Phytopathology. 2006 May;96(5):480-4. doi: 10.1094/PHYTO-96-0480.
ABSTRACT A Triticum isolate (pathogenic on wheat) of Magnaporthe oryzae was crossed with an Oryza isolate (pathogenic on rice) to elucidate mechanisms of their parasitic specificity on wheat. When the pathogenicity of their F (1) cultures (hybrids between a Triticum isolate and an Oryza isolate) was tested on wheat, avirulent and virulent cultures segregated in a 7:1 ratio. This result suggests that three loci are involved in avirulence of the Oryza isolate on wheat. One of the three loci conditioned papilla formation, whereas the others conditioned the hypersensitive reaction. Allelism tests revealed that the locus conditioning papilla formation is Pwt2 while one of the two loci conditioning the hypersensitive reaction is Pwt1. The other locus conditioning the hypersensitive reaction was different from any other known loci and, therefore, was designated as Pwt5.
摘要 本研究将稻瘟病菌（对水稻致病）的一个小麦分离株与一个水稻分离株进行杂交，以阐明其在小麦上寄生特异性的机制。当在小麦上测试它们的 F1（小麦分离株和水稻分离株之间的杂种）培养物的致病性时，无毒和有毒培养物以 7:1 的比例分离。这一结果表明，三个基因座参与了稻瘟病菌在小麦上的无毒。三个基因座中的一个控制着乳突的形成，而其他两个控制着过敏性反应。等位基因测试表明，控制乳突形成的基因座是 Pwt2，而控制过敏性反应的两个基因座中的一个是 Pwt1。控制过敏性反应的另一个基因座与任何其他已知基因座不同，因此被指定为 Pwt5。
