摘要
染色体C带核型在物种鉴定、分类阶元间的比较及其系统演化关系的推断中是一个有用的指标,染色体组内C带分布位置、大小、数量及异染色质含量可以反映出属、种及种下阶元的细胞学异同。文章报道中国2种癞蝗——红缘疙蝗Pseudotmethis rubimarginis Li和准噶尔贝蝗Beybienkia songorica Tzyplenkov的染色体C带核型,结果表明:2种癞蝗均为XO(♂)型性别决定机制。染色体组成均为2n♂=19,染色体为端着丝粒染色体;在各染色体相对长度,C带的大小,位置和着色程度上又存在不同程度的差异,可以作为区分种的依据。
The chromosomal C-banding karyotype is useful for species identification and phylogenetic analyses, The location, size and number of C-bandings and the content of heterochromatin reflect the relationships between different genera, species and even subspecies, The chromosomal C-banding karyotypes in the spermatogenesis of Pseudotmethis rubimarginis Li and Beybienkia songorica Tzyplenkov （Orthoptera Pamphagidae） from China were investigated. The diploid numbers of the 2 species of Pamphagidae are 19 （2n ♂ ）, All chromosomes are acrocentric with paracentromeric C-bands, and the mechanism of sex determination are XO（♂ ）, There are some differences in the relative length of chromosomes and in the size, location and degree of dyeing of C-bands between the 2 species. This may be used to distinguish the 2 species.
出处
《昆虫知识》
CSCD
北大核心
2008年第4期549-553,共5页
Entomological Knowledge
基金
国家自然科学基金面上项目(编号:30770263)
关键词
癞蝗科
染色体
核型
C带
中国
Pamphagidae, chromosome, karyotype, C-banding, China
