【摘要】 <正> 为深入调查中华按蚊的种内变异,本人利用1978年由中国医学科学院寄生虫病研究所引进的上海中华按蚊室内品系的四龄幼虫制备,观察了大量唾腺染色体标本。方法是:在偏低温(24～26℃)条件下给予充足饲料培养幼虫,选择肥大的四龄幼虫,在5％醋酸中解剖出唾腺,再用50％醋酸固定1～2min,然后用2％地衣红(由50％醋酸和50％乳酸配制)染色。高倍光学显微镜观察,油镜照相。更多还原

【Abstract】 An inversion heterozygote has been found in the fourth stage larvae of the labora-tory line of Shanghai Anopheles sinensis in our laboratory, the frequency of occurrence of the heterozygote being 2 to 5%. The characteristic inversion loop formed in the midst of chromosome 3R together with the break points arises from 26C to 30A segment of the chromosomes. This inversion paracentric is the first record in the literature available and may be of significance as a genetic marker in studying the inter-specific variation of Anopheles sinensis.更多还原