Recent speciation associated with range expansion and a shift to self-fertilization in North American Arabidopsis

Willi, Yvonne; Bachmann, Olivier; Walden, Nora

doi:10.1038/s41467-022-35368-1

Cited by 8 publications

(7 citation statements)

References 64 publications

(90 reference statements)

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“…If stigma- and pollen proteins have matching specificities (as would be the case with self-pollination), pollen tubes cannot grow, thus preventing fertilization 4 – 6 . Self-incompatibility frequently breaks down 7 , 8 , and many extant self-compatible and selfing species have evolved from self-incompatible ancestors 9 – 14 . Since the loss of self-incompatibility is the first step towards the evolution of selfing, it is of particular interest to understand its underlying genetic basis.…”

Section: Introductionmentioning

confidence: 99%

Breakdown of self-incompatibility due to genetic interaction between a specific S-allele and an unlinked modifier

Mamonova

Köhler

et al. 2023

Nat Commun

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Breakdown of self-incompatibility has frequently been attributed to loss-of-function mutations of alleles at the locus responsible for recognition of self-pollen (i.e. the S-locus). However, other potential causes have rarely been tested. Here, we show that self-compatibility of S1S1-homozygotes in selfing populations of the otherwise self-incompatible Arabidopsis lyrata is not due to S-locus mutation. Between-breeding-system cross-progeny are self-compatible if they combine S1 from the self-compatible cross-partner with recessive S1 from the self-incompatible cross-partner, but self-incompatible with dominant S-alleles. Because S1S1 homozygotes in outcrossing populations are self-incompatible, mutation of S1 cannot explain self-compatibility in S1S1 cross-progeny. This supports the hypothesis that an S1-specific modifier unlinked to the S-locus causes self-compatibility by functionally disrupting S1. Self-compatibility in S19S19 homozygotes may also be caused by an S19-specific modifier, but we cannot rule out a loss-of-function mutation of S19. Taken together, our findings indicate that breakdown of self-incompatibility is possible without disruptive mutations at the S-locus.

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Section: Introductionmentioning

confidence: 99%

Breakdown of self-incompatibility due to genetic interaction between a specific S-allele and an unlinked modifier

Mamonova

Köhler

et al. 2023

Nat Commun

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“…The functional relevance of several genes that appeared in our climate GWAS needs to be validated in A. halleri , and common garden experiments in multiple locations in Japan would be helpful for such validations. We would also like to note that not only adaptation to temperature or precipitation, the evolution of mating systems and polyploidy is often suggested to be associated with population demographic changes during LGP and post-glacial expansions (Durvasula et al, 2017; Novikova et al, 2017; Tsuchimatsu et al, 2012, 2010; Willi et al, 2022). Investigation of further phenotypic variation and its genetic basis will be valuable for a better understanding of climate adaptation mechanisms.…”

Section: Discussionmentioning

confidence: 99%

Population genomics reveals demographic history and climate adaptation in JapaneseArabidopsis halleri

Suda,

Kubota,

Kumar

et al. 2024

Preprint

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Climate oscillations in the Quaternary forced species to major latitudinal or altitudinal range shifts. It has been suggested that adaptation concomitant with range shifts plays key roles in species responses during climate oscillations, but the role of selection for local adaptation to climatic changes remains largely unexplored. Here, we investigated population structure, demographic history, and signatures of climate-driven selection based on genome-wide polymorphism data of 141 JapaneseArabidopsis halleriindividuals, with European ones as outgroups. Coalescent-based analyses suggested a genetic differentiation between Japanese subpopulations since the Last Glacial Period (LGP), which would have contributed to shaping the current pattern of population structure. Population demographic analysis revealed the population size fluctuations in the LGP, which were particularly prominent since the subpopulations started to diverge (~50 kya). The ecological niche modeling predicted the range shifts from southern coastal regions to northern coastal and mountainous areas, possibly in association with the population size fluctuations. Through genome-wide association analyses of bioclimatic variables and selection scans, we investigated whether climate-associated loci are enriched in the extreme tails of selection scans, and demonstrated the prevailing signatures of selection, particularly toward a warmer climate in southern subpopulations and a drier environment in northern subpopulations, which may have taken place during or after the LGP. Our study highlights the importance of integrating climate associations, selection scans, and population demographic analyses for identifying genomic signatures of population-specific adaptation, which would also help us predict the evolutionary responses to future climate changes.

