Origin and Evolution of Diploid and Allopolyploid Camelina Genomes Were Accompanied by Chromosome Shattering

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Publikace nespadá pod Filozofickou fakultu, ale pod Středoevropský technologický institut. Oficiální stránka publikace je na webu muni.cz.
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MANDÁKOVÁ Terezie POUCH Milan BROCK J.R. AL-SHEHBAZ I.A. LYSÁK Martin

Rok publikování 2019
Druh Článek v odborném periodiku
Časopis / Zdroj Plant Cell
Fakulta / Pracoviště MU

Středoevropský technologický institut

Citace
www http://www.plantcell.org/content/31/11/2596
Doi http://dx.doi.org/10.1105/tpc.19.00366
Klíčová slova BRASSICACEAE PHYLOGENY; ARABIDOPSIS-THALIANA; RECENT HYBRIDIZATION; FALSE FLAX; SATIVA; CONSEQUENCES; SEQUENCE; CHROMOTHRIPSIS; POLYPLOIDY; PLANTS
Popis Complexes of diploid and polyploid species have formed frequently during the evolution of land plants. In false flax (Camelina sativa), an important hexaploid oilseed crop closely related to Arabidopsis (Arabidopsis thaliana), the putative parental species as well as the origin of other Camelina species remained unknown. By using bacterial artificial chromosome-based chromosome painting, genomic in situ hybridization, and multi-gene phylogenetics, we aimed to elucidate the origin and evolution of the polyploid complex. Genomes of diploid camelinas (Camelina hispida, n = 7; Camelina laxa, n = 6; and Camelina neglecta, n = 6) originated from an ancestral n = 7 genome. The allotetraploid genome of Camelina rumelica (n = 13, (NH)-H-6) arose from hybridization between diploids related to C. neglecta (n = 6, N-6) and C. hispida (n = 7, H), and the N subgenome has undergone a substantial post-polyploid fractionation. The allohexaploid genomes of C. sativa and Camelina microcarpa (n = 20, (NNH)-N-6-H-7) originated through hybridization between an auto-allotetraploid C. neglecta-like genome (n = 13, (NN7)-N-6) and C. hispida (n = 7, H), and the three subgenomes have remained stable overall since the genome merger. Remarkably, the ancestral and diploid Camelina genomes were shaped by complex chromosomal rearrangements, resembling those associated with human disorders and resulting in the origin of genome-specific shattered chromosomes.
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