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Effects of the Dominant Lethal Yellow Mutation on Reproduction, Growth, Feed Consumption, Body Temperature, and Body Composition of the Japanese Quail

F. Minvielle^*,1, D. Gourichon, S. Ito, M. Inoue-Murayama and S. Rivière

^* UMR1236 INRA/INA-PG Génétique et Diversité Animales, Institut National de la Recherche Agronomique, 78352 Jouyen-Josas, France; UE997 INRA Génétique Factorielle Avicole, Institut National de la Recherche Agronomique, 37380 Nouzilly, France; and Faculty of Applied Biological Sciences, Gifu University, 501-1193, Japan

¹ Corresponding author: francis.minvielle{at}jouy.inra.fr

Wild-type Japanese quail were compared with full-sibs with a yellow plumage color determined by an autosomal dominant mutation (Y), which is lethal when homozygous. These quail have wheat-straw yellow-colored feathers. Early growth was slower in yellow quail that had 2.4% lower BW than wild-type quail (149.3 g vs. 153.0 g) at 28 d of age. The BW, however, was similar for yellow and wild-type males at 35 d, and it remained so throughout the last part of the growth of the quail monitored until the age of 120 d, as indicated by the very close parameters of the monomolecular growth curve [BW= A – B exp(–kt)] obtained for the 2 groups. Yellow plumage color was also associated with a more difficult adaptation to housing (measured by temporary BW loss) in individual cages and to a significantly 0.2°C lower body temperature at 42 d, but feed consumption and residual feed intake were similar for the 2 plumage color phenotypes. Breast and liver weights were similar in the 2 groups, but abdominal fat was 24% higher (4.66 vs. 3.76 g) in yellow quail. There is some association between the correlated effects of the Y gene in quail and those of the lethal mutation A^y at the agouti locus in the mouse.

Key Words: Japanese quail • agouti • yellow • plumage color • abdominal fat

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