| intersubspecific recombination in xylella fastidiosa strains native to the united states: infection of novel hosts associated with an unsuccessful invasion. | the bacterial pathogen xylella fastidiosa infects xylem and causes disease in many plant species in the americas. different subspecies of this bacterium and different genotypes within subspecies infect different plant hosts, but the genetics of host adaptation are unknown. here we examined the hypothesis that the introduction of novel genetic variation via intersubspecific homologous recombination (ihr) facilitates host shifts. we investigated ihr in 33 x. fastidiosa subsp. multiplex isolates pr ... | 2014 | 24296499 |