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Plant Diversity ›› 1991, Vol. 13 ›› Issue (03): 1-3.

• 研究论文 •    

长苞铁杉的核型分析及其分类学意义

李林初   

  1. 复旦大学生物系
  • 出版日期:1991-06-25 发布日期:1991-06-25

THE KARYOTYPE ANALYSIS OF TSUGA LONGIBRACTEATA AND ITS TAXONOMIC SIGNIFICANCE

LI Lin-Chu   

  1. Department of Biology, Fudan University
  • Online:1991-06-25 Published:1991-06-25

摘要: 本文首次分析了特产我国的长苞铁杉亚属(Subgen.Paleotsuga)的代表种长苞铁杉Tsuga longibracteata的核型,它全由中部和近中部着丝粒染色体组成,核型公式为K(2n)=24=22m十2sm,属“1A”类型。第12号染色体具“长着丝点区域”。染色体相对长度组成为2n=12M2+10M1+2S。作者发现铁杉亚属(Subgen.Tsuga)植物的核型全为“2A”类型。胞核学资料支持对长苞铁杉亚属和铁杉亚属的划分并表明前者(长苞铁杉)较为原始。长苞铁杉应隶于长苞铁杉亚属、长苞铁杉组。

关键词: 长苞铁杉, 核型, 分类学意义

Abstract: The present paper deals with the karyotype analysis of Tsuga longibracteata Cheng endemic to China, which is a represent species of subgen. Paleotsuga, for the first time. The somatic chromosomes in root -tip cells of the plant are found to be 2n=24, all with median and submedian constrictions. The 12th chromosome of the karyotype has a long centromere region.

Key words: Tsuga longibracteata