青海省106份小麦种质的茎基腐病抗性评价OA

Wheat crown rot,caused by Fusarium pseudograminearum,is one of the potential diseases limiting high and stable wheat yield.To clarify the resistance level of wheat varieties in Qinghai Prov-ince to crown rot caused by F.pseudograminearum,two highly pathogenic strains,1802570(Fp70)and 1800592(Fp92),were selected to artificially inoculate 106 wheat germplasms from Qinghai.Re-sistance identification was conducted at both the seedling and adult plant stages.The disease index of each material was calculated,and the resistance level was analyzed.The results showed that none of the tested materials were immune or highly resistant to the two strains at either growth stage.At the seedling stage,five germplasms(4.72％)exhibited moderate resistance to Fp70,and three germ-plasms(2.83％)showed moderate resistance to Fp92.At the adult plant stage,seven germplasms displayed moderate individual resistance to Fp70 and Fp92.Among them,Mobo 1 showed moderate resistance to both strains at the adult plant stage,while Xinmaifan 4 exhibited moderate resistance to Fp70 at both the seedling and adult plant stages.Under infection by the two strains separately,a sig-nificant correlation between disease indices was observed only at the adult plant stage among the test-ed wheat germplasms.In conclusion,wheat germplasms in Qinghai Province generally exhibit low re-sistance to crown rot caused by F.pseudograminearum.The identified resistant germplasms may provide references for wheat resistance breeding in Qinghai Province.