Fitness advantage of inter-species TYLCV recombinants induced by beneficial intra-genomic interactions rather than by specific mutations
Tomato yellow leaf curl virus (TYLCV) and its related viruses are prone to recombination. It was reported that random homologous recombination between 20% diverging TYLCV related species is rarely deleterious and may be associated with a fitness advantage. Indeed, TYLCV-IS76, a recombinant between the 20% divergent TYLCV and tomato yellow leaf curl Sardinia virus (TYLCSV), exhibited a higher fitness than that of parental viruses. As this typical fitness advantage was observed with TYLCV-IS76 representatives of different pedigrees, it was thought that it is induced by beneficial intra-genomic interactions rather than by specific mutations. This hypothesis was further supported with TYLCV-IS141, a TYLCV recombinant with a short TYLCSV inherited fragment of around 141 nts, slightly longer than that of TYLCV-IS76. Indeed, the typical fitness advantage was detected irrespective of the position of the recombination breakpoint (loci 76 or 141) and the sequences of the TYLCV and TYLCSV inherited fragments.
| Main Authors: | , , , |
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| Format: | article biblioteca |
| Language: | eng |
| Published: |
Elsevier
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| Subjects: | H20 - Maladies des plantes, géminivirus enroulement jaune tomat, Geminiviridae, recombinaison, évolution, adaptation, résistance aux maladies, http://aims.fao.org/aos/agrovoc/c_32611, http://aims.fao.org/aos/agrovoc/c_32859, http://aims.fao.org/aos/agrovoc/c_6475, http://aims.fao.org/aos/agrovoc/c_2745, http://aims.fao.org/aos/agrovoc/c_117, http://aims.fao.org/aos/agrovoc/c_2328, |
| Online Access: | http://agritrop.cirad.fr/595455/ http://agritrop.cirad.fr/595455/7/595455_MMA.pdf |
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| Summary: | Tomato yellow leaf curl virus (TYLCV) and its related viruses are prone to recombination. It was reported that random homologous recombination between 20% diverging TYLCV related species is rarely deleterious and may be associated with a fitness advantage. Indeed, TYLCV-IS76, a recombinant between the 20% divergent TYLCV and tomato yellow leaf curl Sardinia virus (TYLCSV), exhibited a higher fitness than that of parental viruses. As this typical fitness advantage was observed with TYLCV-IS76 representatives of different pedigrees, it was thought that it is induced by beneficial intra-genomic interactions rather than by specific mutations. This hypothesis was further supported with TYLCV-IS141, a TYLCV recombinant with a short TYLCSV inherited fragment of around 141 nts, slightly longer than that of TYLCV-IS76. Indeed, the typical fitness advantage was detected irrespective of the position of the recombination breakpoint (loci 76 or 141) and the sequences of the TYLCV and TYLCSV inherited fragments. |
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