00938naa a2200157 a 450000100080000000500110000800800410001910000180006024501020007826000090018052003650018965000170055465300240057165300290059577301560062418263992013-02-27       1970    bl ---       0--  u    #d1 aWATSON, I. A.  aThe utilization of wild species in the breeding of cultivated crops resistant to plant pathogens.  c1970  aIntroduction; The biological balance between host and pathogen; Geographical centres of diversity; Wild species as sources of resistance; Wild species in relation to crop hygiene and pathogen variability; Transfer of resistance from wild species; How genes for resistance become ineffective; Stability of disease resistance; Cataloguing of genes for virulence.  aMelhoramento  aEspécies selvagens  aResistência às doencas  tIn: FRANKEL, O. H.; BENNET, E. (Ed.). Genetic resources on plants: their exploration and conservation. Oxford: Blackweel Scientific Publications, 1970.