Аннотация:An open recombination system would be of immediate and manifest value to plant species experiencing pathogen and pest pressures which are intense, systematic, and capable of redirection in the event the host alters its defensive posture. These pressures are most important in climax communities, well exemplified in the tropics and on ancient islands, where open recombination prevails and is promoted. The simple genetic bases for host resistance and pathogen or pest virulence, the vulnerability of species with restricted recombinations to disease epidemics and pest outbreaks, and the ability of pathogens and pests to rapidly evolve resistance to new natural or synthetic biocides provide the empirical superstructure for postulating why the genomes of K-selected species do not congeal.
