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The Progress of Disease in Relation to Resistance
Chapter 4 Vertical Resistance in the Host and Stabilizing
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able to attack aggressiveness attack the genotype average breeders breeding Capella chapter component lines crop curves delay differential interaction discussed epidemic estimated evidence example factors for virulence field resistance fungus gene Rx gene Sr6 genes for resistance genes for vertical genotype half-life half-life of race horizontal resistance host genotype host plants host varieties increase infection rate initial inoculum inoculated isolates Kennebec Kirste's latent period lesions Little Club logarithmic phase maize Maritta match multiline needed oats obligate parasites overcome the resistance pathogen Phytoalexins Phytophthora infestans polygenic polysora potato blight potato varieties Puccinia graminis pustules race 56 races able relative half-life relative to race resistance given resistance to blight resistant varieties rust fungus saprophytic Schick Section sistance spores sporing zone stabilizing selection strong genes susceptible varieties Table tissue tomato unnecessary factors unnecessary virulence vertical resistance Vertifolia effect virulent races weak genes wheat stem rust wheat varieties winter wheat