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当前位置: 首页 > 文章 > 枇杷属植物核型分析及其在系统分类中的应用 园艺学报 2013,40 (8) 1465-1474
Position: Home > Articles > A Study on Karyotype Analysis of Genus Eriobotrya and Its Application to Systematic Taxonomy Acta Horticulturae Sinica 2013,40 (8) 1465-1474

枇杷属植物核型分析及其在系统分类中的应用

作  者：
李桂芬;梁国鲁;林顺权
单  位：
广西壮族自治区农业科学院园艺研究所;华南农业大学园艺学院;西南大学园艺园林学院
关键词：
枇杷属;核型分析;系统演化
摘  要：
对21个枇杷属材料和1个枇杷近缘属材料(石斑木)用去壁低渗—火焰干燥法进行染色体制片,进行核型分析,结果发现:所试材料的体细胞染色体数均为2n=34,为二倍体,染色体类型包括中部(m)、近中部(sm)和近端部(st)着丝点染色体(st,仅存在于大花枇杷中)3种,核型公式为2n=2x=34=16~24m+10~18sm(+2st),属2A对称型核型。根据各个种的中部着丝点染色体(m)的多少,可将22个材料初步分为5类,从第1类到第5类枇杷,核型不对称性依次增强,表明其系统演化地位逐渐进化。
译  名：
A Study on Karyotype Analysis of Genus Eriobotrya and Its Application to Systematic Taxonomy
作  者：
LI Gui-fen 1,2 ,LIANG Guo-lu 3 ,and LIN Shun-quan 1,* ( 1 College of Horticulture,South China Agricultural University,Guangzhou 510642,China; 2 Horticulture Research Institute,Guangxi Academy of Agriculture Sciences,Nanning 530007,China; 3 College of Horticulture and Lanscape Architecture,Southwest University,Chongqing 400715,China)
关键词：
Eriobotrya;karyotype analysis;evolution
摘  要：
In this paper the wall degradation hypotonic method was used to prepare mitotic chromosome sample of 21 materials(16 species,4 varieties,1 interspecific hybrid)of Eriobotrya and 1 closed genus of Eriobotrya[Rhaphiolepis indica(L.)Lindl.]. The results indicated that the chromosome number was 2n = 2x = 34 in all the materials,and the karyotypes of Eriobotrya and Rhaphiolepis indica consist of three kinds of chromosome:m,sm,and s(tonly in E. cavaleriei Rehd). The karyotype formula was 2n = 2x = 34 =(16 to 24)m +(10 to 18)sm(+ 2st)for all materials. According to the karyotype data, it can be concluded that the karyotypes of 21 Eriobotrya materials belongs to Stebbins’2A,which is a symmetrical karyotype. According to the karyotype formula we preliminarily classified these Eriobotrya materials into 5 groups. The asymmetry increased gradually from the first group to the fifth group,which indicated the systematic evolution among groups is more and more advanced.

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