玉米主要品种对粗缩病的田间抗性评价

玉米粗缩病是安徽省玉米产区重要病害,选育和应用抗病品种是唯一经济高效的防治措施。于2009年,对安徽省33个玉米品种进行粗缩病田间鉴定。根据相对抗病指数,将品种分为高抗(HR,0～0.20)、抗病(R,0.21～0.39)、中抗(MR,0.40～0.59)、感病(S,0.60～0.79)、高感(HS,0.80～1.00)5类。鉴定结果表明:高感粗缩病的品种有13个(病指在52.1～100),分别是鲁宁202、雅玉12、弘大8号、滑玉13、苏玉20、郑单23、浚单18、中科11、益丰29、郑单958、申源213、蠡玉13和济单8号;感粗缩病的品种有8个(病指在41.0～52.0),分别是隆平206、浚单20、先玉335、金赛29、鲁单661、中农大236、鲁单981和金赛6850;中抗粗缩病的品种有5个(病指在31～40),分别是齐单1号、中农大311、利民15、皖玉17和东单80;抗粗缩病的品种有5个(病指在14.1～30.0),分别是中科4号、宿单9号、蠡玉35、鲁单6018和蠡玉16;高抗粗缩病的品种有2个(病指在0～14.0)分别是登海3号和农大108。

Evaluation of resistance to maize rough drawf disease virus

Maize rough dwarf virus(MSDV) is one of the most important diseases in corn production in An-hui province.Breeding and application of disease-resistant cultivars is the most effective and economical way to control the disease.In this paper,33 maize cultivars in the field of Anhui province in 2009 were identified,and a criterion for evaluating the disease resistance was established based on the relative disease-resistant index,in which relative disease-resistant indices ranging from 0 to 0.20 stand for highly resistance,0.21-0.39 for resistance,0.40-0.59 for moderate resistance,0.60-0.79 for susceptibility,and above 0.8 for high susceptibility.As a result,13 cultivars are identified as highly susceptible to MSDV,which are Luning 202,Yayu12,Hongda 8,Huayu 13,Suyu 20,Zhengdan 23,Jundan 23,Jundan 13,Zhongke 11,Yifeng 29,Zhengdan 958,Shenyuan 213,Liyu 13 and Jidan 8;8 cultivars are identified as susceptible to MSDV,which are Longping 206,Jundan 20,Xianyu 335,Jinsai 29,Ludan 661,Zhongnongda 236,Ludan 981 and Jinsai 6850;5 cultivars are identified as moderate resistance to MSDV,which are Qidan 1,Zhongnongda 311,Limin 15,Wanyu 17 and Dongdan 80;5 cultivars are identified as resistance to MSDV,which are Zhongke 4,Sudan 9,Liyu 35,Ludan 6018 and Liyu 16;Denghai 3 and Nongda 108 are identified as highly resistance to MSDV.