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The Methodology of multi resistance to diseases in wheat distant breeding

ZHANG Qing qin (Tritical Crop Center of Guizhou University,Guiyang 550025 China)  
Distant crossing is the main method for breeding wheat cultivar with multi resistance to diseases and is the key to make use of new distant germplasm resources.The complementarity of characters between wild resistant resources and high yielding parents must be considered before selection of parents.It is important that the population of segregation hybrid progenies should be as large as possible.In the first circle of selection,all resistant single plants of F 2 or F 3 should be selected.The population of each resistant type should be extended as large as possible in succesive generation. The second circle of selection is aimed at combining disease-resistance with high yielding property simultaneously.The selection should be continued until the selected types are genetically stable.Disease condition in selective nursery is another key to multi resistant breeding.
【Fund】: 国家自然科学重点基金
【CateGory Index】: S512.103.4
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