遗传 ›› 2005, Vol. 27 ›› Issue (5): 735-740.

• 研究报告 • 上一篇    下一篇

中国两种波腿蝗(蝗总科:癞蝗科)染色体C带核型研究

李新江1; 张道川1; 王文强1; 2   

  1. 1. 河北大学生命科学学院,保定 071002; 2. 延安大学生命科学学院,延安 716000
  • 收稿日期:2004-07-19 修回日期:2005-01-14 出版日期:2005-10-10 发布日期:2005-10-10
  • 通讯作者: 张道川

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

LI Xin-Jiang1, ZHANG Dao-Chuan1,WANG Wen-Qiang1,2   

  1. 1. College of Life Sciences, Hebei University, Baoding 071002, China;2. College of Life Sciences, Yan’an University, Yan’an 716000, China
  • Received:2004-07-19 Revised:2005-01-14 Online:2005-10-10 Published:2005-10-10
  • Contact: ZHANG Dao-Chuan

摘要: 报道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)。

关键词: 癞蝗科, 波腿蝗, C带, 核型, 染色体

Abstract: 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 (Bei-Bienko, 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.

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