Scott T A, Buckland R B, Kennedy B W
Department of Animal Science, Macdonald Campus of McGill University, Ste. Anne de Bellevue, Quebec, Canada H9X 1C0.
Theriogenology. 1980 Oct;14(4):281-98. doi: 10.1016/0093-691x(80)90078-3.
The response to 3 generations of selection for duration of fertility of frozen-thawed semen on fertility and hatchability of fresh and frozen-thawed semen, spermatozoa oxygen uptake, motility and concentration, and ejaculate volume was measured in a broiler line of chickens. The selected line, as compared to the control, had significantly higher levels for all fertility traits of frozen-thawed semen but not hatchabilities. For fresh semen, the lines differed only for duration of fertility. The only difference in semen quality traits was in oxygen uptake by spermatozoa of frozen-thawed semen. The differences between lines for the other parameters were not significant but were in a direction that supported the hypothesis that selection had resulted in improved reproductive capacity. All estimates of fertility within an ejaculate were positively correlated (P<0.01). Correlations between corresponding fertility estimates of fresh and frozen-thawed semen were positive, low and generally non-significant. The proportion of variation as determined by stepwise regression, in fertility estimates accounted for by the measurements of oxygen uptake and motility of fresh and frozen-thawed spermatozoa, ejaculate volume and spermatozoa concentration ranged from 12 to 19 percent.
在一个肉鸡品系中，测定了对冻融精液生育期进行三代选择后，其对新鲜精液和冻融精液的受精率和孵化率、精子摄氧量、活力和浓度以及射精量的影响。与对照组相比，选择品系的冻融精液所有生育性状水平显著更高，但孵化率除外。对于新鲜精液，品系间仅在生育期方面存在差异。精液质量性状的唯一差异在于冻融精液精子的摄氧量。品系间其他参数的差异不显著，但方向支持选择导致繁殖能力提高这一假设。一次射精内所有受精率估计值呈正相关（P<0.01）。新鲜精液和冻融精液相应受精率估计值之间的相关性为正，较低且通常不显著。通过逐步回归确定的，由新鲜和冻融精子的摄氧量、活力、射精量和精子浓度测量值所解释的受精率估计值的变异比例在12%至19%之间。
