Naslov
The evolution of the tetraploid Anemone multifida (2n=32) and hexaploid A. baldensis (2n=48) (Ranunculaceae) was accompanied by similar genomic changes:evidence for their common origin

Autori
Mlinarec, Jelena ; Šatović, Zlatko ; Malenica, Nenad ; Ivančić-Baće, Ivana ; Besendorfer, Višnja

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
International Conference on Polyploidy, Hybridization and Biodiversity / Fehrer, Judith ; Kovarik, Aleš - Průhonice, 2012, P1-21

Skup
International Conference on Polyploidy, Hybridization and Biodiversity

Mjesto i datum
Průhonice, Češka Republika, 07.05.2012. - 10.05.2012

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
35S and 5S rDNA intergenic spacer; Anemone baldensis; Anemone multifida; fluorescence in situ hybridization; genomic in situ hybridization

Sažetak
In the genus Anemone two small groups of taxa occur with the highest ploidy levels 2n = 6x = 48, belonging to the closely related clades: the montane/alpine Baldensis clade and the more temperate Multifida clade. To understand the formation of polyploids within these groups, we analyzed the evolution of allohexaploid A. baldensis (AABBDD, 2n = 6x = 48) from Europe and allotetraploid Anemone multifida (BBDD, 2n = 4x = 32) from America. Both polyploids have undergone genomic changes such as interchromosomal translocation affecting B and D subgenomes and changes at rDNA sites. A. multifida has lost the 35S rDNA loci characteristic of the maternal donor (B subgenome) and maintained only the rDNA loci of the paternal donor (D subgenome). This study shows that A. multifida (BBDD, 2n= 4x = 32) and A. baldensis (AABBDD, 2n = 6x = 48) are allopolyploids originating from the crosses of diploid members of the Multifida (donor of the A and B subgenomes) and Baldensis groups (donor of the D subgenome). This was supported by NTS and ITS sequences analysis and GISH suggesting that all three diploid members of the Multifida group, A. sylvestris, A. cylindrica, and A. virginiana, were involved in their origin. We propose that A. multifida and A. baldensis probably had a common ancestor and their evolution was facilitated by the vegetation changes during the quaternary resulting in their present disjunctive distribution.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

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