摘要
由大麦黄矮病毒(barley yellow dwarf virus,BYDV)导致的燕麦(Avena sativa)红叶病,是我国燕麦产区的主要病害之一。为明确不同燕麦种质材料对蚜虫和大麦黄矮病毒的抗性水平,本研究于2015-2017年,用模糊识别法和目测法调查了33份燕麦资源在灌浆期自然感染蚜虫和BYDV的情况。通过计算蚜量比值和病害平均严重度,对其进行了抗蚜性和抗病性评价。结果表明,铃铛麦、青永久420、青永久119、白燕1号、农大360、MN10253、宁莜1号和重穗莜麦8份材料在3年间均对蚜虫表现抗性,占供试材料的24.24%。而Jim、MN11213和花晚6号3年间均一致表现感蚜,占供试材料的9.09%;参试材料中有10份均对BYDV表现抗性,包括铃铛麦、堵吉、农大360、青永久119、青永久260、青永久420、科燕1号、青永久31、宁莜1号和青永久9,占供试材料的30.3%。而定莜4号和Jim在3年间均一致表现感病,占供试材料的6.06%。33份供试材料中在3年间既抗蚜虫又抗BYDV的有铃铛麦、青永久119、青永久420、农大360和宁莜1号5份,是优异的病虫兼抗燕麦种质;Jim既感蚜又感BYDV。田间蚜量比值与BYDV病害严重度呈显著正相关关系(P<0.05)。白燕15号作为离群材料,易被BYDV感染。本研究对燕麦种质资源抗蚜性和BYDV抗性进行了分析,筛选出了抗性较强的燕麦种质,对燕麦的抗病虫育种工作具有极其重要的指导意义。
Barley yellow dwarf virus(BYDV)is one of the main oat diseases in China.The present study aimed to confirm the resistance of different oat cultivars to aphids and barley yellow dwarf virus.Using fuzzy synthetic assessment and through observations under field conditions,the resistance of 33 oat germplasm resources against naturally inoculated viruliferous aphids and BYDV was evaluated in 2015-2017.The number of aphids and disease severity at the filling stage were investigated,the ratio of rating scale infested by aphid and average severity were calculated,and resistance to aphids and BYDV was examined.The results showed that eight oat cultivars,including Lingdang oat,Qingyongjiu 420,Qingyongjiu 119,Baiyan No.1,Nongda 360,MN10253,Ningyou No.1,and Zhongsui,showed resistance to aphids over the three years,accounting for 24.24%of the tested cultivars.Jim 1,Huawan No.6,and MN11213 cultivars were consistently sensitive to aphids over the three years,accounting for 9.09%of the tested cultivars.Ten of the tested oat cultivars were resistant to BYDV,including Lingdang,Duji,Nongda 360,Qingyongjiu 119,Qingyongjiu 260,Qingyongjiu 420,Keyan No.1,Qingyongjiu 355,Ningyou No.1,and Qingyongjiu 9,accounting for 30.3%of the tested cultivars.Dingyou NO.4 and Jim 1 were consistently sensitive to BYDV over the three years,accounting for 6.06%of the tested cultivars.Lingdang oat,Qingyongjiu 119,Qingyongjiu 420,Nongda 360,and Ningyou No.1 were the optimal germplasm resources,as they were the most resistant to aphids and BYDV among the 33 test resources during the three-year period.Jim 1 was the only sensitive variety to both aphids and BYDV over the three years.The ratio of aphid numbers was significantly positively correlated with the severity of BYDV disease.Baiyan No.15 was an outlier cultivar and was easily infected by BYDV.In this study,the resistance of oat germplasm resources to aphids and BYDV was studied,and the resistant oat germplasms were identified.This has extremely important guiding significance for the selective breeding of oats against pests and diseases.
作者
王军
赵桂琴
柴继宽
郭建国
焦润安
WANG Jun;ZHAO Guiqin;CHAI Jikuan;GUO Jianguo;JIAO Run’an(College of Pratacultural Science,Gansu Agricultural University/Key Laboratory of Grassland Ecology System,Ministry of Education,Sino-U.S.Centers for Grazing Land Ecosystem Sustainability,Lanzhou 730070,Gansu,China;Institute of Plant Protection,Gansu Academy of Agricultural Sciences,Lanzhou 730070,Gansu,China)
出处
《草业科学》
CAS
CSCD
2019年第12期3155-3165,共11页
Pratacultural Science
基金
行业专项子课题(03025)
国家燕麦荞麦产业体系(CARS-7-C)
关键词
燕麦
抗蚜性
抗BYDV性
评价
oat
resistance to aphids
resistance to BYDV
evaluation
