Nestor K E, Noble D O
Department of Animal Sciences, Ohio Agricultural Research and Development Center, Ohio State University, Wooster 44691, USA.
Poult Sci. 1995 Mar;74(3):427-33. doi: 10.3382/ps.0740427.
Egg traits, mature BW, fertility, and hatch of fertile eggs were measured in lines of turkeys selected for increased egg production, increased 16-wk BW, and increased shank width and in corresponding randombred controls to determine the effects of selection. Genetic increases in egg production were associated with decreased mature BW and egg weight with no change in fertility or hatchability. The decrease in egg weight was associated with a proportional decrease in the albumen, shell, and yolk. Genetic increases in BW were associated with increased mature BW and egg weight and decreased fertility and hatch of fertile eggs. The increase in egg weight was primarily due to an increase in albumen. Selection for increased shank width had little influence on egg traits. Fertility and hatch of fertile eggs were correlated. Hatch of fertile eggs was positively correlated (after the effects of line were removed) with absolute and percentage shell and percentage yolk and negatively correlated with percentage albumen. The regression coefficients of egg weight on mature BW differed between lines, with the relationship being larger in smaller lines.
在为提高产蛋量、增加16周龄体重以及增加胫宽而选择的火鸡品系及其相应的随机交配对照组中，对蛋的性状、成年体重、受精率和受精蛋孵化率进行了测量，以确定选择的效果。产蛋量的遗传增加与成年体重和蛋重的降低相关，而受精率或孵化率没有变化。蛋重的降低与蛋白、蛋壳和蛋黄的成比例减少相关。体重的遗传增加与成年体重和蛋重的增加以及受精率和受精蛋孵化率的降低相关。蛋重的增加主要是由于蛋白的增加。选择增加胫宽对蛋的性状影响很小。受精率和受精蛋孵化率相关。受精蛋孵化率与绝对蛋壳重量、蛋壳百分比、蛋黄百分比呈正相关（去除品系影响后），与蛋白百分比呈负相关。不同品系蛋重对成年体重的回归系数不同，较小品系中的关系更大。
