Burdon J J
Division of Plant Industry, CSIRO, G.P.O. Box 1600, 2601, Canberra City, A.C.T., Australia.
Oecologia. 1987 Sep;73(2):257-267. doi: 10.1007/BF00377516.
Phenotypic patterns of resistance to nine races of the pathogen Phakopsora pachyrhizi (soybean rust) in two natural populations of Glycine canescens were determined. In both populations there was considerable variability both within and between different host lines in their resistance or susceptibility to the nine different pathogen races. The genetic basis of these patterns of resistance was analyzed through an extensive series of crosses. In both host populations resistance was conditioned by single dominant genes with major phenotypic effects. One, two or three such genes were present in each host line. Using the principles of the gene-for-gene hypothesis, knowledge about the number of resistance genes present in each host line and by cross comparison of the phenotypic patterns of disease resistance detected in each line, estimates were made of the number of resistance genes or alleles present in each population of G. canescens. The two populations contained a minimum of 10 and 12 resistance genes. The relevance of these results to agriculture is discussed briefly.
测定了灰毛大豆两个自然种群对病原菌大豆锈菌九个生理小种的抗性表型模式。在这两个种群中，不同寄主系在对九个不同病原菌生理小种的抗性或易感性方面，种群内部和种群之间都存在相当大的变异性。通过一系列广泛的杂交分析了这些抗性模式的遗传基础。在两个寄主种群中，抗性均由具有主要表型效应的单个显性基因决定。每个寄主系中存在一个、两个或三个这样的基因。利用基因对基因假说的原理，通过了解每个寄主系中存在的抗性基因数量，并交叉比较每个系中检测到的抗病表型模式，估计了每个灰毛大豆种群中存在的抗性基因或等位基因数量。这两个种群至少含有10个和12个抗性基因。简要讨论了这些结果与农业的相关性。
