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Abstract Detail

Hybrids and Hybridization

Mandak, Bohumil [1], Travnicek, Pavel [2], Krak, Karol [1], Vit, Petr [1], Lei, Wang [3], Brcakova, Adela [4].

Is hybridization involved in the evolution of the Chenopodium album aggregate?

For our study of the Chenopodium album aggregate, we selected species that represent the diploid-polyploid complex in Central Europe and especially focused on (a) the origin of polyploid species and (b) the frequency of hybridization between species with different ploidy levels. We have not found any direct evidence of the existence of hybrids between two species with different ploidy levels within the C. album group. The sample/standard ratio of tetraploid and hexaploid species does not equal multiples of diploid species, which suggests that (i) tetraploids are not diploid autopolyploids and that (ii) hexaploids have not evolved from diploid species alone. Moreover, we have not found any hybrid plant in the field or even in the offspring resulting from our experimental crosses. In view of these results, we adhere to the opinion that Chenopodium species do not hybridize freely across ploidy levels. However, our analysis of DNA amounts suggests that C. album is an allopolyploid that has arisen by hybridization between a diploid and a tetraploid species.

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1 - Institute of Botany, Academy of Sciences of the Czech Republic, Genetic Ecology, Zamek 1, Pruhonice, 25243, Czech Republic
2 - Institute of Botany, Academy of Sciences of the Czech Republic, Flow Cytometry, Zamek 1, Pruhonice, 25243, Czech Republic
3 - Xinjiang Institute of Ecology and Geography, Chinese Academy of Scienc, State Key Laboratory of Desert and Oasis Ecology, 713 Lab building, 818 South Beijing Road, Urumqi, Xinjiang, 830011, China
4 - Faculty of Environmental Sciences, Czech University of Life Sciences P, Ecology, Kamýcká 129, Prague, 16521, Czech Republic

flow cytometry
unreduced gametes.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Eyrie/Boise Centre
Date: Monday, July 28th, 2014
Time: 5:30 PM
Number: PHB002
Abstract ID:554
Candidate for Awards:None

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