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绿豆象雄虫延迟交配对雌虫繁殖及精巢的影响
Delayed mating impacts on the reproductive performance and development of the male testis in Callosobruchus chinensis (Coleoptera:Bruchidae)
余慧萍;武晓龙;李春峡;李卓丽;洪黄熙;张李香
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DOI:10.7679/j.issn.2095-1353.2022.094
作者单位:黑龙江大学现代农业与生态环境学院,哈尔滨150080;黑龙江大学现代农业与生态环境学院,哈尔滨150080
中文关键词:绿豆象;延迟交配;生殖力;精巢;发育分级
英文关键词:Callosobruchus chinensis (Linnaeus); delayed mating; fecundity; testis; grading of testis development
中文摘要:
目的】 为了探索绿豆象Callosobruchus chinensis (Linnaeus)雄虫延迟交配对种群的影响。【方法】 将羽化1、2、3、4、5和6 d未交配的绿豆象雄虫与羽化1 d未交配的雌虫配对,观测并分析绿豆象雄虫延迟交配对其种群及雄虫生殖系统发育的影响。【结果】 雄虫交配日龄的延迟,可降低雌成虫的产卵量,缩短雌成虫的产卵期,延长雌雄成虫寿命;与正常交配组相比,延迟雄虫交配组种群的净增值率R0、内禀增长率rm和周限增长率λ的值均较低。雄虫延迟交配后生殖系统的发育显示为中期和末期,且随着雄虫延迟交配天数的增加,其生殖器官的萎蔫程度加剧,当雄虫延迟交配4-5 d时,雄虫生殖器官的萎焉松散程度明显。【结论】 绿豆象雄虫延迟交配可降低雌虫的繁殖能力,且延迟交配后雄虫的生殖器官萎蔫程度与延迟交配的日龄相关。
英文摘要:
[Objectives]  To explore the effects of delayed mating on Callosobruchus chinensis. [Methods]  Unmated males aged 1, 2, 3, 4, 5 and 6 d were paired with 1-day-old unmated females under laboratory conditions and the effects of delayed mating on the intrinsic rate of increase and male testis development were measured. [Results]  Delaying the mating of males reduced female fecundity, shortened the oviposition period but increased adults longevity. The net population growth rate (R0), innate rate of increase (rm) and finite rate of increase (λ) of the delayed mating groups were all lower than those of the control group. Delaying mating also affected the development of the male reproductive system. The degeneration of male reproductive organs increased with the number of days mating was delayed. When mating was delayed for 4 d to 5 d, the degree of degeneration of the male reproductive system was more evident. [Conclusion]  Delaying the mating of male C. chinensis reduced the reproductive capacity of females. The degree of degeneration of the male reproductive organs increased with the number of days by which mating was delayed. 
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