摘要
采用根尖压片法确定川产贝母的染色体数目,并分析其染色体核型,以探讨其进化趋势和系统演化关系。结果表明,川产7种、2变种共10个居群贝母属(Fritillaria L.)植物的染色体数目均为24条,核型公式如下:川贝母(Fritillaria cirrhosa D.DON)2n=24=2m+2sm+10st+10t;梭砂贝母(F.delavayi Franch.)2n=24=2m+2sm+10st+10t(SAT);暗紫贝母(折多山居群,F.unibracteata Hsiao&K.C.Hsia)2n=24=4m+6st+14t(SAT);暗紫贝母(茂县居群)2n=24=2m+2sm+10st+10t(SAT);瓦布贝母(Fritillaria wabunesis S.Y.Tang&S.C.Yueh)2n=24=2m+2sm+8st+12t(SAT);甘肃贝母(F.przewalskii Maxim.&Batal.)2n=24=2m+2sm+6st+14t(SAT);湖北贝母(F.hupehesis Hsiao&K.C.Hsia)2n=24=2m+2sm+12st+8t(SAT);康定贝母(F.cirrhosa D.DON var.ecirrhosa Franch.)2n=24=4m+12st+8t(2SAT);长腺贝母(F.unibracteata Hsiao&K.C.Hsia var.longinectarea S.Y.Tang&S.C.Yueh)2n=24=4m+8st+12t(SAT);短丝贝母(F.dajinensis S.C.Chen)2n=24=4m+6st+14t。其中6种(变种)染色体核型为首次报道。通过染色体核型分析,认为该属染色体核型向对称性减弱的方向发展,推测系统演化上该地理分布的贝母属植物比较原始。
To confirm the chromosome number and analyze the phylogeny of Fritillaria L. from Sichuan province, the number of chromosomes in Fritillaria was oberserved by root tip squashing method; and the karyotype was analyzed. Results showed that the chromosome numbers of ten populations including seven species and two varieties of Fritillaria from Sichuan province were all 24. The karyological fomula are as follows, F. cirrhosa D. DON, 2n=24=2m＋2sm＋10st＋10t; F. delavayi Franch, 2n=24=2m＋2sm＋10st＋10t（SAT）; F. unibracteata Hsiao K. C. Hsia（from Zheduoshan population）, 2n=24=4m＋6st＋14t（SAT）; F.unibracteata（from Maoxian population）, 2n=24=2m＋2sm＋10st＋10t（SAT）; F. wabunesis S. Y. Tang S. C. Yueh, 2n=24=2m＋2sm＋8st＋12t（SAT）; F. przewalskii Maxim. Bata, 2n=24=2m＋2sm＋6st＋14t（SAT）; F. hupehesis Hsiao K. C. Hsia, 2n=24=2m＋2sm＋12st＋8t（SAT）; F. cirrhosa D. DON var. ecirrhosa Franch., 2n=24=4m＋12st＋8t（2SAT）; F. unibracteata Hsiao K. C. Hsia var. longinectarea S. Y. Tang S. C. Yueh, 2n=24=4m＋8st＋12t（SAT）; F. dajinensis S. C. Chen, 2n=24=4m＋6st ＋14t. The karyotype of the sixspecies（varieties） is first reported. The karyotype of Fritillaria might evolve towords the weakeness of symmetry. It was deduced that the Fritillaria populations geographical distrbuted in Sichuan province were more primitive.
出处
《湖北农业科学》
2016年第16期4224-4229,共6页
Hubei Agricultural Sciences
基金
国家"十一五"科技支撑计划项目(2006BAI06A13-1)
