【作者】 彭艳琼； 杨大荣；

【Author】 PENG Yan-qiong,YANG Da-rong~* (Xishuangbanna Tropical Botanical Gaiden,Chinese Academy of sciences,Yunnan Kunming 6S0223)

【机构】 中国科学院西双版纳热带植物园；

【摘要】 榕树传粉榕小蜂种群内存在极少量未交配的雌雄蜂,而所有的非传粉小蜂种群内均存在未交配的雌蜂或雄蜂,与未交配雄性相比,未交配雌蜂在单个榕果内出现的比率,以及它们的个体数量都较高。在整个种群内,未交配雌蜂的比率可占到雌蜂总量的1.68-77.59%,它们与其种群数量呈显著的负相关关系,但与种群性比率的相关性不显著。当控制非传粉小蜂在一个榕果上繁殖时,结果不存在只有雄蜂后代的榕果,但后代只有雌性的榕果比率均较高,低者有29.3%,高者达80.77%,而且随着繁殖雌蜂数量的增加,单果内未交配雌蜂的个体数量也在增加。在对未交配雌蜂作用已经了解的前提下,本研究最后重点讨论了未交配雄蜂存在的作用。更多还原

【Abstract】 In haplodiploid fig wasps,males develop from unfertilized eggs and females from fertilized eggs. There were few unmated females and males in three species of fig-pollinating wasps.However,ten species of non-pollinating wasps showed different distributive patterns of unmated females and males,which unmated females or males existed in all non-pollinating fig wasps.In contrast to unmated males,the percentage of figs containing virgin females and number of virgin females per fig were higher that those of unmated males.In whole populations,the percentage of virgin females was 1.68-77.59%of all females.There was a significant and negative relationship between percentage of virgin females and population size,percentage of virgin females showed no correlation with sex ratio.When non-pollinating fig wasps were controlled to oviposit on a syconium,there were no the syconia containing only male offspring,but the percentages of syconia containing only female offspring were high,the range was 29.3-80.77%.In the syconia,number of virgin females increased with increasing foundress numbers.In the end,we discussed the function of unmated females and males in the population.The presence of virgin females that can produce only haploid male offspring may have several important effects on a range of phenomena such as reproductive strategies,the transmission of parasitic chromosomes and the evolution of eusociality.Whereas,the presence of unmated may influence the oviposition strategies and mating system evolution of non-pollinating fig wasps.更多还原