我国某些蔷薇属花卉的核型研究

A STUDY ON KARYOTYPES OF SOME FLOWERS OF ROSA IN CHINA

摘要: 本文报道了我国产的5种和14个品种的蔷薇属花卉的染色体数目和核型,结果如下:小花型为二倍体,2n=2x=14,少数为混倍体;中花型为三倍体,2n=3x=21;大花型为四倍体,2n=4x=28。大部分种的核型均由其中部和近中部着丝点染色体组成,少数种具近端着丝点染色体。它们可以区分为3种核型类型,即1A、2A和1B。
- 蔷薇属 /
- 核型
Abstract: The present paper reports chromosome numbers and karyotypes of five species and fourteen varieties of Rosa from China. The results are as follows: the small-flowered forms with 2n=2x=14, but a few are mixoploids; the mediumflowered ones with 2n=3x=21; the big-flowered ones with 2n=4x=28. The karyotypes of most cultivars are made of m and sm and a few with st chromosomes. They fall into three types: 1A, 2A and 1B.
- Rosa /
- Karyotype