AFLP Genome Scan to Detect Genetic Structure and Candidate Loci under Selection for Local Adaptation of the Invasive Weed Mikania micrantha

Wang, Ting; Chen, Guopei; Zan, Qijie; Wang, Chunbo; Su, Yingjuan

doi:10.1371/journal.pone.0041310

Cited by 44 publications

(62 citation statements)

References 119 publications

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“…Evidently, high soil salinity combined with waterlogging inhibited the colonization of the above‐mentioned species into the mangrove forest, whereas high soil salinity alone failed to suppress the invaders. Genetic analyses have supported the strong capability of M. micrantha to adaptively evolve in response to salt stress (Guo et al, ; Wang, Chen, Zan, Wang, & Su, ). Hence, the incidence of the successful invasion of M. micrantha into Shenzhen Bay suggests that some populations may have rapidly evolved strong salt tolerance.…”

Section: Introductionmentioning

confidence: 96%

Salt‐tolerant native plants have greater responses to other environments when compared to salt‐tolerant invasive plants

Liu

Liao

Shaolin

2019

Ecology and Evolution

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The strong expansion potential of invasive plants is often attributed to fast adaptive responses to stress. However, the evolution of tolerance to one stressor may affect the responses to other stressors. Currently, it remains unclear what effect the evolution to one stressor might have on the responses to other single or combined stressors. Moreover, it is unknown how this might differ between invasive and native species. Invasive plants ( Mikania micrantha and Bidens pilosa ) and native plants ( Merremia hederacea and Sida acuta ) from low‐ and high‐salinity habitats were grown under control and stressful conditions [salt stress, water stress (drought/waterlogging), and their combinations]. We explored the effects of evolved salt tolerance on the responses to water stress/combined stresses and the underlying trait mechanisms. The high‐salinity populations of all species exhibited stronger salt tolerance than the low‐salinity populations. As to the tolerance to other stressors, the high‐salinity and low‐salinity populations of the invasive species were similar, whereas the high‐salinity populations of the native species exhibited stronger tolerance than the low‐salinity populations under most stress treatments. However, the enhanced salt tolerance in native species was accompanied by reduced total biomass under control condition. The stress tolerance of native species correlated with leaf production rate and allocation to root, while the performance of native species under control condition correlated with leaf morphology and carbon assimilation rate. This suggests a trade‐off between salt tolerance and performance in the native but not the invasive species, probably resulting from altered phenotypic/physiological traits. Synthesis Our work suggests that the evolution of tolerance to one stressor may have stronger effects on the tolerance to other stressors of the native compared with the invasive species. This may be a new paradigm to explain the greater advantage of invasive vs. native species in highly stressful habitats.

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Section: Introductionmentioning

confidence: 96%

Salt‐tolerant native plants have greater responses to other environments when compared to salt‐tolerant invasive plants

Liu

Liao

Shaolin

2019

Ecology and Evolution

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“…AFLP markers have found the widest application in assessing the variability and genetic structure of populations in a variety of plants [47]–[53] and once again have proven to be invaluable tools in describing the former. Despite its historical significance and value, the genetic diversity and structure of Dalmatian pyrethrum has never been investigated; therefore, this study using AFLP markers represents the first such attempt.…”

Section: Introductionmentioning

confidence: 99%

Genetic Diversity and Structure of Dalmatian Pyrethrum (Tanacetum cinerariifolium Trevir. /Sch./ Bip., Asteraceae) within the Balkan Refugium

