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SCIENCE
345:
1250092,
2014
Klíčová slova:
Abstrakt:
The allohexaploid bread wheat genome consists of three closely related subgenomes
(A, B, and D), but a clear understanding of their phylogenetic history has been lacking.
We used genome assemblies of bread wheat and five diploid relatives to analyze
genome-wide samples of gene trees, as well as to estimate evolutionary relatedness
and divergence times.We show that the A and B genomes diverged from a common
ancestor ~7 million years ago and that these genomes gave rise to the D genome through
homoploid hybrid speciation 1 to 2 million years later. Our findings imply that the
present-day bread wheat genome is a product of multiple rounds of hybrid speciation
(homoploid and polyploid) and lay the foundation for a new framework for understanding
the wheat genome as a multilevel phylogenetic mosaic.
Fulltext: kontaktujte autory z ÚEB
Autoři z ÚEB: Jarmila Číhalíková,
Jaroslav Doležel,
Zdeňka Dubská,
Marie Kubaláková,
Hana Šimková,
Romana Šperková,
Jan Vrána
Čeština
English