Discolorations in Stored Eggs When Layers at Two Locations Were Fed Cottonseed Meals Made from Glandless and Glanded Seed

Abstract

SCHAIBLE <it>et al.</it> (1934) were apparently the first to present comprehensive data showing that gossypol, found in the pigment glands, is the component of cottonseed that causes dark yolk discolorations when cottonseed meal is fed to laying chickens. That the discolorations may range from light-brown to black was reported by Swenson <it>et al.</it> (1942) and Heywang <it>et al.</it> (1949). Lorenz (1939) found that “reddish-brown” colored whites in eggs from layers fed cottonseed meal were attributable to a component(s) in the lipids of cottonseed. Frampton <it>et al.</it> (1961) reported that the intensity of dark yolk discolorations was at least partly due to a component(s) of cottonseed other than gossypol. Kemmerer <it>et al.</it> (1961) found that discolorations in the yolks of eggs from layers given crystalline gossypol were intensified when <it>Sterculia foetida</it> oil, which causes pink whites, was fed at the same time. Strains of cotton with seeds free of pigment glands . . .