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由大麦黄矮病毒(BYDV)感染引起的小麦黄矮病(WYD)能使小麦产量减少20%～30%,是小麦的主要病害之一.控制发病的因素集中于三点,即病毒、传播源和寄主.目前认为比较有效的方法是创造抗病的品种.虽然小麦中有些种质被报道具有BYDV耐性,但真正具有BYDV良好抗性的品种仍未发现.相反,小麦的一些近缘属如中间偃麦草(Thinopyrum inter-medium,TI)具有BYDV抗性的报道很多,而且目前通过远缘杂交的方法已将中间偃麦草的抗BYDV的基因转移到小麦.然而用常规的田间方法检测中间偃麦草的BYDV抗性基因是
Wheat yellow dwarf virus (WYD) caused by the infection of BYDV can reduce the yield of wheat by 20% -30%, which is one of the major diseases of wheat. The factors that control the incidence are concentrated on three points: virus, spread Source and host.At present it is considered more effective to create disease-resistant varieties.Although some germplasms in wheat are reported to have BYDV tolerance, no species with true BYDV resistance has been found.On the contrary, some relatives For example, Thinopyrum inter-medium (TI) is reported to have many BYDV resistances and at present, BYDV genes of Thinopyrum intermedium have been transferred to wheat by distant crossover method. However, The BYDV resistance gene of Thinopyrum is