Towards the elimination of infectious endogenous Banana streak virus sequences from Musa balbisiana

Umber Marie, Farinas Benoît, Bonheur Lydiane, Jenny Christophe, Teycheney Pierre-Yves. 2011. Towards the elimination of infectious endogenous Banana streak virus sequences from Musa balbisiana. In : 15th International Congress of Virology, 11-16 September 2011, Sapporo, Japon : International Union of Microbiological Societies 2011 Congress (IUMS 2011), 6-16 September, Sapporo, Japon. s.l. : s.n., Résumé, 1 p. International Congress of Virology. 15, Sapporo, Japon, 11 Septembre 2011/16 Septembre 2011.

Résumé : Infectious endogenous sequences of several Banana streak virus species are present in the genome of Musa balbisiana spp, which are important progenitors for breeding improved banana varieties. Once activated by biotic or abiotic stresses, these sequences can cause infection in natural and synthetic interspecific hybrids harbouring the M. balbisiana genome. Therefore, infectious endogenous BSV (eBSV) sequences are currently the main constraints for breeding much needed banana and plantain interspecific hybrids and for exchanging Musa germplasm. The full genomic and genetic organization of eBSV sequences present in diploid M. balbisiana cultivar Pisang Klutuk Wulung (PKW) was recently elucidated, showing that endogenous BSGFV, BSOLV and BSImV sequences in PKW result from a single integration event. This work also showed that integration of eBSGFV and eBSOLV is di-allelic with only one infectious allele whereas that of infectious eBSImV is monoallelic. We have undertaken the characterization of eBSOLV, eBSGFV and eBSImV in the M. balbisiana accessions of CIRAD Guadeloupe's germplasm collection. This work unveiled important differences between accessions, which were shown to harbor all combinations of infectious and non infectious alleles for one or several distinct BSV species. These results were confirmed biologically, by following the kinetics of expression of infectious eBSV sequences in various genotypes during cell culture, which is the most potent abiotic stress activating the expression of infectious eBSV sequences. Breeding improved M. balbisiana progenitors devoid of infectious eBSGfV and/or BSOLV sequences was achieved in several selfed and/or double haploid lines by segregating the corresponding infectious and non infectious alleles. This work paves the way to the elimination of infectious eBSV sequences from M. balbisiana progenitors, and to the safe use of M. balbisiana genitors for creating interspecific banana and plantain hybrids. (Texte intégral)

Mots-clés Agrovoc : Musa balbisiana, virus des végétaux

Mots-clés géographiques Agrovoc : Guadeloupe, France

Mots-clés complémentaires : Banana streak virus

Classification Agris : H20 - Maladies des plantes

Auteurs et affiliations

• Umber Marie, INRA (GLP)
• Farinas Benoît, CIRAD-BIOS-UMR AGAP (GLP)
• Bonheur Lydiane, CIRAD-BIOS-UMR AGAP (FRA)
• Jenny Christophe, CIRAD-BIOS-UMR AGAP (GLP)
• Teycheney Pierre-Yves, CIRAD-BIOS-UMR AGAP (GLP) ORCID: 0000-0002-9754-0745

Source : Cirad - Agritrop (https://agritrop.cirad.fr/561237/)

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