海南普通野生稻稻瘟病抗性资源调查和鉴定

为挖掘海南普通野生稻稻瘟病抗性资源，2010年诱发鉴定了41个居群410份材料苗期叶瘟，2011年接种稻瘟病菌（YC25）鉴定了37个居群121份材料穗颈瘟，2012年调查了80个居群2461份材料田间自然状态的抗病性。结果表明：苗期叶瘟抗性鉴定有21份高抗、117份抗病。苗期抗、高抗叶瘟性的138份材料中穗颈瘟鉴定4份高抗和3份抗病，14份表现为田间自然抗病。苗期叶瘟鉴定不抗病或未作此鉴定材料中，4份表现为抗穗颈瘟和田间自然抗病。这些抗性材料来自海口、文昌、万宁、三亚、澄迈、东方等地。本研究为海南普通野生稻资源进一步研究和抗稻瘟病育种利用提供参考

Investigation and Identification of Resistance to Rice Blast in Oryza rufipogon Griff. Indigenous to Hainan

To excavate blast-resistant germplasms of Oryza rufipogon Griff. indigenous to Hainan , 410 accessions from 41 natural populations were identified for the resistance to leaf blast at the seedling stage, by naturally infected with the pathogen in 2010. In 2011, 121 accessions of 37 natural populations were identified for the resistance to neck blast at the heading stage by artificial spray inoculation with blast isolates (YC25). In 2012, 2461 accessions of 80 natural populations were investigated under field conditions for the resistance to leaf blast. The results showed that 22 and 117 accessions were highly resisitant (HR) and resisitant (R) to leaf blast at the seedling stage, respectively. Among the 138 accessions, 4 and 3 were respectively HR and R to neck blast, and 14 showed resistance under field conditions. In addition, 4 accessions which were susceptible or unidentified at the seedling stage, showed resistance both to neck blast and to leaf blast under field conditions. These resistant accessions come from Haikou, Wenchang, Wanning, Sanya, Chengmai, and Dongfang. The findings may provide reference for further study and utilization of Oryza rufipogon Griff.