【摘要】 为提高外来高产鸡品种在高原地区的种蛋孵化率,改良当地藏鸡的生产和繁殖性能,在西藏环境条件下以藏鸡和引进隐性白羽鸡为亲本设立4种交配组合,对其繁殖性状及影响因素进行了分析,结果表明:以藏鸡为母本的种蛋受精率显著低于隐性白羽鸡(P<0.05),但其孵化率显著高于后者(P<0.05),尤其在孵化后期母本为隐性白羽鸡的胚胎死亡率比藏鸡高7.95%。而母本为藏鸡的杂交组合Ⅲ,其孵化率比母本为隐性白羽鸡的杂交组合Ⅱ高20.44%,为以藏鸡为母本进行杂交改良提供了理论依据。Binary logistic回归分析结果进一步表明,交配组合与环境温度是影响孵化率的重要因素。更多还原

【Abstract】 To improve the hatchability of introduced,high yield chickens at Tibet altitude,and ameliorate the egg performance and reproduction traits of the local Tibetan chicken,four mating combinations between the Recessive White and Tibetan chicken were employed in this study.The influences of the mating system and environmental factors on hatchability were investigated.The results showed that the fertility of the egg was significantly lower for those using Tibetan chicken as maternal parent than those using Recessive White as maternal parent(P<0.05),while hatchability was on the contrary(P<0.05).Especially during the late stage of incubation,the embryonic mortality of Recessive White was significantly higher than the Tibetan eggs by 7.95%.The hatchability of combination Ⅲ whose female parent is Tibetan chicken was higher than Ⅱ whose female parent is Recessive White by 20.44%,which further provided a theoretical basis for cross using the Tibetan chicken as maternal parent.Binary logistic regression analysis results also showed that the mating combinations and environmental factors were of the importance for the egg hatchability.更多还原