风毛菊属5种植物的核型分析

采用常规压片法,对风毛菊属(Saussurea)5种植物的染色体数目和核型类型进行分析。结果表明:大耳叶风毛菊(S.macrota)核型公式为2n=2x=26=10m+12sm+4st,属2A型;长梗风毛菊(S.dolichopoda)核型公式为2n=2x=26=14m+8sm+4st,属2A型;川陕风毛菊(S.licentiana)核型公式为2n=2x=28=12m+16sm,属2B型;杨叶风毛菊(S.populifolia)核型公式为2n=2x=28=6m+18sm+4st,属2B型;尾叶风毛菊(S.caudata)核型公式为2n=2x=30=14m+14sm+2st,属2A型。这5种风毛菊属植物中,除大耳叶风毛菊染色体数目和核型类型与前人报道的一致外,其余4种植物的染色体数目和核型类型均为首次报道,并在川陕风毛菊中发现1对B染色体。

Karyotype Analysis of Five Saussurea Species

The chromosome number and karyotypes of five Saussurea species were analyzed by traditional squash method.The result showed that:S.macrota was 2n=2x=26=10m+12sm+4st,karyotype belongs to stebbing 2A type.S.dolichopoda was 2n=2x=26=14m+8sm+4st,karyotype belongs to stebbing 2A type.S.licentiana was 2n=2x=28=12m+16sm,karyotype belongs to stebbing 2B type.S.populifolia was 2n=2x=28=6m+18sm+4st,karyotype belongs to stebbing 2B type.S.caudata was 2n=2x=30=14m+14sm+2st,karyotype belongs to stebbing 2A type.In these five species,the chromosome numbers and karyotype of S.macrota species reconfirmed previous reports,while the chromosome numbers and karyotypes of other four species were presented in this paper for the first time,and a pair of B chromosome was discovered in S.licentiana.