Sperm competition greatly decreases the time interval when breeder hens are artificially inseminated by different cockerels
文献类型： 外文期刊
作者： Ma, J. 1 ; Chen, P. 1 ; Xu, G. 1 ; Peng, Z. 1 ; Yang, C. 1 ; Shu, D. 1 ; Wang, J. 1 ; Luo, C. 1 ; Qu, H. 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Inst Anim Sci, Guangzhou 510640, Guangdong, Peoples R China; State Key Lab Livestock & Poultry Breeding, Guangzhou 510640, Guangdong, Peoples R China
关键词： insemination interval;insemination frequency;sperm competition;fast- and slow-feathering;breeding broiler
期刊名称：JOURNAL OF APPLIED POULTRY RESEARCH （ 影响因子：1.178； 五年影响因子：1.572 ）
ISSN： 1056-6171
年卷期： 2013 年 22 卷 1 期
页码：
收录情况： SCI
摘要： When hens are inseminated by different types of roosters, natural elimination of the influence of insemination by a previous rooster may require some time, reducing the breeding activity of the hens. Two separate experiments were conducted to determine the effects of sperm competition between 2 breeder males on reducing the time interval which eliminated the influence of previous artificial insemination (AI). At the conclusion of the experiments, sperm retained their activity even after 20 d in a noncompetitive situation. When females were artificially inseminated by different types of roosters, if the time interval between AI was less than 12 d, 14 d were required to eliminate the influence of the previous AI in the sperm competition even if the females were repeatedly inseminated by the second type of breeder males. However, if the duration between AI was more than 12 d, AI once by a different type of breeder males was sufficient to prevent the spermatization of the previous male. In summary, the current study suggests that maintaining a time interval of 12 d between inseminations and repeatedly inseminating females by a different type of breeder male every 4 d allowed the elimination of the influence of the previous AI within 14 d. This duration was 7 d less than that required for the natural elimination of the influence of the previous AI, and such a situation could be easily manipulated.
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