樱属植物核型参数及种间亲缘关系分析
摘要： 统计了18份樱属植物的核型数据,借助DPS软件用最大距离法进行聚类分析,探讨了属内系统结构和种间亲缘关系。结果表明:樱属染色体基数x=8,染色体数目有2n=16、2n=24以及2n=32; 染色体类型有4种,正中部着丝点染色体(M),中部着丝点染色体(m),近中部着丝点染色体(sm),近端部着丝点染色体(st); 随体常见,核型类型有2A、2B、1B 3种; 野生类群多为二倍体,栽培品种多倍化现象显著; 大叶早樱(Cerasus subhirtella)、‘十月樱’(C. subhirtella ‘Autumnalis’)、东京樱花(C. yedoensis)、山樱花(C. serrulata)聚为一类,支持黑果组(C. sect. Sargentella)成立; 二倍体酸樱桃(C. vulgaris)、甜樱桃(C. avium)聚为一类,支持芽鳞组(C. sect. Cerasus)成立; 虽然红山樱(C. jamasakura)与山樱花表型相似,但聚类结果显示二者遗传距离较远,前者与钟花樱(C. campanulata)遗传距离较近; 本属栽培种类多倍化程度高于野生种类且有多个倍性,与其二倍体祖先表现出较远的遗传距离; 聚类分析难以解释栽培种的起源。与传统的经典分类结果不同,矮生樱亚属(C. subg. Microcerasus)与典型樱亚属(C. subg. Cerasus)在聚类图上没有明显地分开。
Abstract: Cluster analysis of eighteen materials of Cerasus was made by using DPS software with a maximum distance algorithm to explore systematic structure among genera and the relationship among species based on karyotype parameters. The result indicated that: basic chromosome number of this genus was proved to be x=8, chromosome number was proved to be 2n=16, 2n=24 and 2n=32; there were four chromosome types: M, m, sm and st; satellites were common, karyotypes were confirmed to be 2A, 2B, 1B; taxa of wild species were confirmed diploid, and polyploidy phenomenon was remarkable in cultivars; C. subhirtella, C. subhirtella ‘Autumnalis’, C. yedoensis and C. serrulata stayed together, supporting the morphological C. sect. Sargentella; Diploid C. vulgaris and C. avium stayed together, supporting C. sect. Cerasus. Although C. jamasakura was morphologically similar to C. serrulata, their genetic distance was very far and the former was closer to C. campanulta. Polyploidy frequency in cultivated species was significantly higher than in wild species, showing a long genetic distance to their diploid ancestors. However, karyotype analysis and cluster analysis were difficult to explain the origin of cultivated species. Unlike morphological evidence, C. subg. Microcerasus and C. subg. Cerasus had not been apparently separated by cluster analysis.
中图分类号:
Q948
相关知识
凤仙花近缘种间核型分析与叶表皮微形态研究
兜兰属（Paphiopedilum）植物细胞学及其亲缘关系的研究
部分菊属与亚菊属植物的形态学聚类及亲缘关系分析
三种常见榕属植物的核型研究
基于ITS序列分析豹子花属与5种百合的亲缘关系
九种百合属植物核型及遗传变异研究
我国部分百合野生资源的亲缘关系及其分布特点
石蒜属植物种间杂交种染色体制片体系优化和细胞遗传学分析
4个观赏芍药新品种染色体核型分析
安徽贝母属植物的核型研究
网址: 樱属植物核型参数及种间亲缘关系分析 https://m.huajiangbk.com/newsview1927051.html
| 上一篇: 毕节寒绯樱价格咨询「毕节嘉山农旅 |
下一篇: 甜樱桃‘红灯’与郁李的远缘杂交及 |
