Founder effect, plant host, and recombination shape the emergent population of begomoviruses that cause the tomato yellow leaf curl disease in the Mediterranean basin.
Tomato yellow leaf curl disease (TYLCD)-associated viruses present a highly structured population in the western Mediterranean basin, depending on host, geographical region and time. About 1,900 tomato and common bean samples were analyzed from which 111 isolates were characterized genetically based on a genome sequence that comprises coding and non-coding regions. Isolates of three distinct begomoviruses previously described were found (Tomato yellow leaf curl virus, TYLCV, Tomato yellow leaf curl Sardinia virus, TYLCSV, and Tomato yellow leaf curl Málaga virus, TYLCMalV), together with a novel recombinant virus. Mixed infections were detected in single plants, rationalizing the occurrence of recombinants. Except for TYLCV-type strain, single, undifferentiated subpopulations were present for each virus type, probably the result of founder effects. Limited genetic variation was observed in genomic regions, with selection against amino acid change in coding regions.
García-Andrés
Susana
S
Estación Experimental "La Mayora", Consejo Superior de Investigaciones Científicas, 29750 Algarrobo-Costa, Málaga, Spain.
Accotto
Gian Paolo
GP
Navas-Castillo
Jesús
J
Moriones
Enrique
E
D053839:Begomovirus / Q000235:genetics* / Q000302:isolation & purification / Q000502:physiology*; D007887:Fabaceae / Q000821:virology*; D018703:Founder Effect; D014644:Genetic Variation; D005838:Genotype; D018551:Solanum lycopersicum / Q000821:virology*; D019083:Mediterranean Region; D008969:Molecular Sequence Data; D010802:Phylogeny; D010935:Plant Diseases / Q000821:virology*; D018515:Plant Leaves / Q000821:virology