东北地区亚洲飞蝗染色体核型分析
Karyotype analysis of Locusta migratoria migratoria in northeast China
李敏，王寅亮，宋慧华，任炳忠**
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作者单位：东北师范大学 生命科学学院长春130024
中文关键词：亚洲飞蝗, 染色体核型, 地理种群
英文关键词：Locusta migratoria migratoria, karyotype, geographic population
中文摘要： 采用常规压片法对吉林省亚洲飞蝗Locusta migratoria migratoria (L.)的染色体核型进行分析。研究结果表明：亚洲飞蝗性别决定机制为XO型，染色体数目为2n♂=23，染色体组式4L+4M+3S+X，全部为端部着丝粒染色体，NF=23。染色体中最长（L1）与最短（S11）染色体之比大于4∶1，臂比大于2∶1的染色体的百分比为0，因此亚洲飞蝗的染色体核型属“1C”核型。未发现B染色体和随体。对吉林和新疆2个地区的亚洲飞蝗的染色体核型进行比较，结果表明两者虽为同一亚种但分属于2个不同的地理种群，由于所处自然地理环境的不同，染色体核型存在微小的差异。
英文摘要： The karyotype of Locusta migratoria migratoria (L.) in Jilin Province was analyzed by conventional chromosome analysis. The sexdetermining mechanism of Locusta migratoria migratoria was XO and the chromosome number was 2n♂=23 with a karyotype formula of 4L+4M+3S+X. All chromosomes were telocentric, NF=23 of the “1C” type. There was no obvious evidence of a B chromosome and satellite. A comparative study of the karyotypes of Locusta migratoria migratoria in Jilin and Xinjiang Provinces indicates that they belong to two different geographic populations of the same subspecies that have distinct geographical environments. Slight differences in chromosomal karyotype were apparent between the two populations.