为明确云南省玉米茎基腐病的主要病原镰孢菌及分布情况，从9个不同州市采取玉米茎基腐病害样本分离纯化并鉴定其病原。依据形态特征和rDNA-ITS序列分析，云南省玉米茎基腐病的病原包括Fusariumgraminearum（40.74%）、F. verticillioides（37.96%）、F. fujikuroi（3.70%）、F. incarnatum(3.70%)、F. oxysporum(1.85%)、F. proliferatum(1.85%)、F. commune(5.55%)、F. chlamydosporum（2.78%）和F. redolens（1.85%）。其中F. graminearum和F. verticillioides为优势种，前者主要分布于昆明及其以东的地区，后者主要分布于昆明市及其以西的地区，二者在云南的大部分地区均有分布；其余菌株出现频率均低于5.55%,仅分布在1到3个地区。
英文摘要:
Tounderstand the main pathogens of corn stalk rot and their distribution in Yunnan province, the diseased samples were collected from 9 prefectures or cities to isolate and identify the pathogens. Based on the morphology and rDNA-ITS sequence analyses, the pathogens were identified asFusariumgraminearum（40.74%）,F. verticillioides（37.96%）,F. fujikuroi（3.70%）,F. incarnatum(3.70%),F. oxysporum(1.85%),F. proliferatum(1.85%),F. commune(5.55%),F. chlamydosporum（2.78%）and F. redolens（1.85%）. Among the 9 species,F.graminearum andF. verticillioideswere dominant in Yunnan, the former mainly distributed in Kunming and itseast areas, the latter mainly distributedin Kunming and its west areas, indicating the two species distributed in the most areas of Yunnan. But the rest were few with lower than 5.55% of frequency and only distributed in 1-3 prefectures or cities.
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