Invasion genetics of Chromolaena odorata (Asteraceae): extremely low diversity across Asia

Yu, Xiao; He, Tianhua; Zhao, Jianli; Li, Qiao-Ming

doi:10.1007/s10530-014-0669-2

Cited by 31 publications

(33 citation statements)

References 61 publications

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“…A strong loss of genetic diversity in the invasive range also occurred in Chromolaena odorata (L.) R.M.King & H.Rob. (Yu et al ., ), but our data suggest that niche breadth remained the same. By contrast, North American populations of apomictic Hypericum perforatum L. are genetically relatively diverse (Molins et al ., ) and the species has undergone significant alterations of its niche optimum and has broadened its niche with moderate expansion into new niche space.…”

Section: Discussioncontrasting

confidence: 57%

“…Apomixis hence excludes any recombination and is a way to make clonal lineages spatially mobile. Apomictic taxa generally arise from hybridization in the first place (Asker & Jerling, ; Hörandl, ; Whitton et al ., ; Hojsgaard et al ., ) and usually comprise a set of different clonal lineages (Edwards et al ., ; Paun et al ., ; Yu et al ., ), each of which is supposedly adapted to a slightly different niche optimum (‘frozen’, ‘frozen niche variation model’; Vrijenhoek & Parker, ). This partitioning of niche space has been put forward as one explanation for the recurrent pattern in which apomictic taxa occupy larger and climatically more extreme native areas than their sexual counterparts (geographical parthenogenesis; Kearney, ; Hörandl, ; Hörandl et al ., ).…”

Section: Introductionmentioning

confidence: 99%

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Niche dynamics of alien species do not differ among sexual and apomictic flowering plants

et al. 2015

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Summary Biological invasions can be associated with shifts of the species’ climatic niches but the incidence of such shifts is under debate. The reproductive system might be a key factor controlling such shifts because it influences a species’ evolutionary flexibility. However, the link between reproductive systems and niche dynamics in plant invasions has been little studied so far.We compiled global occurrence data sets of 13 congeneric sexual and apomictic species pairs, and used principal components analysis (PCA) and kernel smoothers to compare changes in climatic niche optima, breadths and unfilling/expansion between native and alien ranges. Niche change metrics were compared between sexual and apomictic species.All 26 species showed changes in niche optima and/or breadth and 14 species significantly expanded their climatic niches. However, we found no effect of the reproductive system on niche dynamics. Instead, species with narrower native niches showed higher rates of niche expansion in the alien ranges.Our results suggest that niche shifts are frequent in plant invasions but evolutionary potential may not be of major importance for such shifts. Niche dynamics rather appear to be driven by changes of the realized niche without adaptive change of the fundamental climatic niche.

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Section: Discussioncontrasting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Niche dynamics of alien species do not differ among sexual and apomictic flowering plants

et al. 2015

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“…The level of genetic diversity of C. odorata plants throughout Asia is significantly lower than that in native populations; similar results were reported by Ye, Mu, Cao, and Ge () and Yu et al (). In introduced ranges, populations of an invader often originate from only few individuals from the native range, and the invasion into a new territory is associated with frequent founder effects, which potentially lead to a decrease in population‐level genetic diversity (Sakai et al, ; Tsutsui, Suarez, Holway, & Case, ; Ye et al, ).…”

Section: Discussionsupporting

confidence: 86%

Postintroduction evolution contributes to the successful invasion of Chromolaena odorata

Zheng

Likun

et al. 2020

Ecology and Evolution

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The evolution of increased competitive ability (EICA) hypothesis states that, when introduced in a novel habitat, invasive species may reallocate resources from costly quantitative defense mechanisms against enemies to dispersal and reproduction; meanwhile, the refinement of EICA suggests that concentrations of toxins used for qualitative defense against generalist herbivores may increase. Previous studies considered that only few genotypes were introduced to the new range, whereas most studies to test the EICA (or the refinement of EICA) hypotheses did not consider founder effects. In this study, genetic and phenotypic data of Chromolaena odorata populations sampled across native and introduced ranges were combined to investigate the role of postintroduction evolution in the successful invasion of C. odorata. Compared with native populations, the introduced populations exhibited lower levels of genetic diversity. Moreover, different founder effects events were interpreted as the main cause of the genetic structure observed in introduced ranges. Three Florida, two Trinidad, and two Puerto Rico populations may have been the sources of the invasive C. odorata in Asia. When in free of competition conditions, C. odorata plants from introduced ranges perform better than those from native ranges at high nutrient supply but not at low nutrient level. The differences in performance due to competition were significantly greater for C. odorata plants from the native range than those from the introduced range at both nutrient levels. Moreover, the differences in performance by competition were significantly greater for putative source populations than for invasive populations. Quantities of three types of secondary compounds in leaves of invasive C. odorata populations were significantly higher than those in putative source populations. These results provide more accurate evidence that the competitive ability of the introduced C. odorata is increased with postintroduction evolution.

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“…This appeared to be a founder haplotype for H3, H6, H7, H8, and H13. This star-like pattern of H1 in the network suggests a rapid demographic expansion and evolution from a small founding population [28,29]. In addition, haplotypes H17, H18, H19, and H20 from Mexico were identified and exhibited numerous mutational steps from H11, suggesting remote phylogenetic relationship and significant genetic divergence among Mexican haplotypes.…”

Section: Phylogenetic Analysismentioning

confidence: 86%

Genetic variation and phylogenetic relationship analysis of Jatropha curcas L. inferred from nrDNA ITS sequences

Guo

Chen

Shi

et al. 2016

Comptes Rendus. Biologies

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Invasion genetics of Chromolaena odorata (Asteraceae): extremely low diversity across Asia

Cited by 31 publications

References 61 publications

Niche dynamics of alien species do not differ among sexual and apomictic flowering plants

Niche dynamics of alien species do not differ among sexual and apomictic flowering plants

Postintroduction evolution contributes to the successful invasion of Chromolaena odorata

Genetic variation and phylogenetic relationship analysis of Jatropha curcas L. inferred from nrDNA ITS sequences

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