et al. 2014

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Dalmatian pyrethrum (Tanacetum cinerariifolium Trevir. /Sch./ Bip.) is an outcrossing, perennial insecticidal plant, restricted to the eastern Adriatic coast (Mediterranean). Amplified fragment-length polymorphisms (AFLP) were used to investigate the genetic diversity and structure within and among 20 natural plant populations. The highest level of gene diversity, the number of private alleles and the frequency down-weighted marker values (DW) were found in northern Adriatic populations and gradually decreased towards the southern boundary of the species range. Genetic impoverishment of these southern populations is most likely the result of human-related activities. An analysis of molecular variance (AMOVA) indicated that most of the genetic diversity was attributed to differences among individuals within populations (85.78%), which are expected due to the outcrossing nature of the species. A Bayesian analysis of the population structure identified two dominant genetic clusters. A spatial analysis of the genetic diversity indicated that 5.6% of the genetic differentiation resulted from isolation by distance (IBD), while 12.3% of the genetic differentiation among populations followed the pattern of isolation by environmental distance (IBED). Knowledge of the genetic diversity patterns of the natural populations and the mechanism behind these patterns is required for the exploitation and possible conservation management of this endemic and economically important species.

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“…In the case of model organisms, it is easy to track the “outlier locus” under selection based on whole-genome information, whereas for non-model organisms, such as P. australis , it is difficult to identify candidate genes due to restricted genomic resources (Wang et al, 2012). AFLPs have frequently been used to scan genomes in non-model organisms.…”

Section: Discussionmentioning

confidence: 99%

Small-Scale Habitat-Specific Variation and Adaptive Divergence of Photosynthetic Pigments in Different Alkali Soils in Reed Identified by Common Garden and Genetic Tests

Tian

Jiang

et al. 2017

Front. Plant Sci.

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Flexibility of photosynthetic pigment traits is an important adaptive mechanism through which plants can increase mean fitness in a variable environment. Unlike morphological traits in plants, photosythesis has been shown to exhibit phenotypic plasticity, responding rapidly to environmental conditions. Meanwhile, local adaptation at small scales is considered to be rare. Thus, detecting the small-scale adaptive divergence of photosynthetic pigments presents a challenge. Leaf concentrations of photosynthetic pigments under stressful conditions may be reduced or maintained. Concentrations of some pigments and/or ratio of Chlorophyll a (Chla) to Chlorophyll b (Chlb) do not change markedly in some species, such as the common reed, Phragmites australis, a cosmopolitan grass and common invader. Little is known about photosynthetic responses of this plant to varying levels of alkali salt. Few studies have attempted to account for the relationship between pigment accumulation and leaf position in wild plant populations in grasslands. In this study, photosynthetic pigment concentrations and the total Chl(a+b)/Car ratio decreased as the growing season progressed and were shown to be significantly lower in the habitat with a higher soil pH value and less moisture when compared between habitats. The Chla/Chlb ratio did not differ significantly between habitats, although it increased significantly over time. Leaves in the middle position may be functionally important in the response to soil conditions because only pigment concentrations and the Chl(a+b)/Car ratio of those leaves varied between habitats significantly. The outlier loci, used to evaluate molecular signatures of selection, were detected by Arlequin, Bayescan, and Bayenv analyses. In the simulated habitats of common garden, the local genotypes had higher values of Chla, Chlb, Chl(a+b), Car in their home habitat than did genotypes originating from the other habitat. QST–FST comparisons provided evidence of divergent selection. It appears likely that soil moisture, pH and electric conductivity drove local adaptation. Combined approaches that utilize information on phenotypes from field and common garden experiments, genome-wide markers, and environmental data will be the most informative for understanding the adaptive nature of the intraspecific divergence.

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AFLP Genome Scan to Detect Genetic Structure and Candidate Loci under Selection for Local Adaptation of the Invasive Weed Mikania micrantha

Cited by 44 publications

References 119 publications

Salt‐tolerant native plants have greater responses to other environments when compared to salt‐tolerant invasive plants

Salt‐tolerant native plants have greater responses to other environments when compared to salt‐tolerant invasive plants

Genetic Diversity and Structure of Dalmatian Pyrethrum (Tanacetum cinerariifolium Trevir. /Sch./ Bip., Asteraceae) within the Balkan Refugium

Small-Scale Habitat-Specific Variation and Adaptive Divergence of Photosynthetic Pigments in Different Alkali Soils in Reed Identified by Common Garden and Genetic Tests

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