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关于麦类作物的多系品种和混合品种的研究表明,寄主植物种内的遗传多样化可以明显减轻叶部专性寄生菌引起的病害。在一个专性抗病基因为异源的多系品种中,对病害的控制作用可分为抗病基因的直接作用和品系混合的间接作用。直接作用是组分品系中抗病基因的平均作用,涉及到病菌群体的毒性组成。品系或品种混合种植的防病增产作用是由于①混合品种(系)降低了感病植株的密度;②抗病植株的
Studies on multi-line and mixed lines of wheat crops have shown that genetic diversity within the host plant species can significantly reduce the disease caused by obligate leaf-parasitism. In a multi-lineage-specific disease-resistant gene, the control of the disease can be divided into the direct role of disease-resistant genes and indirect effects of mixed strains. The direct effect is the average effect of the disease-resistant genes in the component strains, which is related to the toxicological composition of the germ population. The anti-disease and anti-proliferation effect of mixed planting of varieties or varieties is due to ① mixed varieties (lines) reduce the density of susceptible plants; ②