Evaluation and Identification of Oat Germplasm Resistance to Ustilago segetum var.avenae
The study aimed to confirm the difference of oat germplasm resources resistance to Ustilago segetum var.avenae and discuss to form evaluation rule of oat resistance to black covered smut.The resistance of 135 oat cultivars was assessed by seeds mixed with teliospores and seeds covered with soil mixed with teliospores under field conditions from 2013 to 2014.In seeds mixed with teliospores condition,the results showed that 12 cultivars were immune,6 cultivars were highly resistant,1 cultivar was resistant,19 cultivars were moderately susceptible,16 cultivars were susceptible,and 10 cultivars were highly susceptible,which accounted for 18.8％,9.4％,1.6％,29.7％,25.0％,and 15.6％ of 64 naked oat cultivars,respectively;45 cultivars were immune,22 cultivars were highly resistant,2 cultivars were resistant,2 cultivars were moderately susceptible,which accounted for 63.4％,31.0％,2.8％,2.8％ of 71 hulled oat cultivars,respectively.In seeds covered with soil mixed with teliospores condition,17 cultivars were immune,8 cultivars were highly resistant,13 cultivars were resistant,22 cultivars were moderately susceptible,3 cultivars were susceptible,1 cultivar was highly susceptible,which showed 26.6％,12.5％,20.3％,34.4％,4.7％,1.6％ share of 64 naked oat cultivars,respectively;56 cultivars were immune,13 cultivars were highly resistant,1 cultivar was resistant,1 cultivar was moderately susceptible,which showed 78.9％,18.3％,1.4％,1.4％ of 71 hulled oat cultivars,respectively.It also showed that the resistances of 62 cultivars were consistent in two inoculation methods,10 cultivars were higher in seed cov ered with soil mixed with teliospores than in seed mixed with teliospores.Incidence of 63 cultivars was significantly increased and resistance was reduced in seed covered with soil mixed with teliospores.The result illustrated that the way of seeds mixed with teliospores was better than seeds covered with soil mixed with teliospores.Obtaining these effective resistance germplasm could provide core resistance source for breeding and cultivars of reasonable layout or replacement.
NETL
NSTL
万方数据
维普
