【摘要】 该文主要论述了为解决西藏藏鸡生产性能低下、繁殖性能不高、孵化率低、良种覆盖率低等瓶颈问题,引进白来航鸡血统,经过杂交创新、自繁定性和选育提高三大阶段,通过继代选育、分子标记辅助育种等方法,经过6个世代的系统选育,培育出“雪域白鸡”的过程。“雪域白鸡”的整个选育过程经历62年的漫长岁月,该品种主要生产性能为:72周龄入舍鸡产蛋个数为180～207个,平均蛋重46.80～52.20 g,受精率为93.00%～95.00%,受精蛋高原孵化率为76.00%～85.00%, 0～18周龄成活率为85.30%～88.60%,产蛋期料蛋比为(3.5～3.8)∶1, 72周龄母鸡体重为1250～1460 g。更多还原

【Abstract】 In order to solve the bottleneck problems of low production performance, low reproductive performance, low hatching rate and low coverage rate of good varieties of Tibetan chickens in Xi Zang, the introduction of white Lehang chicken blood has gone through three stages of hybridization innovation, self-propagation and breeding improvement. After six generations of systematic breeding through subbreeding, molecular marker-assisted breeding, "Snow White chicken" was bred.The whole breeding process of "Snow White chicken" has experienced a long time of 62 years.Key production performance indicators for this breed hens at 72 weeks includes that average egg production is a range of 180 to 207, with individual egg weights ranging from 46.80 g to 52.20 g, and fertilization rates are between 93.00% and 95.00%, with high-altitude hatching success rates for fertilized eggs ranging from 76.00% to 85.00%.Moreover, the survival rates for chicks aged 0 to 18 weeks are falling within a range of 85.30% to 88.60%. Feed-to-egg conversion ratios are approximately between(3.5 ～ 3.8)∶1. Finally, hens at 72 weeks exhibit weights ranging from 1250 to 1460 g.更多还原