Evolution of the Mating System in the Genus Capsella (Brassicaceae)

Paetsch, Melanie; Mayland-Quellhorst, Sara; Hurka, Herbert; Neuffer, Barbara

doi:10.1007/978-3-642-12425-9_5

Cited by 10 publications

(8 citation statements)

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“…This genus is a member of the mustard family and together with the genetic model species Arabidopsis thaliana, it belongs to the tribe of Camelineae (German et al, 2009). Of the two diploid species in this genus, Capsella grandiflora shows a typical sporophytic self-incompatibility as found in other Brassicaceae and reproduces by outbreeding (Paetsch et al, 2006(Paetsch et al, , 2010, whereas the red shepherd's purse (Capsella rubella Reuter) is self-compatible and reproduces predominantly by autogamous selfing (Hurka and Neuffer, 1997). This difference in the reproductive system is linked to a strongly reduced flower size in the selfing C. rubella compared with C. grandiflora, and this contrast is in fact one of the main taxonomic criteria for distinguishing the two species (Hurka and Neuffer, 1997;Foxe et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…C. rubella was derived from C. grandiflora via a severe population bottleneck, with potentially only one self-compatible diploid individual giving rise to the entire present C. rubella lineage (Foxe et al, 2009;Guo et al, 2009), and the divergence time of the two species has been estimated at 20,000 to 50,000 years ago (Foxe et al, 2009;Guo et al, 2009), whereas the Capsella and Arabidopsis lineages are thought to have diverged ;10 to 14 million years ago (Koch and Kiefer, 2005). Whereas C. grandiflora is restricted to the Western Balkans and Northern Italy, the geographical distribution of C. rubella includes most of the Mediterranean climatic regions of the world except South Africa (Paetsch et al, 2010). The dating of the divergence together with the different geographical distributions have led to the suggestion that the evolution of selfing in C. rubella was driven by selection for reproductive assurance in the pollinator-limited conditions during the recolonization of Southern and Central Europe after the last ice age (Foxe et al, 2009;Guo et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Genetics, Evolution, and Adaptive Significance of the Selfing Syndrome in the GenusCapsella

et al. 2011

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The change from outbreeding to selfing is one of the most frequent evolutionary transitions in flowering plants. It is often accompanied by characteristic morphological and functional changes to the flowers (the selfing syndrome), including reduced flower size and opening. Little is known about the developmental and genetic basis of the selfing syndrome, as well as its adaptive significance. Here, we address these issues using the two closely related species Capsella grandiflora (the ancestral outbreeder) and red shepherd's purse (Capsella rubella, the derived selfer). In C. rubella, petal size has been decreased by shortening the period of proliferative growth. Using interspecific recombinant inbred lines, we show that differences in petal size and flower opening between the two species each have a complex genetic basis involving allelic differences at multiple loci. An intraspecific cross within C. rubella suggests that flower size and opening have been decreased in the C. rubella lineage before its extensive geographical spread. Lastly, by generating plants that likely resemble the earliest ancestors of the C. rubella lineage, we provide evidence that evolution of the selfing syndrome was at least partly driven by selection for efficient self-pollination. Thus, our studies pave the way for a molecular dissection of selfingsyndrome evolution.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Genetics, Evolution, and Adaptive Significance of the Selfing Syndrome in the GenusCapsella

et al. 2011

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“…Subsequently, C. rubella extended its range, colonized all Mediterranean countries and spread later with European colonists to North and South America and Australasia (Neuffer & Hurka 1999; Neuffer et al. 1999; Paetsch et al. 2010).…”

