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Resistance of barley varieties to Heterodera avenae in the Qinghai–Tibet Plateau,China

Journal of Integrative Agriculture 2022年第5期21卷 1401-1413页

作者： YAN Jia-hui JIA Jian-ping JIANG Li-ling PENG De-liang LIU Shi-ming HOU Sheng-ying YU Jing-wen LI Hui-xia HUANG Wen-kun Key Laboratory of Agricultural Integrated Pest Management Qinghai Academy of Agriculture and Forestry SciencesXining 810016P.R.China State Key Laboratory for Biology of Plant Diseases and Insect Pests/Institute of Plant Protection Chinese Academy of Agricultural SciencesBeijing 100193P.R.China College of Plant Protection Gansu Agricultural UniversityBiocontrol Engineering Laboratory of Crop Diseases and Pests of Gansu ProvinceLanzhou 730070P.R.China

The cereal cyst nematode,Heterodera avenae,is one of the most economically important pathogens impacting the worldwide production of cereals and is widely distributed in more than 16 regions in China.The present study used the numbers of nematodes inside the plant roots to evaluate the resistance/susceptibility of different subpopulations of barley Hordeum vulgare(QH2R,QH6R and TB2R)to H.avenae under field and pot conditions.Nematode development in two highly resistant varieties was also evaluated by in vivo experiment and microscopic observation.Analyses of 186selected varieties showed the numbers of susceptible varieties identified with the number of females/cysts per plant(NFP)method were significantly higher than those identified with the Pf/Pi ratio(PPR)method,which indicated that the NFP method rather than the PPR method is more reliable to evaluate the resistance of barley.The field and pot experiment results indicated that the QH2R subpopulation had lower females/cysts numbers than QH6R and TB2R subpopulations,and eight HR varieties(Sunong 7617,Sunong 7635,Dongyuan 87-14,Rudong 14-46,Rudong 87-57,Rudong 87-8-45,Rudong 88-14-2,and Rudong 88-67-1)were identified in QH2R,with the NFP numbers below 4.2.Further microscopic observation of nematode development suggested that H.avenae often penetrated less into highly resistant varieties(Sunong 7635 and Dongyuan 87-14)and more frequently failed to develop into females than the susceptible barleys.The promising resistant varieties identified in the present research might be helpful for breeders to develop CCN-resistant cultivars and control H.avenae populations effectively at low costs.

关键词： Heterodera avenae barley varieties resistance evaluation number of females/cysts per plant(NFP)

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