Genetic variation and bidirectional gene flow in the riparian plant <i>Miscanthus lutarioriparius</i>, across its endemic range: implications for adaptive potential

Yan, Juan; Zhu, Mingdong; Liu, Wei; Xu, Qin; Zhu, Caiyun; Li, Jianqiang; Su, Tao

doi:10.1111/gcbb.12278

Cited by 32 publications

(41 citation statements)

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“…Monmonier's maximum difference algorithm with BARRIER 2.2 was used to determine the main genetic discontinuities among populations (Manni et al, 2004) based on the matrix of F ST (Weir and Cockerham, 1984) for each of the 10 loci separately. Only barriers supported by at least half of the loci (i.e., ≥5 loci) were allowed as "consensus barriers" (Yan et al, 2016), namely main barriers.…”

Section: Population Cluster and Genetic Discontinuity Among Populationsmentioning

confidence: 99%

“…Likewise, species' genetic diversity can significantly contribute to their adaptability to ever-changing environments (Hughes et al, 2008). Therefore, a good understanding of gene flow patterns and genetic diversity could help effective protection of endangered species and quality management of economically or ecologically important species (Yan et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…One of the major topics of landscape genetics is to identify potential barriers or corridors for dispersal (Guillot et al, 2005;Storfer et al, 2007). For example, rivers, which facilitate movement of individuals and genes across the landscape, are generally recognized as corridors for riparian or aquatic plants (Chen et al, 2012a,b;Yan et al, 2016). On the other hand, mountain ridges as geographical barriers may hinder gene flow and cause genetic differentiation in plants (Tsuda et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, wild Z. latifolia populations not only have important ecological functions in aquatic ecosystems, but also are important genetic resources. Understanding genetic diversity of the valuable species would help effectively implement conservation practices for the species and rationally utilize the genetic resources (Yan et al, 2016). Abundant genetic variations with weak population structure were previously reported using ten nuclear microsatellites markers in Z. latifolia from lakes of the Middle-lower Yangtze Plain, a potamo-lacustrine system in central China (Chen et al, 2012a).…”

Section: Introductionmentioning

confidence: 99%

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Landscape-Scale Genetic Structure of Wild Rice Zizania latifolia: The Roles of Rivers, Mountains and Fragmentation

et al. 2017

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Wild rice (Zizania latifolia) is an important genetic resource and it has important ecological functions in aquatic ecosystems as well. Here, we used landscape genetics to investigate how the landscape features, including rivers, mountains and habitat fragmentation, affect the genetic connectivity or create dispersal barriers for Z. latifolia. In this report, seventeen populations from the Sanjiang Plain and its surrounding areas were genotyped by ten microsatellite markers. A high genetic differentiation and genetic discontinuity were found among populations within each river investigated, suggesting that the rivers be not acting as corridors for dispersal. Meanwhile, genetic discontinuity was detected from different sides of the Lesser Khingan and its branch, the Qinghei Mountains, demonstrating that gene flow was blocked by the complex topography of mountains. The results that historical gene flow was much higher than the contemporary gene flow might infer that recent habitat fragmentation resulted in decreased gene flow. For all sampled Z. latifolia populations, the result of low level of genetic variation (n a = 2.3, H E = 0.328) and high genetic divergence (F ST = 0.405, D est = 0.414 and Ø pt = 0.424) was consistent with the decreased gene flow, an inbreeding system and repeated genetic bottlenecks. A conservation strategy for protecting as many populations as possible to maximize genomic representation of the species is proposed. In addition, dredging the watercourses should be carried out to improve habitat stability and to facilitate connectivity among populations.

