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国产五种菊属植物的核型研究
引用本文:汪劲武,杨继.国产五种菊属植物的核型研究[J].云南植物研究,1991,13(4):411-416.
作者姓名:汪劲武  杨继
作者单位:北京大学生物系,北京大学生物系,北京大学生物系 北京 100871,北京 100871,北京 100871
基金项目:国家自然科学基金资助项目
摘    要:本文对国产5种菊属植物的核型进行了研究,结果为:D. indicum 2n=2x=18=16m 2st,2n=4x=36=28m 6sm 2st;D. lavandulifolium 2n=2x=18=14m 4sm,2n=4x=36=28m 6sm 2st;D. lavandulifolium var.seticuspe 2n=2x=18=12m 6sm;D. chanetii 2n=4x=36=20m 14sm 2st,2n=6x=54=38m 14sm 2st;D. potentilloides2n=2x=18=14m 2sm 2st;D. vestitum 2n=6x=54=38m 16sm.核型分析的结果表明,本文所研究类群中出现的多倍体多为异源多倍体;根据对核型资料、形态特征及地理分布特点的综合分析,作者认为多倍化是菊属野生种进行的主要途径。

关 键 词:菊属  核型  中国

KARYOTYPICAL STUDY OF FIVE SPECIES OF CHINESE DENDRANTHEMA
WANG Jin-Wu YANG Ji LI Mao-Xue.KARYOTYPICAL STUDY OF FIVE SPECIES OF CHINESE DENDRANTHEMA[J].Acta Botanica Yunnanica,1991,13(4):411-416.
Authors:WANG Jin-Wu YANG Ji LI Mao-Xue
Abstract:5 species of Chinese Dendranthema were cytotaxonomically studied in this work. Some of the karyotypes of these species are reported for the first time. The results are shown as follows: D. indicum 2n = 2x= 18= 16m 2st, 2n = 4x = 36 = 28m 6sm 2st; D. lavandulifolium 2n = 2x=18= 14m 4sm, 2n = 4x = 36 = 28m 6sm 2st; D. lavandulifolium var. seticuspe 2n = 2x=18=12m 6sm; D. chanetii 2n = 4x = 36 = 20m 14sm 2st, 2n = 6x = 54=38m 14sm 2st; D. potentilloides 2n = 2x = 18= 14m 2sm 2st; D. vestitum 2n = 6x = 54 = 38m 16sm. From these results, it may be seen distinctively that all these species have a common basic chromosome number x = 9, but some of them varied at tetraploid and haxaploid level. Comparing the morphology of chromosomes of different polyploides, it is suggested that most of them are allopolyploid. Based on a synthetical study of these reults and external morphology as well as geographic distribution characters, the authors deduced that polyploidy is an universal feature of the genus Dendranthema, and which play an important role in evolution of wild species of Dendranthema.
Keywords:Dendranthema  Karyotype  Chinese
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