Shutler D, Bennett G F, Mullie A
Department of Zoology, University of Western Ontario, London, Canada.
Proc Natl Acad Sci U S A. 1995 Jul 18;92(15):6748-52. doi: 10.1073/pnas.92.15.6748.
Recent genetic evidence suggests that parasitic protozoa often reproduce by "selfing," defined as sexual stages from a single, clonal lineage fertilizing each other. Selfing favors production of an excess of female over male progeny. We tested whether the proportion of male gametocytes of blood parasites of the genus Haemoproteus was affected by variables that could influence the probability of selfing. Proportions of male Haemoproteus gametocytes from 11 passerine host populations were not affected by the age of the parasites' avian hosts, date in season, sex of host, intensity of host's infection, or prevalence of parasites within host populations.
最近的遗传学证据表明，寄生原生动物通常通过“自体受精”进行繁殖，自体受精被定义为来自单一克隆谱系的性阶段相互受精。自体受精有利于产生过量的雌性后代而非雄性后代。我们测试了血变原虫属血液寄生虫雄配子体的比例是否受到可能影响自体受精概率的变量的影响。来自11个雀形目宿主种群的血变原虫雄配子体比例不受寄生虫鸟类宿主的年龄、季节日期、宿主性别、宿主感染强度或宿主种群内寄生虫患病率的影响。
