Phytopathology. 1999 Dec;89(12):1214-7. doi: 10.1094/PHYTO.1999.89.12.1214.
ABSTRACT Infection types produced by Puccinia graminis f. sp. avenae on plants of Avena sativa with the stem rust resistance gene Pg10 are characterized by moderate-sized uredinia surrounded by an area of chlorosis and a larger variable zone of dark brown necrosis. This study was undertaken to assess the effectiveness of gene Pg10 as a source of resistance to stem rust and to determine the interactions of this gene with other common Pg genes. A derived Pg10 line was tested with 58 distinct pathotypes of P. graminis f. sp. avenae and was crossed to substituted single-gene lines carrying the resistance gene Pg1, Pg2, Pg3, Pg4, Pg8, Pg9, Pg13, Pg15, Pg16, or Pga. The Pg10 line showed moderate resistance to all 58 patho-types, and there was no indication of specificity in virulence by any isolate. Gene Pg10 was inherited independently of the other Pg genes and had a complementary effect on the expression of resistance by these genes. An effective level of resistance conferred by Pg10 was demonstrated in a field nursery artificially inoculated with P. graminis f. sp. avenae. It was concluded that Pg10 is a potentially useful source of stem rust resistance in oat breeding, with its main attributes being an apparent broad base of resistance, ease of combining with other Pg genes, and complementary effects on the expression of other Pg genes.
在携带抗秆锈基因 Pg10 的燕麦植株上，由禾柄锈菌引起的侵染类型表现为中等大小的夏孢子堆，周围环绕着一片褪绿区和一个较大的、颜色较深的棕色坏死区。本研究旨在评估基因 Pg10 作为抗秆锈病的来源的有效性，并确定该基因与其他常见 Pg 基因的相互作用。一个衍生的 Pg10 系与 58 种不同的禾柄锈菌生理小种进行了测试，并与携带 Pg1、Pg2、Pg3、Pg4、Pg8、Pg9、Pg13、Pg15、Pg16 或 Pga 基因的替代单基因系进行了杂交。Pg10 系对所有 58 种生理小种表现出中等抗性，没有任何分离物表现出毒性特异性。基因 Pg10 与其他 Pg 基因独立遗传，对这些基因表达抗性具有互补作用。在人工接种禾柄锈菌生理小种的田间苗圃中，证明了 Pg10 赋予了有效的抗性水平。研究结论认为，Pg10 是燕麦抗秆锈育种中一种潜在的有用来源，其主要特性是具有明显的广谱抗性、易于与其他 Pg 基因结合以及对其他 Pg 基因表达的互补作用。
