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中国两种波腿蝗(蝗总科:癞蝗科)染色体C带核型研究
引用本文:李新江,张道川,王文强.中国两种波腿蝗(蝗总科:癞蝗科)染色体C带核型研究[J].遗传,2005,27(5):735-740.
作者姓名:李新江  张道川  王文强
作者单位: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
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  
文章编号:0253-9772(2005)05-0735-06
收稿时间:2004-07-19
修稿时间:2005-01-14

Chromosomal C-banding Karyotype of 2 Species of Genus Asiotmethis (Acridoidea:Pamphagidae) from China
LI Xin-Jiang,ZHANG Dao-Chuan,WANG Wen-Qiang.Chromosomal C-banding Karyotype of 2 Species of Genus Asiotmethis (Acridoidea:Pamphagidae) from China[J].Hereditas,2005,27(5):735-740.
Authors:LI Xin-Jiang  ZHANG Dao-Chuan  WANG Wen-Qiang
Institution:1. College of Life Sciences, Hebei University, Baoding 071002, China;2. College of Life Sciences, Yan’an University, Yan’an 716000, China
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 (male) =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 (male). In Asiotmethis jubatus (Uvarov, 1926), the diploid chromosome number was 2n (male) =19. All autosomes and X-chromosomes were acrocentric with paracentromeric C-band only, and the mechanism for sex determination lay in XO (male). The difference in heterochromatin content between the 2 species was significant at 0.05 level.
Keywords:Pamphagidae  Asiotmethis  chromosome  karyotype  C-banding  China
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