The genetic basis for low coefficient of infection to stem rust in common wheat

Gene Action and Plant Breeding

“…Dabov studied the inheritance of resistance to Sphaerotheca pannosa Wallr. In Table 9.3, results from Rajaram and Luig (1972) illustrate isoepistasis. in hybrids of peach [Prunus persica (L.) Batsch] derived from the cross 'Parolo' x 'Fergana Yellow.'…”

Changes in Virulence and Population Shifts in Plant Pathogens

“…Relatively few genes for resis tance to P. graminis f. sp. trifici have been found, but the major control of the disease both in Australia and elsewhere, has been by combining these recognized genes (66). We may be tempted to conclude from Leonard's work (48) that the breeding of hosts with broadly based resistance will sta bilize the population, since he says, "The main barrier to the build up of complex races is their inability to compete with simple races."…”