Water flow plays a crucial role in the propagation of aquatic invasive plants.Eichhornia crassipes is a major invasive aquatic plant in China,causing significant harm.Using AFLP markers,this study explored the clonal diversity and genetic structure of 14 E.crassipes populations(comprising 399 individuals)from the mid-dle and lower reaches of the Yangtze River.Based on four pairs of AFLP primers,186 loci were identified throughout all populations,including 56 polymorphic loci(30.11％).The populations exhibited low clonal diver-sity(D=0.273)and low genetic diversity(I=0.011,HE=0.017),due to the dominant clonal reproduction sys-tem of the species.Genetic differentiation among populations was minimal(GST=0.019).Analysis of molecu-lar variance(AMOVA)indicated that 1.84％of the genetic variation was attributed to differences among popu-lations,while 98.16％originated from within populations.Additionally,one common genotype was shared by all 14 populations.This study highlighted the significant role of water flow as a primary medium for the disper-sal of E.crassipes in the Yangtze River Basin.Therefore,controlling the dispersal of water flow would be a crucial measure for effectively managing the spread of this species.
关键词
凤眼蓝/克隆多样性/克隆结构/遗传多样性/长江中下游
Key words
Eichhornia crassipes/Clonal diversity/Clonal structure/Genetic diversity/Middle and lower reaches of the Yangtze River
维普
万方数据