| 枇杷属植物核型分析及其在系统分类中的应用 |
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| 引用本文： | 李桂芬,梁国鲁,林顺权.枇杷属植物核型分析及其在系统分类中的应用[J].园艺学报,2013,40(8):1465-1474. |
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| 作者姓名： | 李桂芬 梁国鲁 林顺权 |
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| 作者单位： | （1华南农业大学园艺学院，广州 510642；2广西壮族自治区农业科学院园艺研究所，南宁 530007；3西南大学园艺园林学院，重庆 400715） |
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| 基金项目： | 公益性行业科研专项，亚热带农业生物资源保护与利用国家重点实验室项目，广东普通高校重点实验室华南园艺作物种质资源创新与利用项目 |
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| 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。
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| 关 键 词： | 枇杷属 核型分析 系统演化 |
| 收稿时间： | 2013-01-04 |
A Study on Karyotype Analysis of Genus Eriobotrya and Its Application to Systematic Taxonomy |
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| LI Gui-fen,LIANG Guo-lu,LIN Shun-quan,.A Study on Karyotype Analysis of Genus Eriobotrya and Its Application to Systematic Taxonomy[J].Acta Horticulturae Sinica,2013,40(8):1465-1474. |
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| Authors: | LI Gui-fen LIANG Guo-lu LIN Shun-quan |
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| Institution: | （1 College of Horticulture，South China Agricultural University，Guangzhou 510642，China；2 Horticulture Research Institute，Guangxi Academy of Agriculture Sciences，Nanning 530007，China；3College of Horticulture and Lanscape Architecture，Southwest University，Chongqing 400715，China） |
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| Abstract: | 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 EriobotryaRhaphiolepis 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 st（only 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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| Keywords: | Eriobotrya karyotype analysis evolution |
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