Characterization of a heat-activated retrotransposon in <i>Vigna angularis</i>

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  • Characterization of a heat-activated retrotransposon in Vigna angularis

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<p>In plants, several transposable elements are conserved across species. We found a homolog of ONSEN, which is a heat-activated retrotransposon originally isolated from Arabidopsis thaliana, in Vigna. The ONSEN-like elements (VaONS) were detected in all the analyzed Japanese accessions of Vigna angularis (adzuki bean) by Southern blot analysis. However, VaONS sequences were observed to be polymorphic in the different accessions. Interestingly, extrachromosomal DNA (ecDNA) was detected in some accessions of adzuki bean, indicating the conserved heat-activation of VaONS. Furthermore, we successfully induced retrotransposition of VaONS in adzuki plant regenerated through callus. Findings of our study should provide a new tool for molecular breeding of adzuki bean.</p>

Journal

  • Breeding Science

    Breeding Science 68 (2), 168-176, 2018

    Japanese Society of Breeding

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