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为明确河北和内蒙古马铃薯干腐病菌种类和优势种群,从两省采集300块具干腐病症状的样品,通过分离培养、形态鉴定、TEF-1α序列分析及致病性测定等,对马铃薯干腐病菌种类进行了系统研究。结果表明,两省马铃薯干腐病共存在4种病原菌,即接骨木镰刀菌Fusarium sambucinum、锐顶镰刀菌F.acuminatum、尖孢镰刀菌F.oxysporum和芬芳镰刀菌F.redolens,分别为149、80、3、3株。其中,河北省的优势种群为接骨木镰刀菌和锐顶镰刀菌,其发生频率分别为50%和48.68%;内蒙古的优势种群为接骨木镰刀菌,发生频率为87.95%。
In order to clarify the types and dominant populations of dry rot pathogens in Hebei and Inner Mongolia, 300 samples of dry rot disease were collected from two provinces. The samples of dry rot were collected from the two provinces by isolation and culture, morphological identification, TEF-1α sequence analysis and pathogenicity determination. Systematic research on the pathogen species. The results showed that there were four kinds of pathogenic fungi in the two provinces, namely Fusarium sambucinum, F. acuminatum, F.oxysporum and F. redolens, 149, 80,3,3 strains. Among them, the dominant populations in Hebei Province were Fusarium elm and Fir spinoza, with frequency of 50% and 48.68%, respectively. The dominant species in Inner Mongolia was Fusarium pluvialis, with a frequency of 87.95%.