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Principle component analysis of 62 Nymphoides cristata samples. Principle components 1 and 2 account for 96.1% of cumulative variation. Colored ellipses (non-statistical) were added a posteriori to denote putative genetic lineages identified by ordination.
Source publication
Crested floating heart [ Nymphoides cristata (Roxb.) Kuntze] is an invasive aquatic plant in the southeastern United States. For clonal plants like N. cristata , clonal diversity may influence response to control tactics and/or evolutionary potential. However, little is known about the diversity of introduced N. cristata . In this study, we used ge...
Contexts in source publication
Context 1
... survey of N. cristata diversity identified three distinct genetic groups (Figure 1). We refer to those groups as genetic lineages, collections of closely related individuals distinguished by the genomic variants (i.e., SNPs) inherited from a common ancestor. ...
Context 2
... introduction of three distinct lineages provides opportunities for genetic admixture and the generation of novel genetic variants in the introduced range (e.g., Facon et al. 2008;Kolbe et al. 2004;Lavergne & Molofsky 2007). Although interspecific hybrids between N. cristata and native N. aquatica have been identified in the Santee Cooper Reservoir system in South Carolina (Harms et al. 2021), we did not find any evidence for sexual reproduction among the three lineages, as evidenced by the lack of genetically intermediate individuals (Figure 1). In addition, the average pairwise genetic distances between individuals were approximately 97% greater when comparing between lineages versus within lineages. ...
Context 3
... introduction of three distinct lineages provides opportunities for genetic admixture and the generation of novel genetic variants in the introduced range (e.g., Facon et al. 2008;Kolbe et al. 2004;Lavergne & Molofsky 2007). Although interspecific hybrids between N. cristata and native N. aquatica have been identified in the Santee Cooper Reservoir system in South Carolina (Harms et al. 2021), we did not find any evidence for sexual reproduction among the three lineages, as evidenced by the lack of genetically intermediate individuals (Figure 1). In addition, the average pairwise genetic distances between individuals were approximately 97% greater when comparing between lineages versus within lineages. ...