高粱种质资源对黑束病的抗性鉴定与评价

Screening and Evaluation of Sorghum Germplasm for Resistance to Black Bundle Disease

2016-2017年,在人工接种条件下对110份高粱种质资源进行了抗黑束病鉴定与评价研究,拟探明高粱抗病性及不同寄主来源的高粱、玉米黑束病菌致病力差异。110份高粱种质资源中,对高粱来源的黑束病菌(GHS-1)表现免疫(IM)的13份(占11.8%),高抗(HR)的17份(占15.5%),抗病(R)和中抗(MR)的各14份(占25.4%);感病(S)的17份(占15.5%),高感(HS)的35份(占31.8%);对玉米来源的黑束病菌(YHS-1)表现免疫(IM)的21份(占19.1%),高抗(HR)的11份(占10.0%),抗病(R)的15份(占13.6%),中抗(MR)的12份(占10.9%);感病(S)的21份(占19.1%),高感(HS)的30份(占27.3%)。上述结果表明,目前高粱育种中广泛应用的育种种质恢复系中抗黑束病材料较为丰富,且不同寄主来源的高粱和玉米黑束病菌致病力存在差异。

In order to determine the resistance difference of sorghum germplasm and the pathogenicity difference of Sarocladium strictum from sorghum and maize,a total of 110 sorghum germplasm accessions were subjected for evaluation for the resistance to Black Bundle Disease under artificial inoculation conditions from2016 to 2017. With this collection,13 lines(11.8%)were scored as immune(IM),17 lines(15.5%)were highly resistant(HR),14 lines(12.7%)were resistant(R)and 14 lines(12.7%)were moderately resistant(MR),17 lines(15.5%)were susceptible(S),35 lines(31.8%)were highly susceptible(HS)to GHS-1. Twenty-one lines(19.1%)were immune(IM),11 lines(10.0%)were highly resistance(HR),15 lines(13.6%)were resistance(R),12 lines(10.9%)were moderately resistance(MR),21 lines(19.1%)were susceptibility(S)and 30 lines(27.3%)with highly susceptibility(HS)to YHS-1. These results showed that a proportion of restorer lines widely used in sorghum breeding were resistant to Black Bundle Disease,and the pathogenicity of Black Bundle Disease pathogens isolated from sorghum and maize was different.