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‘Missing link’ species Capsella orientalis and Capsella thracica elucidate evolution of model plant genus Capsella (Brassicaceae)

et al. 2012

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To elucidate the evolutionary history of the genus Capsella, we included the hitherto poorly known species C. orientalis and C. thracica into our studies together with C. grandiflora, C. rubella and C. bursa-pastoris. We sequenced the ITS and four loci of noncoding cpDNA regions (trnL - F, rps16, trnH -psbA and trnQ -rps16). Sequence data were evaluated with parsimony and Bayesian analyses. Divergence time estimates were carried out with the software package BEAST. We also performed isozyme, cytological, morphological and biogeographic studies. Capsella orientalis (self-compatible, SC; 2n = 16) forms a clade (eastern lineage) with C. bursa-pastoris (SC; 2n = 32), which is a sister clade (western lineage) to C. grandiflora (self-incompatible, SI; 2n = 16) and C. rubella (SC; 2n = 16). Capsella bursa-pastoris is an autopolyploid species of multiple origin, whereas the Bulgarian endemic C. thracica (SC; 2n = 32) is allopolyploid and emerged from interspecific hybridization between C. bursa-pastoris and C. grandiflora. The common ancestor of the two lineages was diploid and SI, and its distribution ranged from eastern Europe to central Asia, predominantly confined to steppe-like habitats. Biogeographic dynamics during the Pleistocene caused geographic and genetic subdivisions within the common ancestor giving rise to the two extant lineages.

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“…Capsella grandifl ora and C. rubella. Capsella grandifl ora is diploid and self-incompatible (SI) due to a sporophytic self-incompatibility system (Paetsch et al, 2006(Paetsch et al, , 2010. Although the majority of extant Capsella species are selfcompatible (SC), self-incompatibility should surely be regarded as the ancestral character state (e.g.…”

Section: Molecular Phylogeny Of the Genus Capsellamentioning

confidence: 99%

“…Molecular systematic studies confi rm that the genus Capsella belongs to the tribe, Camelineae (Al-Shehbaz et al, 2006;Bailey et al, 2006;Warwick et al, 2010). Scientifi c research is focusing its attention increasingly on Capsella addressing such key issues as speciation, adaptation, mating systems, and evolutionary developmental biology of plant form Foxe et al, 2009;Guo et al, 2009;Paetsch et al, 2010;Neuffer, 2011;Sicard et al, 2011, Thei#en, 2011. Additionally, sequencing of the Capsella rubella genome is currently being carried out by the Joint Genome Institute, United States Dept.…”

Section: Introductionmentioning

confidence: 99%

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2014

Mong. J. Biol. Sci.

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To elucidate the evolutionary history of the genus Capsella, we included the hitherto poorly known species C. orientalis and C. thracica into our studies together with C. grandifl ora, C. rubella, and C. bursa-pastoris. We sequenced the ITS, and four loci of noncoding cpDNA regions (trnL-F, rps16, trnH-psbA, trnQ-rps16). In common garden fi eld experiments C. orientalis turned out as early fl owering with a specifi c leaf type. The crossing ability of the species was tested in pollen germination experiments. Capsella orientalis (self-compatible, SC; 2n = 16) forms a clade (eastern lineage) with C. bursa-pastoris (SC; 2n = 32), which is a sister clade (western lineage) to C. grandifl ora (self-incompatible, SI; 2n = 16) and C. rubella (SC; 2n = 16). Capsella bursa-pastoris is an autopolyploid species of multiple origin, whereas the Bulgarian endemic C. thracica (SC; 2n = 32) is allopolyploid and emerged from interspecifi c hybridisation between C. bursa-pastoris and C. grandifl ora. The common ancestor of the two lineages was diploid and SI, and its distribution ranged from eastern Europe to central Asia, predominantly confi ned to steppe like habitats. Biogeographic dynamics during the Pleistocene caused geographic and genetic subdivisions within the common ancestor giving rise to the two extant lineages. Capsella orientalis is verifi ed at several positions in western Mongolia.

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Evolution of the Mating System in the Genus Capsella (Brassicaceae)

Cited by 10 publications

References 57 publications

Genetics, Evolution, and Adaptive Significance of the Selfing Syndrome in the GenusCapsella

Genetics, Evolution, and Adaptive Significance of the Selfing Syndrome in the GenusCapsella

‘Missing link’ species Capsella orientalis and Capsella thracica elucidate evolution of model plant genus Capsella (Brassicaceae)

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