临麦系列春小麦品种抗条锈性分析

小麦条锈病是发生于甘肃省临夏州小麦生产上的最主要病害,种植抗病品种是防治该病最经济有效且有利于保护环境的措施。作者于2013年在甘肃省农业科学院植物保护研究所兰州低温温室和甘谷试验站进行了苗期、成株期分小种接种鉴定,并于2010-2014年对临麦系列春小麦品种‘临麦32号’~‘临麦36号’在甘肃省不同生态区的8个试验点进行成株期抗条锈性分析,结果表明:春小麦品种‘临麦32号’苗期对所有供试菌系均表现感病,成株期对CYR29和CYR32表现中抗-中感;‘临麦33号’除对CYR29苗期表现免疫、成株期表现中抗-中感外,对其余供试菌系均表现感病。对自然诱发的条锈病,两品种也表现感病;‘临麦34号’和‘临麦36号’除对新菌系G22-9、G22-14表现感病外,对其余菌系表现抗病,但自2013年开始两品种在田间也表现感病;‘临麦35号’全生育期对接种及自然诱发的条锈菌均表现抗病。苗期选用24个国内外供试条锈菌单孢菌系进行基因推导分析,发现供试临麦系品种抗性谱与已知基因载体品种的抗性谱均不一致,初步推测供试临麦系品种含有未知抗条锈基因。

Resistance analysis on spring wheat cultivar of Linmai lines to stripe rust in Linxia, Gansu Province

Wheat stripe rust (yellow rust),caused by Puccinia striiformis f.sp.tritici (Pst ),is one of the most destructive disease in wheat in Linxia,Gansu Province of China.Growing resistant cultivars is the most economi-cal,environmental friendly,and effective method to control stripe rust of wheat.Five planting spring wheat culti-vars,including ‘Linmai 32’,‘Linmai 33’,‘Linmai 34’,‘Linmai 35’and ‘Linmai 36’,which were important wheat varieties in Linxia region since 2000,were selected to evaluate their resistance to stripe rust at all-stage time by artificially inoculating differential races of Pst in Lanzhou greenhouse of Institute of Plant Protection,Gansu Academy of Agricultural Sciences (IPP-GAAS)at seedling stage,and Gangu Testing Station of IPP-GAAS at adult stage in 2013,and natural induced pool at 8 different location in Gansu Province during 2010-2014.The results showed that the wheat varieties ‘Linmai 32’were susceptible to the tested isolates of Pst at seedling stage,middle resistant-susceptible to CYR29 and CYR32,and susceptible to other isolates of Pst at adult stage.The wheat vari-ety ‘Linmai 33’was immune to CYR29 at seedling stage,middle resistant-susceptible at adult stage,and suscepti-ble to other tested isolates of Pst at all stage,and susceptible to natural isolates at 8 different locations in Gansu Province,China.The wheat varieties ‘Linmai 34’and ‘Linmai 36’were susceptible to G22-9,G22-14,and re-sistant to other isolates.They were also susceptible in field since 2013.The wheat variety ‘Linmai 35’was resist-ant to the testing and natural isolates of Pst in all-stage.Artificial inoculation of 24 single isolates of Pst with dif-ferent spectra of pathogenicity was carried out at seedling stage in Beijing greenhouse (Institute of Plant Protec-tion,Chinese Academy of Agricultural Sciences,IPP-CAAS).The results showed that the resistant spectra of the tested Linmai spring varieties were different from that of the known gene varieties,indicating unknown resistant gene(s)may exist in these spring varieties.