Selective influence of wheat cultivars on pathogenicity of Mycosphaerella graminicola (Anamorph Septoria tritici)
Selective influence of wheat cultivars on pathogenicity of Mycosphaerella graminicola (Anamorph Septoria tritici)
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DOI：
10.1094/phyto-86-454
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发表时间：
1996-05-01
期刊：
影响因子：
3.2
通讯作者：
Coakley, SM
中科院分区：
文献类型：
--
作者：
Ahmed, HU;Mundt, CC;Coakley, SM
从临近作物成熟的冬小麦品种中分离出的禾本科真菌菌群随后在温室内同一小麦品种的幼苗上进行了鉴定。证明了显著的病原体群体效应、品种效应和病原体群体与品种的相互作用。从敏感品种中分离出的病原体群体比从中等抗性或抗性品种中分离出的群体产生更高水平的疾病，这表明敏感品种在田间选择了更高水平的病原体侵袭性。此外，病原菌群体对田间分离的品种的毒力比对其他品种的毒力更强，表明存在品种特异性毒力的选择。
Populations of Mycosphaerella graminicola isolated from winter wheat cultivars near crop maturity were subsequently evaluated on seedlings of the same wheat cultivars in the greenhouse. Significant pathogen population effects, cultivar effects, and pathogen population x cultivar interactions were demonstrated. Pathogen populations isolated from susceptible cultivars produced higher levels of disease, averaged over cultivars, than did populations isolated from moderately resistant or resistant cultivars, indicating that susceptible cultivars selected for higher levels of pathogen aggressiveness in the field. In addition, pathogen populations were more virulent on the cultivars they were isolated from in the field than on other cultivars, indicating selection for cultivar-specific virulence.