Cytotaxonomy and breeding system of the genusBiscutella (Cruciferae)

Olowokudejo, J. D.; Heywood, V. H.

doi:10.1007/bf00983955

Cited by 34 publications

(24 citation statements)

References 17 publications

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“…Such a reproductive barrier may explain observed patterns of local adaptation affecting the structure of most AFLP loci. However, B. laevigata presents a sporophytic self‐incompatibility system enforcing admixture and promoting kin avoidance (Olowokudejo & Heywood, 1984). Phenological divergence is thus the most straightforward counteracting mechanism that could promote assortative mating in continuous plant populations (Fox, 2003).…”

Section: Discussionmentioning

confidence: 99%

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Genome‐wide association to fine‐scale ecological heterogeneity within a continuous population ofBiscutella laevigata(Brassicaceae)

Parisod

Christin

2008

New Phytologist

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Summary• Gene flow, drift and selection can be detected through different signatures across the genome and the landscape. Genetic discontinuities along with their correlation to environmental features can be used to tease out isolation-by-distance and isolationby-time from processes related to selection.• Using spatial statistics (spatial autocorrelation methods, canonical correspondence analysis and partial Mantel tests) dealing with genome-wide amplified fragment length polymorphism (AFLP) under unlikely Hardy-Weinberg assumptions, this study investigates 124 individuals within a continuous population of the autopolyploid Biscutella laevigata (Brassicaceae).• Fine-scale spatial genetic structure was strong and the mosaic-like distribution of AFLP genotypes was consistently associated with habitat factors, even when controlled for geographical distances. The use of multivariate analyses enabled separation of the factors responsible for the repartition of the genetic variance and revealed a composite effect of isolation by distance, phenological divergence and local adaptation to habitats characterised by different solar radiation regimes.• These results suggest that the immigrant inviability barrier facilitated the maintenance of adapted subpopulations to distinct environmental conditions at the local scale.

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Section: Discussionmentioning

confidence: 99%

“…Biscutella laevigata L. (Brassicaceae) is a spring blooming, long‐lived perennial species with a sporophytic self‐incompatibility system (Olowokudejo & Heywood, 1984). Pollen dispersal is achieved by generalist Diptera and Lepidoptera, while seeds are passively dispersed by gravity and wind.…”

Section: Introductionmentioning

confidence: 99%

Genome‐wide association to fine‐scale ecological heterogeneity within a continuous population ofBiscutella laevigata(Brassicaceae)

Parisod

Christin

2008

New Phytologist

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“…It is a long-lived perennial and outcrossing species with a sporophytic self-incompatibility system (Olowokudejo and Heywood, 1984). Pollen dispersal is achieved by generalist Diptera and Lepidoptera, and seeds are mainly dispersed by gravity and wind.…”

Section: Methodsmentioning

confidence: 99%

“…The mating system and the perennial life history of B. laevigata may have helped to maintain genetic diversity despite founder effects. The species has a sporophytic self-incompatibility system (Olowokudejo and Heywood, 1984), implying that isolated individuals cannot self or reproduce with close relatives and are confronted with limited mate availability (C Parisod, personal observation). Marginal colonizers are therefore dependant on long-distance pollen dispersal from neighbouring patches to find compatible mates after foundation.…”

Section: Polarised Recolonization Of the Valleymentioning

confidence: 99%

Fine-scale genetic structure and marginal processes in an expanding population of Biscutella laevigata L. (Brassicaceae)

Parisod

Bonvin

2008

Heredity

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Evolutionary processes acting at the expanding margins of a species' range are still poorly understood. Genetic drift is considered prevalent in marginal populations, and the maintenance of genetic diversity during recolonization might seem puzzling. To investigate such processes, a fine-scale investigation of 219 individuals was performed within a population of Biscutella laevigata (Brassicaceae), located at the leading edge of its range. The survey used amplified fragment length polymorphisms (AFLPs). As commonly reported across the whole species distribution range, individual density and genetic diversity decreased along the local axis of recolonization of this expanding population, highlighting the enduring effect of the historical colonization on present-day diversity. The self-incompatibility system of the plant may have prevented local inbreeding in newly found patches and sustained genetic diversity by ensuring gene flow from established populations. Within the more continuously populated region, spatial analysis of genetic structure revealed restricted gene flow among individuals. The distribution of genotypes formed a mosaic of relatively homogenous patches within the continuous population. This pattern could be explained by a history of expansion by longdistance dispersal followed by fine-scale diffusion (that is, a stratified dispersal combination). The secondary contact among expanding patches apparently led to admixture among differentiated genotypes where they met (that is, a reshuffling effect). This type of dynamics could explain the maintenance of genetic diversity during recolonization.

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“…laevigata is a perennial plant, strictly allogamous, with a developed system of sporophytic self-incompatibility [23]. Field studies indicate that B. laevigata flowers are mainly pollinated by the Diptera order [24].…”

Section: Dianthus Carthusianorum Armeria Maritima Silene Vulgaris mentioning

confidence: 99%

Microevolution on Anthropogenically Changed Areas on the Example of Biscutella laevigata Plants from Calamine Waste Heap in Poland

Wierzbicka¹,

Pielichowska²,

Bemowska-Kałabun³

et al. 2017

J Environ Anal Toxicol

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Cytotaxonomy and breeding system of the genusBiscutella (Cruciferae)

Cited by 34 publications

References 17 publications

Genome‐wide association to fine‐scale ecological heterogeneity within a continuous population ofBiscutella laevigata(Brassicaceae)

Genome‐wide association to fine‐scale ecological heterogeneity within a continuous population ofBiscutella laevigata(Brassicaceae)

Fine-scale genetic structure and marginal processes in an expanding population of Biscutella laevigata L. (Brassicaceae)

Microevolution on Anthropogenically Changed Areas on the Example of Biscutella laevigata Plants from Calamine Waste Heap in Poland

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