How can natural hybridisation between self‐compatible and self‐incompatible species be bidirectional?

Li, Chengjun; Cousens, Roger; Mesgaran, Mohsen B.

doi:10.1111/wre.12372

Cited by 7 publications

(18 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This pattern of biased backcrossing towards C. maritima was predicted based on field observations of pollinator visitations (Mesgaran et al, 2016), the morphological replacement of C. edentula by C. maritima , and previous genetic studies (Mesgaran et al, 2016; Ohadi et al, 2016). It is also consistent with expected mating asymmetries between these species and their hybrids caused by the inheritance of the self‐incompatibility system and traits associated with pollinator attraction in hybrids (Li et al, 2019). In artificial crosses, early generation hybrids inherited mostly (but not exclusively) self‐incompatibility, as well as larger floral displays, similar to C. maritima (Li et al, 2019).…”

Section: Discussionsupporting

confidence: 86%

The tip of the iceberg: Genome wide marker analysis reveals hidden hybridization during invasion

et al. 2021

Self Cite

View full text Add to dashboard Cite

Biological invasions are accelerating, and invasive species can have large economic impacts as well as severe consequences for biodiversity. During invasions, species can interact, potentially resulting in hybridization. Here, we examined two Cakile species, C. edentula and C. maritima (Brassicaceae), that co‐occur and may hybridize during range expansion in separate regions of the globe. Cakile edentula invaded each location first, while C. maritima established later, apparently replacing the former. We assessed the evidence for hybridization in western North America and Australia, where both species have been introduced, and identified source populations with 4561 SNPs using Genotype‐by‐Sequencing. Our results indicate that C. edentula in Australia originated from one region of eastern North America while in western North America it is probably from multiple sources. Cakile maritima in Australia is derived from at least two different parts of Europe while the introduction in western North America is from one. Although morphological evidence of hybridization is generally limited to mixed species populations in Australia and virtually absent elsewhere, our genetic analysis revealed relatively high levels of hybridization in Australia (58% hybrids using Admixture) and supported the presence of hybrids in western North America (16% hybrids using Admixture) and New Zealand. Hybrids might be commonly overlooked in invaders, as identification based solely on morphological traits may represent only the tip of the iceberg. Our study reveals a repeated pattern of invasion, hybridization and apparent replacement of one species by another, which offers an opportunity to investigate the role of hybridization and introgression during invasion.

show abstract

Section: Discussionsupporting

confidence: 86%

The tip of the iceberg: Genome wide marker analysis reveals hidden hybridization during invasion

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Cakile edentula populations ahead of the sympatric zone should be pure representatives; in the sympatric zone, C. edentula plants also display the high level of self-compatibility (Ohadi, 2015;Li et al, 2020a) similar to individuals in their native and other invaded ranges (Rodman, 1974;Donohue, 1998;Willis et al, 2014). Populations of C. maritima from behind the sympatric zone are the likely source of propagules into regions containing C. edentula, with primarily obligate self-incompatibility (Li et al, 2019) again similar to studies in other regions (Rodman, 1974;Willis et al, 2014). If a species is actively moving through the domain of another species, hybridizing and backcrossing as it goes, we expect the presence of introgression between the two Cakile species (Li et al, 2020a).…”

Section: Seed Sources and Planting Proceduresmentioning

confidence: 99%

“…and C. edentula (Bigelow) Hook., two Brassicaceae species with contrasting breeding systems, have successively invaded Australian coastlines and have been shown to hybridize both naturally in the wild (Ohadi et al, 2015) and artificially in glasshouses (Li et al, 2019). Each species, especially C. maritima , shows variations in many phenotypic characteristics such as leaf shape and flower size (Cousens et al, 2013; Li et al, 2019). Consequently, because the phenotypes overlap, natural hybrids may be indistinguishable from their parental species but can be identified as true hybrids if found to have a mixture of parental genes (Ohadi et al, 2015).…”

mentioning

confidence: 99%

Asymmetry in fitness‐related traits of later‐generation hybrids between two invasive species

Ohadi

Mesgaran

2020

American J of Botany

Self Cite

View full text Add to dashboard Cite

Hybridization has increasingly become recognized as playing a pivotal role in biological invasions (Hall et al., 2006; Schierenbeck and Ellstrand, 2009; Hovick and Whitney, 2014). When hybridization occurs, a wide range of phenotypic characters can arise, depending on the genetic architecture of the resultant offspring (Abbott et al., 2013). Hybrids may exhibit intermediate traits in comparison to their parents or show transgressive segregation, whereby a fraction of hybrid individuals exceed parental phenotypic values in either a negative or a positive direction (

show abstract

“…Cakile edentulais self-compatible and sets seed autonomously at a high rate (Barbour, 1970;Rodman, 1974). Anthers of C. edentula dehisce before the flowers open indicating opportunities for prior selfing (Li et al, 2019). Both species are diploid (2n = 18) (Rodman, 1974).…”

Section: Study Speciesmentioning

confidence: 99%

“…In each case, there has been complete replacement of C. edentula by C. maritima over wide geographic areas (Barbour & Rodman, 1970;Cousens et al, 2013;Rodman, 1986), which was originally assumed to involve either direct or indirect competition. However, these species are closely related and cross-compatible (Rodman, 1974;Li, Cousens, & Mesgaran, 2019. The high level of morphological variation in Australia compared to western Canada led the authors of one study (Cody & Cody, 2004) to propose the involvement of hybridization and introgression, though the mechanism of the replacement remains unclear (Barbour & Rodman, 1970;Rodman, 1986;Cousens et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

The tip of the iceberg: genome wide marker analysis reveals hidden hybridization during invasion

Rosinger

Geraldes

Nurkowski

et al. 2020

Preprint

View full text Add to dashboard Cite

Biological invasions are accelerating, and invasive species can have large economic impacts as well as severe negative consequences for biodiversity and ecosystems. During invasions, species can interact, potentially resulting in hybridization. Here, we examined two Cakile species, C. edentula and C. maritima (Brassicaceae), that co-occur and may hybridize during range expansion in separate regions of the globe. Cakile edentula invaded each location first, while C. maritima established later, apparently replacing the former. We assessed the evidence for hybridization in western North America and Australia, where both species have been introduced, and identified source populations with 4561 SNPs using Genotype-by-Sequencing. Our results indicate that the C. edentula in Australia originated from one region of eastern North America while in western North America it is likely from multiple sources. The C. maritima in Australia were derived from at least two different parts of Europe while the introduction in western North America is from a distinct source. Although morphological evidence of hybridization is generally limited to mixed populations in Australia and virtually absent elsewhere, our genetic analysis revealed relatively high levels of hybridization in Australia (34.13%), and supported the presence of hybrids in western North America (16.18%) and New Zealand. Hybrids might be commonly overlooked in invaders, as identification based solely on morphological traits may represent only the tip of the iceberg. Our study reveals a repeated pattern of invasion, hybridization and apparent replacement of one species by another, which offers an opportunity to investigate the role of hybridization and introgression during invasion.

show abstract

How can natural hybridisation between self‐compatible and self‐incompatible species be bidirectional?

Abstract: This is the author manuscript accepted for publication and has undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record.

Cited by 7 publications

References 39 publications

The tip of the iceberg: Genome wide marker analysis reveals hidden hybridization during invasion

The tip of the iceberg: Genome wide marker analysis reveals hidden hybridization during invasion

Asymmetry in fitness‐related traits of later‐generation hybrids between two invasive species

The tip of the iceberg: genome wide marker analysis reveals hidden hybridization during invasion

Contact Info

Product

Resources

About