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“…North American A. lyrata subsp. lyrata (from now on abbreviated as A. lyrata ) occurs in the eastern United States, from North Carolina to Upstate New York, and in the Midwest, from Missouri to south‐western Ontario (few populations occur westward up to southern Alberta; Willi et al., 2022). Populations are mostly self‐incompatible and mainly pollinated by wild bees and syrphids (Sánchez‐Castro, Armbruster et al., 2022).…”

Section: Methodsmentioning

confidence: 99%

“…The Arabidopsis lyrata occurrence data set was compiled with data from Lee‐Yaw et al., (2018), the GBIF database with occurrence data entries after 1960 (http://gbif.org, September 14, 2022, https://doi.org/10.15468/dl.vv75kt) and various herbaria collections. We excluded occurrence points of northern Alberta and Saskatchewan as they were found to consist of hybrids with Arabidopsis arenicola in a secondary contact zone formed after the divergence of the two species (Willi et al., 2022). We first thinned the occurrences to one per square kilometre to match the resolution of the climate data.…”

Section: Methodsmentioning

confidence: 99%

“…vv75kt) and various herbaria collections. We excluded occurrence points of northern Alberta and Saskatchewan as they were found to consist of hybrids with Arabidopsis arenicola in a secondary contact zone formed after the divergence of the two species (Willi et al, 2022). We first thinned the occurrences to one per square kilometre to match the resolution of the climate data.…”

Section: Occurrencesmentioning

confidence: 99%

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Uncovering the cause of breakup between species' range limits and niche limits under climate warming

Sánchez‐Castro,

Patsiou,

Perrier

et al. 2024

Journal of Biogeography

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AimGlobal climate change has been linked to shifts in species' geographic and elevational distributions, with taxa varying in responsiveness. This variation may be due to a time lag in response or climate alone not being a simple determinant of distribution limits. To tease apart the role of climate in distribution, we compared the temperature response of predicted occurrence revealed by ecological niche modelling (ENM) on historical climate with that of performance in a multi‐population transplant experiment. Congruence would support that climate is a main driver of distribution limits of a species.LocationNorth America.TaxonArabidopsis lyrata subsp. lyrata.MethodsSeeds of 20 populations of North American Arabidopsis lyrata from across the entire range were collected, propagated and then sown along a latitudinal transect across and beyond the species' range. Lifetime performance was related to the main niche‐ and range‐determining climatic variable revealed by ENM.ResultsLifetime performance did not consistently decline towards the high‐latitude range limit, but it did so towards the low‐latitude range limit. This decline was slightly weaker for low‐latitude populations, indicating divergent climate adaptation. The overall performance curve on the field‐measured minimum temperature in early spring was fairly congruent with the curve of ENM‐predicted suitability on this important niche‐determining variable. ENM‐based projections revealed that the southernmost populations were vulnerable under climate warming.Main ConclusionsResults verified that ENM based on species occurrences can well‐predict plant performance under field conditions. Congruence teaches us that with the climate change so far, the species exhibits a colonisation deficit in the north. Furthermore, the southernmost populations are vulnerable to extinction. A likely outcome is the shrinking of the species' range.

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Recent speciation associated with range expansion and a shift to self-fertilization in North American Arabidopsis

Cited by 8 publications

References 64 publications

Breakdown of self-incompatibility due to genetic interaction between a specific S-allele and an unlinked modifier

Breakdown of self-incompatibility due to genetic interaction between a specific S-allele and an unlinked modifier

Population genomics reveals demographic history and climate adaptation in JapaneseArabidopsis halleri

Uncovering the cause of breakup between species' range limits and niche limits under climate warming

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