Phenotypic and genetic differentiation between native and introduced plant populations

Animal pollinators mediate gene flow among plant populations, but, in contrast to well-studied topographic and (Pleistocene) environmental isolating barriers, their impact on population genetic differentiation remains largely unexplored. Comparatively investigating how these multifarious factors drive microevolutionary histories is, however, crucial for better resolving macroevolutionary patterns of plant diversification. We here combined genomic analyses with landscape genetics and niche modelling across six related Neotropical plant species (424 individuals across 33 localities) differing in pollination strategy to test the hypothesis that highly mobile (vertebrate) pollinators more effectively link isolated localities than less mobile (bee) pollinators. We found consistently higher genetic differentiation (FST) among localities of bee- than vertebrate-pollinated species with increasing geographic distance, topographic barriers and historic climatic instability. High admixture among montane populations further suggested relative climatic stability of Neotropical montane forests during the Pleistocene. Overall, our results indicate that pollinators may differentially impact the potential for allopatric speciation, thereby critically influencing diversification histories at macroevolutionary scales.

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Pollen dispersal, pollen immigration, mating and genetic diversity in restoration of the southern plains Banksia

Biological Journal of the Linnean Society ◽

10.1093/biolinnean/blaa003 ◽

2020 ◽

Vol 129 (4) ◽

pp. 773-792

Author(s):

Melissa A Millar ◽

David J Coates ◽

Margaret Byrne ◽

Siegfried L Krauss ◽

Matthew R Williams ◽

...

Keyword(s):

Genetic Diversity ◽

Genetic Differentiation ◽

Mating System ◽

Mating Systems ◽

Pollen Dispersal ◽

Floral Display ◽

Molecular Tools ◽

Plant Populations ◽

Southern Plains ◽

Population Fitness

Abstract Evaluation of patterns of pollen dispersal, mating systems, population fitness, genetic diversity and differentiation in restoration and remnant plant populations can be useful in determining how well restoration activities have achieved their objectives. We used molecular tools to assess how well restoration objectives have been met for populations of Banksia media in the biodiversity hotspot of south-west Western Australia. We characterized patterns of pollen dispersal within, and pollen immigration into, two restoration populations. We compared mating system parameters, population fitness via seed weight, genetic diversity and genetic differentiation for restoration and associated reference remnant populations. Different patterns of pollen dispersal were revealed for two restoration sites that differed in floral display, spatial aggregation of founders and co-planted species. Proximity to remnant native vegetation was associated with enhanced immigration and more short-range pollen dispersal when other population variables were constant. Greater seed weights at remnant compared to restoration populations were not related to outcrossing rate. Equivalent mating system and genetic diversity parameters and low to moderate levels of genetic differentiation between restoration and remnant populations suggest pollinator services have been restored in genetically diverse restoration populations of local provenance B. media as early as four years from planting.

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Breeding systems, gene flow and level of genetic differentiation in plant populations

Lankesteriana ◽

10.15517/lank.v3i2.23023 ◽

2016 ◽

Vol 3 (2) ◽

Author(s):

Oscar Rocha

Keyword(s):

Genetic Variation ◽

Gene Flow ◽

Genetic Differentiation ◽

Mating Systems ◽

Title Page ◽

Breeding Systems ◽

Plant Populations

<div class="page" title="Page 1"><div class="layoutArea"><div class="column"><p><span>Genetic variation and its distribution among plant populations are primarily determined by their breed- ing system and the level of gene flow among them (Bawa </span><span>et al. </span><span>1985, Bawa </span><span>et al. </span><span>1990, Rocha & Aguilar 2001b). It is well known that mating systems influence the amount, as well as the distribution of the genetic variation within and among populations (Wright 1921, Stebbins 1950, 1957, Hamrick </span><span>et al. </span><span>1991). </span></p></div></div></div>

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Spatial isolation and genetic differentiation in naturally fragmented plant populations of the Swiss Alps

Journal of Plant Ecology ◽

10.1093/jpe/rtn009 ◽

2008 ◽

Vol 1 (3) ◽

pp. 149-159 ◽

Cited By ~ 30

Author(s):

P. Kuss ◽

A. R. Pluess ◽

H. H. Aegisdottir ◽

J. Stocklin

Keyword(s):

Genetic Differentiation ◽

Swiss Alps ◽

Plant Populations ◽

Spatial Isolation

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Population genetics of Liriomyza trifolii (Diptera: Agromyzidae) and comparison with four Liriomyza species in China based on COI, EF-1a and microsatellites loci

Scientific Reports ◽

10.1038/s41598-019-53886-9 ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 1

Author(s):

Jing-Yun Chen ◽

Ya-Wen Chang ◽

Xiao-Tian Tang ◽

Si-Zhu Zheng ◽

Yu-Zhou Du

Keyword(s):

Population Genetics ◽

Genetic Differentiation ◽

Southern China ◽

Growth Period ◽

Effective Control ◽

Plant Populations ◽

Steady Growth ◽

Geographical Regions ◽

Northern Regions ◽

Large Genus

AbstractLiriomyza is a large genus that includes polyphagous and invasive species (L. trifolii, L. sativae, and L. huidobrensis), and oligophagous species such as L. Chinensis in China. Effective control of these invasive and oligophagous species is not easy due to the fast invasion rate, interspecific competition, and pesticide resistance. In this study, we investigated population genetics of five Liriomyza species L. trifolii, L. sativae, L. huidobrensis, L. bryoniae, and L. chinensis based on COI and EF-1a genes, and microsatellite DNA. These five Liriomyza species revealed highly conservative characteristics in the COI gene among populations collected from different geographical regions and host plants. By contrast, the mutation rate of the EF-1a gene was higher than COI, and phylogenetic tree based on EF-1a showed that haplotypes of L. trifolii and L. sativae were not distinguished well. Genetic differentiation in microsatellite loci was obvious among the five species. Our results also indicated that geographic isolation had a greater impact on genetic differentiation in L. trifolii than the host plant. Populations of L. trifolii in China showed a high to moderate level of genetic differentiation and they had divided into two groups representing the coastal areas of southern China and northern regions. The genetic diversity of the southern group was higher than the northern group. We speculated that the invasion of L. trifolii likely occurred in southern regions of China and then spread northward. Bottleneck analyses revealed that the L. trifolii population in China was in a steady growth period.

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