中国两种波腿蝗(蝗总科:癞蝗科)染色体C带核型研究  

Chromosomal C-banding Karyotype of 2 Species of Genus Asiotmethis (Acridoidea:Pamphagidae) from China

作　　者：李新江[1] 张道川[1] 王文强[1] 

机构地区：[1]河北大学生命科学学院,保定071002

出　　处：《遗传》2005年第5期735-740,共6页Hereditas（Beijing)

基　　金：国家自然科学基金重点资助项目(编号:30130040)~~

摘　　要：报道了中国两种波腿蝗的染色体C带核型,结果表明:红胫波腿蝗Asiotmethis zacharjini(Bei-Bienko,1926)2n(♂)=18,neo-X为亚中着丝粒染色体,其他均为近端着丝粒染色体,染色体除强染的着丝粒C带,S8染色体具强染端部C带带纹,neo-Y染色体还具有一条宽的弱染的近着丝粒端居间C带,性别决定机制是neo-XY(♂)型,该种染色体组成和性别决定机制在我国癞蝗中为首次报道,蓝胫波腿蝗Asiotmethis jubatus(Uvarov,1926)2n=19(♂),均为近端着丝粒染色体,仅具有明显强染的着丝粒C带,性别决定机制是XO(♂)型;两种波腿蝗的异染色质含量存在显著性差异(α=0.05)。The chromosomal C-banding karyotype in the spermatogenesis of 2 species of Genus Asiotmethis. Uvarov 1943 from China were investigated. It was found that the diploid chromosome number of Asiotmethis zacharjini （BeiBienko, 1926） was 2n（ ♂ ） = 18, the neo-X was a submetacentric chromosome and the rest were acrocentric chromosomes. C-banding pattern showed that all chromosomes presented a paracentromeric block, an interstitial C-band near the centrometic C-block and additional C-band in the distal region. And, the mechanism for sex determination lay in neo-XY（ ♂ ）. In Asiotmethis jubatus （Uvarov, 1926）, the diploid chromosome number was 2n （ ♂ ） = 19. All autosomes and X-chromosomes were acrocentric with paracentromeric C-band only, and the mechanism for sex determination lay in XO（ ♂ ）. The difference in heterochromatin content between the 2 species was significant at 0.05 level.

关 键 词：癞蝗科 波腿蝗 染色体 核型 C带 中国 

分 类 号：Q963[生物学—昆虫学]