it interrupts deposition of pigment to yield a bar showing basic ground color This definition lead one to think that i