Hybridization and polyploidization within the Chenopodium album aggregate analysed by means of cytological and molecular markers

0495039 - BÚ 2019 RIV US eng J - Journal Article
Mandák, Bohumil - Krak, Karol - Vít, Petr - Lomonosova, M. N. - Belyayev, Alexander - Habibi, F. - Wang, L. - Douda, J. - Štorchová, Helena
Hybridization and polyploidization within the Chenopodium album aggregate analysed by means of cytological and molecular markers.
Molecular Phylogenetics and Evolution. Roč. 129, DEC 2018 (2018), s. 189-201. ISSN 1055-7903. E-ISSN 1095-9513
R&D Projects: GA ČR GA13-02290S
Institutional support: RVO:67985939 ; RVO:61389030
Keywords : allopolyploidy * Chenopodium * phylogeny
OECD category: Plant sciences, botany; Plant sciences, botany (UEB-Q)
Impact factor: 3.992, year: 2018

Hybridization and polyploidization represent an important speciation mechanism in the diploid-polyploid complex of the Chenopodium album aggregate. In this study we successfully reconstructed the evolutionary histories of the majority of Eurasian representatives of the C. album aggregate, resulting in the most comprehensive phylogenetic analysis of this taxonomically intricate group of species to date. We unravelled a surprisingly simple scheme of polyploid species formation within the C. album aggregate. We determined seven groups of polyploid species differing in their origin in either Eurasia or Africa and convincingly demonstrated that (1) all Chenopodium polyploid species under study are of allopolyploid origin, (2) there are eight major monophyletic evolutionary lineages represented by extant or extinct/unknown diploid taxa, (3) those monophyletic lineages represent individual subgenomes, (4) hybridization among the lineages created seven subgenomic combinations of polyploid taxa, (5) taxa represented by particular subgenome combinations were further subjected to diversification, and (6) the majority of species are relatively young, not exceeding the age of the Quaternary period.
Permanent Link: http://hdl.handle.net/11104/0289926