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PMID: 22288429 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't

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

Molecular ecology ·Vol. 21 ·No. 5 ·2012-03-00 ·Pages 1223-38

Hurka H, Friesen N, German DA, Franzke A, Neuffer B

Abstract

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.

MeSH Terms

Bayes Theorem Biological Evolution Capsella/classification,genetics DNA, Chloroplast/genetics DNA, Plant/genetics DNA, Ribosomal Spacer/genetics Diploidy Hybridization, Genetic Isoenzymes/genetics Molecular Sequence Data Phylogeny Sequence Analysis, DNA

Chemicals

DNA, Chloroplast DNA, Plant DNA, Ribosomal Spacer Isoenzymes

Authors & Affiliations

5 authors, click to expand affiliations / ORCID

Hurka Herbert

Department of Botany, University of Osnabrück, Barbarastrasse 11, Osnabrück, Germany.

Friesen Nikolai

German Dmitry A

Franzke Andreas

Neuffer Barbara

Article Info

Journal

Molecular ecology

Abbr.

Mol Ecol

ISSN

1365-294X

DOI

10.1111/j.1365-294X.2012.05460.x

Published

2012-03-00

Epub

2012-00-31

Pages

1223-38

Language

English

Region

England

NLM ID

9214478

Subset

Databases

GENBANK

FR773701, FR773702, FR773703, FR773704, FR773705, FR773706, FR773707, FR773708, FR773709, FR773710, FR773711, FR822322, FR822323, FR822324, FR822325, FR822326, FR822327, FR822328, FR822329, FR822330, FR822331, FR822332, FR822333, FR822334, FR822335, FR822336, FR822337, FR822338, FR822339, FR822340, FR822341, FR822342, FR822343, FR822344, FR822345, FR822346, FR822347, FR822348, FR822349, FR822350, FR822351, FR822352, FR822353, FR822354, FR822355, FR822356, FR822357, FR822358, FR822359, FR822360, FR822361, FR822362, FR822363, FR822364, FR822365, HE575225, HE575226, HE575227, HE575228, HE575229, HE575230, HE575231, HE575232, HE575233, HE575234, HE575235, HE575236, HE575237, HE575238, HE575239, HE575240, HE575241, HE575242, HE575243, HE575244

External Links

PubMed source DOI: 10.1111/j.1365-294X.2012.05460.x View journal details

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

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