少花龙葵与黄果龙葵染色体核型分析

Karyotype analyses of Solanum photeinocarpum and Solanum nigrum var.suaveolens

关键词:  少花龙葵  黄果龙葵  DAPI带  核型分析

Key words:  S.photeinocarpum  S.nigrum var.suaveolens  DAPI band  karyotype analysis

摘要:

利用DAPI显带技术对少花龙葵和黄果龙葵染色体进行了核型分析。结果表明,少花龙葵染色体数目为24,为二倍体,核型公式为K(2n)=24=6sm+18m; 黄果龙葵染色体数目为48,为四倍体,核型公式为K(4n)=48=48m,并进一步构建了这两个种的核型模式图。此外,还初步探讨了染色体的DAPI带型及其异染色质的分布。为中国龙葵的系统分类和进化趋向研究,以及育种和资源的开发利用提供帮助。

Abstract:

Karyotypes of Solanum photeinocarpum and S.nigrum var.suaveolens were studied by using DAPI banding technique. Somatic chromosome numbers of S.photeinocarpum are 2n 24(diploid),the karyotype formulas being K(2n)=24=6sm+18m; however,the chromosome numbers of S.nigrum var.suaveolens are 4n 48(tetraplont),the karyotype formulas being K(4n)=48=48m,and karyotype idiograms were established of the two species. The DAPI banded pattern and distribution of heterochromatic were also discussed that to improve the systematic classification and evolutionary trends research,breeding and exploiting the resources of S.nigrum in China.