Specialization of pathogenicity in Magnaporthe grisea

从巴西地区的小麦中收集的稻瘟病菌分离物接种在各种禾本科植物上，以确定其寄主范围。通过植物反应和产孢潜力分析了属于9族的42种禾本科植物。来自小麦的菌株感染五个族的禾本科植物：大麦族、羊茅族、燕麦族、Chlorideae族和Agrosteac族，但不感染日本鉴别稻或巴西低地和高地品种。通过小麦和谷子两种交配型的杂交，分析了小麦和谷子的交配型。16个小麦分离物中有14个属于MAT 1 -1型，1个属于MAT 1 -2型。通过将小麦品系与其他禾本科植物品系杂交来确定育性。当小麦品系与来自Eleusin coracana、Brachiaria plantagarium、Setaria italica的品系以及不同的小麦分离物杂交时，产生成熟的子囊孢子。虽然水稻菌株能够感染小麦幼苗和穗实验，主要的小麦菌株被认为是不同于水稻菌株和牛筋草菌株相似。

Isolates Pyricularia grisea collected from wheat in regions of Brazil were inoculated on various gramincous plants to determine their host range. A set of 42 defferent gramincous plants belonging to nine tribes was analyzed by plant reactions and sporulation potential. The strain from wheat infected gramineous plants of five tribes : Hordeae, Festuccae, Avencae, Chlorideae, and Agrosteac, but not Japanese differential or Brazilian lowland and upland rice cultivars. Mating types were analyzed by crossing wheat and finger millet strains belonging to two mating types. Fourteen wheat isolates out of 16 were classified as MAT1-1, and one was MAT1-2. Fertility was determined by crossing the wheat strain with strains of other gramineous plants. Mature ascospores were produced when the wheat strain crossed with strains from Eleusin coracana, Brachiaria plantaginea, Setaria italica, and different wheat isolates. Although a rice strain was able to infect wheat seedlings and panicles experimentally, the main wheat strain was suggested to be different from the rice strain and similar to the Eleusine strain.