Plant Systematics and Evolution

, Volume 301, Issue 8, pp 2105–2124 | Cite as

Genotypic diversity of apomictic microspecies of the Taraxacum scanicum group (Taraxacum sect. Erythrosperma)

  • Ľuboš Majeský
  • Radim J. Vašut
  • Miloslav Kitner
Original Article

Abstract

Populations of polyploid apomictic dandelions consist of a mixture of clonal genotypes that are nearly phenotypically and genetically uniform. Some apomictic taxa are widespread, but many other taxa occur locally or at a single locality. Additionally, certain Central European dandelion populations consist of both diploid sexuals and polyploid apomicts, and the gene flow expected in mixed populations obscures clear genetic and morphological borders among apomictic taxa. In the present study, we investigated genotypic diversity among seven apomictic microspecies coexisting in Central Europe. Using microsatellites, amplified fragment length polymorphism and chloroplast DNA markers, we focused on the clonal structure of apomictic taxa, i.e., whether the studied apomictic taxa are represented by one or a few related genotypes or whether they are represented by many different and unrelated genotypes. The pattern of genotypic diversity within the studied microspecies suggests both intra- and inter-specific genetic diversification. At the intra-specific level, the studied apomictic taxa consist of several related genotypes, and difference among these genotypes is the result of somatic mutations and/or the consequence of repeated origin from different lineages or recent hybridisation. The inter-specific genetic diversity is greater and may reflect a different evolutionary origin of apomictic taxa. Our results show that despite their increased genetic diversity, apomictic dandelions form definable clusters that may be characterised by both molecular markers and morphology.

Keywords

AFLP Apomixis Gene flow Genotypic diversity Mutations SSR 

Supplementary material

606_2015_1218_MOESM1_ESM.pdf (663 kb)
Supplementary material 1 (PDF 663 kb)
606_2015_1218_MOESM2_ESM.txt (22 kb)
Supplementary material 2 (TXT 21 kb)

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Copyright information

© Springer-Verlag Wien 2015

Authors and Affiliations

  • Ľuboš Majeský
    • 1
  • Radim J. Vašut
    • 1
  • Miloslav Kitner
    • 1
  1. 1.Department of Botany, Faculty of SciencePalacký University in OlomoucOlomoucCzech Republic

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