Pleiotropisms Associated with Alleles of the C Locus in the Domestic Fowl

摘要: Pleiotropisms associated with the recessive white (c) and albino (ca) alleles at C locus of domestic fowl were investigated. Hatchability fertile eggs was not significantly different for colored (C+/c, C+/ca), (c/ca), (ca/ca) chicks; however, late embryonic mortality higher in ca/ca embryos P less than or equal to .005). Albinos exhibited shorter down lengths (P .01), incidences subcutaneous hemorrhage inflammation .01) an increased incidence yolk sac protrusions .01). Suppressed body weights evident all times, except hatching, both male female albinos reared batteries. Recessive females also smaller chicks 7 8 weeks age battery trials Significant suppression occurred only 4 where floor rearing used. Mortality higher, particularly under conditions In addition, feed consumption utilization reduced These data suggest that melanin synthesis is important component expression a number physiological traits exerts previously undefined regulatory influence on such traits.