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中国农学通报

中国农学通报 ›› 2011, Vol. 27 ›› Issue (27): 250-254.

所属专题： 畜牧兽医

• 生物技术科学 • 上一篇    下一篇

3种鼠尾草属植物的核型分析

胡忠红 欧鑫 谭昕 易自力 蒋建雄 陈智勇   

  • 收稿日期:2011-06-24 修回日期:2011-08-03 出版日期:2011-10-25 发布日期:2011-10-25
  • 基金资助:

    芡欧鼠尾草多倍体诱导的研究

Karyotype Analysis of Three Species of Salvia L.

  • Received:2011-06-24 Revised:2011-08-03 Online:2011-10-25 Published:2011-10-25

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摘要：

为了解新种质芡欧鼠尾草与鼠尾草属常见植物一串红、一串蓝之间的亲缘关系，并为其远缘杂交和遗传改良提供基础，本实验在细胞遗传学水平，对鼠尾草属芡欧鼠尾草、一串红、一串蓝3种植物染色体核型进行分析。结果显示芡欧鼠尾草二倍体体细胞染色体数目为12条，核型公式是2n=12=2m+2sm+8st，核型不对称系数(AS.K%)为74.9%，核型分类标准属于“3A”型；一串红二倍体体细胞染色体数目为44条，核型公式是2n=44=34m+2sm+8st，核型不对称系数(AS.K%)为62.4%，核型分类标准属于“2A”型；一串蓝二倍体体细胞染色体数目为18条，核型公式是2n=18=12m+6sm，核型不对称系数(AS.K%)为59.0%，属于“2A”型。通过核型分析，芡欧鼠尾草、一串红、一串蓝的染色体具有明显的差异性，所以认为这3种鼠尾草属植物的亲缘关系较远。

关键词: 土地利用, 土地利用

Abstract:

The aim was to investigate the genetic relationship between a new introduced germplasm(Salvia hispanica L.) and other two common members of Salvia L. family ( Salvia splendens Ker-Gawler and Salvia farinacea), and provide the theoretic foundation for distant hybridization and genetic improvement in these three germplasms. In cytogenetics level, karyotypes of Salvia hispanica L., Salvia splendens Ker-Gawler and Salvia farinacea were discussed in this paper. The results showed that chromosome number of normal diploid of Salvia hispanica L. was 2n=12, karyotype formula was 2n=12=2m+2sm+8st, the AS.K% was 74.9%, which belong to “3A” type; chromosome number of normal diploid of Salvia splendens Ker-Gawler. was 2n=44, karyotype formula was 2n=34m+2sm+8st, the AS.K% was 62.4%, which belong to “2A” type; and chromosome number of normal diploid of Salvia farinacea. was 2n=18, karyotype formula was 2n=12m+6sm, AS.K% was 59.0%, which belong to “2A” type. Through the karyotype analysis, there were great differences of chromosomes between Salvia hispanica L., Salvia splendens Ker-Gawler and Salvia farinacea, thus these three members of Salvia L. family had a distant relationship.