摘要
对３种（含１变种）毛茛属植物进行了核型研究，其染色体数目及核型资料为首次报道。三叶毛茛（ＲａｎｕｎｃｕｌｕｓｊａｐｏｎｉｃｕｓＴｈｕｎｂ．ｖａｒ．ｔｅｒｎａｔｉｆｏｌｉｕｓＬ．Ｌｉａｏ．）有两种核型，即基本型２ｎ＝２ｘ＝１４＝６ｍ＋４ｓｍ＋４ｓｔ（２ＳＡ）和杂合型２ｎ＝２ｘ＝１４＝６ｍ＋４ｓｍ＋４ｓｔ（１ＳＡ），前者核型的特征是其随体较大，而后者核型变异发生在第２对和第３对同源染色体异形上，并且第６对随体染色只有１条随体；铺散毛茛（Ｒ．ｄｉｆｆｕｓｕｓＤＣ．）核型公式为２ｎ＝４ｘ＝３２＝１０ｍ＋８ｓｍ＋１２ｓｔ（２ＳＡＴ）＋２ｔ（２ＳＡＴ），它是由两个不同的染色体组组成，其中１个是随体比其短臂大得多，另外１个是随体小于其短臂；卷喙毛茛（Ｒ．ｓｉｌｅｒｉｆｏｌｉｕｓ）核型公式为２ｎ＝４ｘ＝３２＝８ｍ＋６ｓｍ＋１８ｓｔ（４ＳＡＴ），它是由４个形态基本相似的染色体组组成。
in the present paper,karyological studies were carried out in two species and one varietyo f Ranunculus L. from China. Their chromosome numbers and karyotypes are all reported here forthe first time. Ranunculus Pponicus Thunb. var. ternatiplius L. Liao shows two differentkaryotypes i. e. common type 2n= 2x= 14= 6m+4sm+4st(2SAT) and heterozygous type2n= 2x= 14= 6m+4sm+4st(1SAT). The former karyotype characteristic is that the satellite islarger. The latter karyotype variations are the occurrence of heteromorphous homologouschromosomes of second pair and the sixth pair SAT-chromosome posses only one satellite,Ranunculus diffusus DC. karyotype formula is 2n = 4x = 32 = 10m+8sm+12st(2SAT)+2t(2SAT). Itconsists of two different genomes. One of them is that the satellite is far larger than the short arm.The other is that the satellite is smaller than the short arm, Ranunculus sileriplius Lvi. karyotypeformula is 2n = 4x = 32 = 8in+6sm+18st(4SAT). It consists of four chromosome sets which is basiclysimilar in karyotype.
出处
《云南植物研究》
CSCD
1996年第3期331-335,共5页
Acta Botanica Yunnanica
基金
国家自然科学基金
江西省自然科学基金
中国科学院生物分类区系特别资助
关键词
毛茛科
三叶毛茛
铺散毛茛
卷喙毛茛
染色体组型
Ranunculus japonicus var.ternatiklius,Ranunculus diffusus,Ranunculus silerifolius,Karyotype
