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小麦白粉病菌(Erysiphe graminis DC.f.sp.tritici em.Marchal)贵白64号生理小种对百泉565、肯贵阿1号、盘江4号及白免3号等4个小麦品种幼苗均能侵入、定殖及繁殖,且潜育速率基本相同,但对百泉565的侵入速率及产孢率相对较高,故寄生适应度较高;对肯贵阿1号侵入速率虽较高,但产孢率较低,故寄生适应度次之;对盘江4号及白免3号的侵入速率及产孢率都较低,故寄生适应度相对较低。与百泉565相比,肯贵阿1号、盘江4号及白免3号苗期对小麦白粉病菌贵白64号生理小种都具降低流行速率的因素。其中,肯贵阿1号对64号小种具降低产孢率的抗性因素,而盘江4号及白免3号则具降低侵入速率及产孢率的抗性因素。
Wheat germplasm (Erysiphe graminis DC.f.spiticiticum.Marchal) Li Bai 64 physiological races on the Baiquan 565, Kennedy A 1, Panjiang 4 and Baizhong 3 4 wheat seedlings All of them can invade, colonize and multiply, and their growth rates are basically the same. However, the invasion rate and sporulation rate of Baiquan 565 are relatively high, so the parasitic fitness is higher. Although the invasion rate of Kehui A 1 is higher , But the sporulation rate is lower, so the parasitic fitness is second, and the invasion rate and sporulation rate of Panjiang No.4 and No.3 are relatively low, so the parasitic fitness is relatively low. Compared with Baiquan 565, the factors that reduce the prevalence rate of powdery mildew of Baiyigong No.44 were observed at the seedling stage of Kegua No.1, Panjiang No.4 and Baijiao No.3. Among them, Kennametal A 64 on the 4th species to reduce the sporulation rate resistance factor, and Panjiang No. 4 and Baizhixue 3 have reduced the rate of invasion and sporulation resistance.