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Chromosome painting in cultivated bananas and their wild relatives (Musa spp.) reveals differences in chromosome structure

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    0535188 - ÚEB 2021 RIV CH eng J - Journal Article
    Šimoníková, Denisa - Nĕmečková, Alžbĕta - Čížková, Jana - Brown, A. - Swennen, R. - Doležel, Jaroslav - Hřibová, Eva
    Chromosome painting in cultivated bananas and their wild relatives (Musa spp.) reveals differences in chromosome structure.
    International Journal of Molecular Sciences. Roč. 21, č. 21 (2020), s. 1-17, č. článku 7915. E-ISSN 1422-0067
    R&D Projects: GA ČR(CZ) GA19-20303S; GA MŠk(CZ) LTT19009; GA MŠk(CZ) EF16_019/0000827
    Institutional support: RVO:61389030
    Keywords : Chromosome translocation * Fluorescence in situ hybridization * Karyotype evolution * Oligo painting FISH * Structural chromosome heterozygosity
    OECD category: Agronomy, plant breeding and plant protection
    Impact factor: 5.924, year: 2020
    Method of publishing: Open access
    http://doi.org/10.3390/ijms21217915

    Edible banana cultivars are diploid, triploid, or tetraploid hybrids, which originated by natural cross hybridization between subspecies of diploid Musa acuminata, or between M. acuminata and diploid Musa balbisiana. The participation of two other wild diploid species Musa schizocarpa and Musa textilis was also indicated by molecular studies. The fusion of gametes with structurally different chromosome sets may give rise to progenies with structural chromosome heterozygosity and reduced fertility due to aberrant chromosome pairing and unbalanced chromosome segregation. Only a few translocations have been classified on the genomic level so far, and a comprehensive molecular cytogenetic characterization of cultivars and species of the family Musaceae is still lacking. Fluorescence in situ hybridization (FISH) with chromosome-arm-specific oligo painting probes was used for comparative karyotype analysis in a set of wild Musa species and edible banana clones. The results revealed large differences in chromosome structure, discriminating individual accessions. These results permitted the identification of putative progenitors of cultivated clones and clarified the genomic constitution and evolution of aneuploid banana clones, which seem to be common among the polyploid banana accessions. New insights into the chromosome organization and structural chromosome changes will be a valuable asset in breeding programs, particularly in the selection of appropriate parents for cross hybridization.
    Permanent Link: http://hdl.handle.net/11104/0313275

     
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