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.
出处
《遗传》
CAS
CSCD
北大核心
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)~~
关键词
癞蝗科
波腿蝗
染色体
核型
C带
中国
Pamphagidae
Asiotmethis
chromosome
karyotype
C-banding
China
