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Wolffia Horkel ex Schleid.(Lemnaceae) includes the world’s smallest angiosperms.Morphologically,their bodies are extremely simplified,making classification difficult and long-disputed.No reports about the genetic structure of these clonal-dominant aquatic plants have been published until now.In this study,of 247 samples from 42 populations spanning representative locations in China,two chloroplast haplotypes (glo-cp and un-cp) and 66 amplified fragment length polymorphism genotypes were identified.Based on wide sampling,cpDNA haplotypes,and amplified fragment length polymorphism profiles,we found that there are two genetic lineages (glo- and unlineages) of Wolffia species in China.Genotypic and genetic diversity of Wolffia species are high compared with other clonal plants (Simpson’s index,D =0.97; Nei’s diversity,H =0.1835).Different spatial structure patterns were detected between glo- and un- lineages.Positive autocorrelation at short distances (<400 km) and slightly negative autocorrelations at larger distances (> 1500 km) were detected within the glo-lineage,but no significant spatial genetic structure was detected beyond 100 km within the un-lineage.Overall,spatial genetic analysis of W.globosa revealed significant autocorrelation within short distances,indicating that restricted gene flow might be one of the most important factors in shaping genetic structure. 相似文献
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Yang Song-Lin Yu Da-Ming Liu Gui-Dong Lin Qi Zhai Xiang Wang Ling-Ling 《Plasmonics (Norwell, Mass.)》2018,13(3):1015-1020
Plasmonics - The perfect plasmon-induced absorption (PIA) effect is achieved in a simple plasmonic system, composed of two rectangle cavities side-coupled to the metal-insulator-metal (MIM)... 相似文献