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Section: Population Cluster and Genetic Discontinuity Among Populationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Landscape-Scale Genetic Structure of Wild Rice Zizania latifolia: The Roles of Rivers, Mountains and Fragmentation

et al. 2017

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“…Although, DNA fragment sequences revealed numerous cryptic species lacking morphological differentiation in both animals and plants (Myers et al, 2013; Su et al, 2015), they sometimes fail when groups are closely related species, let alone evolutionary complex. At present, simple sequence repeats (SSR) are widely used to characterize divergence among closely related species (e.g., Surget-Groba and Kay, 2013; Yan et al, 2015; Duncan et al, 2016). Here we present the first evidence of gene flow in a plant species complex in the Qinghai-Tibetan Plateau (QTP) based on SSR loci.…”

Section: Introductionmentioning

confidence: 99%

Gene Flow Results in High Genetic Similarity between Sibiraea (Rosaceae) Species in the Qinghai-Tibetan Plateau

Gao

Zhang

et al. 2016

Front. Plant Sci.

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Studying closely related species and divergent populations provides insight into the process of speciation. Previous studies showed that the Sibiraea complex's evolutionary history on the Qinghai-Tibetan Plateau (QTP) was confusing and could not be distinguishable on the molecular level. In this study, the genetic structure and gene flow of Sibiraea laevigata and Sibiraea angustata on the QTP was examined across 45 populations using 8 microsatellite loci. Microsatellites revealed high genetic diversity in Sibiraea populations. Most of the variance was detected within populations (87.45%) rather than between species (4.39%). We found no significant correlations between genetic and geographical distances among populations. Bayesian cluster analysis grouped all individuals in the sympatric area of Sibiraea into one cluster and other individuals of S. angustata into another. Divergence history analysis based on the approximate Bayesian computation method indicated that the populations of S. angustata at the sympatric area derived from the admixture of the 2 species. The assignment test assigned all individuals to populations of their own species rather than its congeneric species. Consistently, intraspecies were detected rather than interspecies first-generation migrants. The bidirectional gene flow in long-term patterns between the 2 species was asymmetric, with more from S. angustata to S. laevigata. In conclusion, the Sibiraea complex was distinguishable on the molecular level using microsatellite loci. We found that the high genetic similarity of the complex resulted from huge bidirectional gene flow, especially on the sympatric area where population admixtures occurred. This study sheds light on speciation with gene flow in the QTP.

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Connectivity in riparian plants: influence of vegetation type and habitat fragmentation overrides water flow

Hopley¹,

Byrne²

2018

Oecologia

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Spatial genetic patterns can be influenced by a broad range of factors across a landscape. The hypothesis that heterogeneous vegetation and habitat fragmentation rather than water flow influence genetic patterns in two riparian plant species with different niches was tested. Genotyping by sequencing was used to assess the genetic diversity and structure of each species at 12 sites across a river catchment. Generalized dissimilarity modelling examined the relative influence that vegetation type and habitat fragmentation had on patterns of genetic differentiation across the landscape. Restricted gene flow in the widespread species, Callistachys lanceolata, resulted in lower genetic differentiation than that exhibited by Astartea leptophylla, a restricted riparian species with high gene flow. Geographic distance and vegetation type explained the patterns of genetic differentiation in the widespread species, whereas habitat fragmentation and, to a lesser extent, vegetation type explained patterns in the restricted species. Water flow was not found to have significant impacts on patterns of genetic diversity in riparian plant species with restricted and widespread distribution. Impacts of vegetation type on genetic differentiation were most likely due to change in canopy density and associated pollinator communities in the vegetation types across the catchment. Reduced connectivity caused by habitat fragmentation was evident in the restricted riparian species, while reduced connectivity in the widespread species was related to the change of vegetation type between sites. Natural causes of reduced connectivity as well as anthropogenic causes need to be considered in future work to predict persistence and resilience under a changing climate.

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Genetic variation and bidirectional gene flow in the riparian plant Miscanthus lutarioriparius, across its endemic range: implications for adaptive potential

Cited by 32 publications

References 100 publications

Landscape-Scale Genetic Structure of Wild Rice Zizania latifolia: The Roles of Rivers, Mountains and Fragmentation

Landscape-Scale Genetic Structure of Wild Rice Zizania latifolia: The Roles of Rivers, Mountains and Fragmentation

Gene Flow Results in High Genetic Similarity between Sibiraea (Rosaceae) Species in the Qinghai-Tibetan Plateau

Connectivity in riparian plants: influence of vegetation type and habitat fragmentation overrides water flow

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