【摘要】 通过核型和等位酶分析 ,对短葶飞蓬 (Erigeronbreviscapus)种群遗传结构进行了较全面的研究。研究材料来自丽江、昆明、邱北。核型分析表明 ,这 3个种群都为二倍体种群(2n =2x =18) ,以丽江种群为例 ,短葶飞蓬核型为 2n =2x =18=6m +10sm (2SAT ) +2st。 10种酶的等位酶分析表明 ,短葶飞蓬的遗传变异存在于种群内。种群间遗传一致度高 (I =0 9172 ) ,遗传距离小 (D =0 0 876)。遗传距离与空间距离大致成正相关。更多还原

【Abstract】 In this paper, the population genetic structure of Erigeron breviscapus in three population of Yunnan was studied by the karyotype analysis and allozyme analysis. Lijiang, Kunming and Qiubei populations were sampled. Karyotype analysis indicated that all the three populations are diplontic (2n=2x=18). The karyotype formula of Lijiang population is: 2n=2x=18=6m+10sm(2SAT)+2st. Ten allozyme analyses show that, the genetic variation exists within the populations. The genetic identities in the three populations are very high (I=0.9172),and the genetic distances are very small (D=0.0876).The genetic distances are positively related to the spatial distances.更多还原