水稻穗部农艺性状与稻曲病抗性的相关性分析  

Analysis on relationship between rice agronomic features around the panicles and false smut resistance

作　　者：陈天琪 李衫衫 吕楚阳 梁五生[1] 胡东维[1] CHEN Tian-qi;LI Shan-shan;LU Chu-yang;LIANG Wu-sheng;HU Dong-wei(State Key Laboratory of Rice Biology,Biotechnology Institute of Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学生物技术研究所,水稻生物学国家重点实验室,杭州310058

出　　处：《植物病理学报》2020年第2期211-217,共7页Acta Phytopathologica Sinica

基　　金：国家重点研发计划(2016YFD0300706);国家自然科学基金资助项目(31671969);浙江大学新农村发展研究院农业技术推广专项资金资助(2017ZDNT014)。

摘　　要：人工接种试验和田间多年自然发病调查发现,目前生产上应用的水稻品种均感稻曲病;但在自然条件下,不同水稻品种稻曲病的发生程度存在较大差异,可以人为的分为多病粒高感品种和寡病粒相对抗病的品种。为了探究水稻穗部性状与其病害抗性间的关系,本文对孕穗期不同阶段的不同水稻品种的穗部性状进行了比较分析。结果发现表型为多病粒的高感多病粒品种与表型为寡病粒的相对抗病的品种之间在穗子大小、小花密度、穗鞘闭合程度和密封性、旗叶面积等方面均存在明显差异,寡病粒相对抗病的水稻品种穗鞘闭合程度优于高感多病粒品种。Based on the artificial inoculation tests and the investigations in natural conditions for many years, it is found that the most rice varieties used in China were susceptible to rice false smut pathogen, Villosiclava virens. However, the disease severity in different rice varieties is quite different in paddy fields in natural conditions. Based on the number of rice false smut balls in a panicle, rice varieties can be divided artificially into the high susceptible with multiple smut balls and the relatively resistant varieties with few smut balls. To evaluate the relationship between the features in rice panicles at rice booting stage and the disease resistance, the panicle features in various rice varieties were measured and compared here. The results showed that there were significant differences in panicle size, floret density, panicle sheath closure and sealing, flag leaf area between high susceptible varieties with multiple balls and those with relatively resistant phenotype with few balls.The closure of panicle sheath in the resistant varieties was better than that in the susceptible ones.

关 键 词：水稻品种 穗部性状 稻曲病 抗病性 

分 类 号：S432.44[农业科学—植物病理学] S435.111[农业科学—农业昆虫与害虫防治]