McCartney M G
Poult Sci. 1978 Nov;57(6):1720-2. doi: 10.3382/ps.0571720.
Sexual maturity and fertility of two lines of broiler breeder males, one commercial and one experimental, were evaluated individually in order to determine the earliest age at which they could be expected to produce viable spermatozoa capable of producing acceptable fertility. Comparative data for the two lines were also collected on duration of fertility, percent fertility, percent hatchability and chicks per hen during an 8-week period using pooled semen from each of the two lines. The results of this study indicate that 9.1 and 6.8% of the male of the experimental and commercial lines, respectively, produce viable spermatozoa at 11 weeks of age, and consequently, could be selected at that age and used to reproduce stock under selection. The duration of fertility was 10.5 days for the experimental line and 8.8 days for the commercial lines; with fertility levels of 86.1 and 82.8%, respectively, for the eggs produced by the two lines during this period. There were no differences in fertility, hatchability, or chicks produce per hen between the two lines for the 8-week reproductive period.
对两个品系的肉种鸡雄性个体（一个商业品系和一个实验品系）的性成熟和繁殖力进行了单独评估，以确定它们有望产生能够实现可接受受精率的有活力精子的最早年龄。在为期8周的时间里，还使用来自两个品系的混合精液收集了两个品系关于受精持续时间、受精率、孵化率和每只母鸡产雏数的比较数据。本研究结果表明，实验品系和商业品系分别有9.1%和6.8%的雄性在11周龄时产生有活力的精子，因此，可以在该年龄进行选择并用于繁殖选育群体。实验品系的受精持续时间为10.5天，商业品系为8.8天；在此期间，两个品系所产鸡蛋的受精率分别为86.1%和82.8%。在为期8周的繁殖期内，两个品系在受精率、孵化率或每只母鸡产雏数方面没有差异。
