摘要
牛双胎可显著的提高生产效率,对母牛和犊牛没有明显的不良影响,不利之处是异性双胎造成母犊不孕。双胎是可以遗传的,双亲的影响较大;不同品种间的双胎率差异显著;另外胎次、季节、营养均影响双胎率。目前常用的提高双胎率的方法是通过遗传选择、激素诱导、激素免疫、胚胎移植等方法。但如果结合标记辅助选择法(MAS)、性别控制、及转基因与克隆技术将有助于快速提高双胎率,提高生产效益。
In cattle, increasing the twinning rate is one alternative for increasing beef production and milk production. There are no disadvantage to cows and its daughters beside twinning in isomerism. Twinning rate in cattle is heritable. In present cattle production, improving twinning rate strategies include hereditary and selection, embryo transplant and hormone immunity, hormone induction. In future, combining marker assistant selection (MAS) , sex-controlling, transfer gene and clone technology will be help to improve twinning rate and cattle production efficiency.
出处
《黄牛杂志》
2001年第6期33-37,共5页
Journal of Yellow Cattle Science
基金
中华农业科教基金资助
关键词
牛
双胎
遗传选择
胚胎移植
激素免疫
激素诱导
繁殖率
Cattle
Twinning
Hereditary and selection
Embryo transplant
Hormone Immunity
Hormone induction.