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小麦生育前期,生理小种的组成较简单,主要是一些致病力的小种,田间只是一些感病品种发病.在生育的中后期,致病力较强的小种逐渐出现,数量由少到多,田间生理小种的组成也相应复杂化,较抗病的品种亦开始发病.有性世代用闭囊壳鉴定出的生理小种种类组成和比例与田间无性世代鉴定结果类似.其中致病力弱的小种占优势.闭囊壳在感病的品种上形成最多.
In the early stage of wheat growth, the composition of physiological races is relatively simple, mainly some of the pathogenicity of the race, the field is only a few susceptible varieties in the late reproductive, stronger pathogenic small species gradually emerged, the number of less As a result, the composition of physiological races in the field was also more complicated than that of the resistant ones, and the species composition and proportion of the races identified in the sexual generation were similar to the identification results of the clonal races in the field. Weak diseased races predominate, and the closed shell forms the most on susceptible varieties.