Nir I, Nitsan Z, Cherry J A, Dunnington E A, Jones D E, Siegel P B
Poult Sci. 1987 Jan;66(1):10-22. doi: 10.3382/ps.0660010.
Growth traits and digestive enzyme activities were compared in parental lines and F1 crosses under ad libitum and alternate-day feeding. Responses to the feeding regimens were, in general, dependent on the background genome and age. Population by feeding regimen interactions were more prevalent for growth traits than for enzymatic activities. Although chickens adapted morphologically and physiologically to the particular feeding regimen to which they were exposed, the degree of adaptation was population dependent. Moreover, a line of White Leghorns differed considerably in response compared to a line of White Rocks selected for low body weight, demonstrating that weight is primarily a result of metabolic and behavioral processes rather than the determiner of those processes.
在自由采食和隔日饲喂条件下，对亲本系和F1杂交种的生长性状和消化酶活性进行了比较。一般来说，对饲喂方案的反应取决于背景基因组和年龄。生长性状的群体与饲喂方案的相互作用比酶活性更为普遍。尽管鸡在形态和生理上适应了它们所接触的特定饲喂方案，但适应程度因群体而异。此外，与选择低体重的白洛克品系相比，白来航品系的反应差异很大，这表明体重主要是代谢和行为过程的结果，而不是这些过程的决定因素。
