Identification of a Second Asian Soybean Rust Resistance Gene in Hyuuga Soybean

被引：53

作者：

Kendrick, Mandy D. ^{[1
]}

Harris, Donna K. ^{[2
]}

Ha, Bo-Keun ^{[2
,3
]}

Hyten, David L. ^{[4
]}

Cregan, Perry B. ^{[4
]}

Frederick, Reid D. ^{[1
]}

Boerma, H. Roger ^{[2
]}

Pedley, Kerry F. ^{[1
]}

机构：

[1] USDA ARS, Foreign Dis Weed Sci Res Unit, Ft Detrick, MD 21702 USA

[2] Univ Georgia, Inst Plant Breeding Genet & Genom, Athens, GA 30602 USA

[3] KAERI, ARTI, Jeongeup 580185, Jeonbuk, South Korea

[4] USDA ARS, Soybean Genom & Improvement Lab, Beltsville, MD 20705 USA

来源：

PHYTOPATHOLOGY | 2011年 / 101卷 / 05期

基金：

美国农业部;

关键词：

BULKED SEGREGANT ANALYSIS; PHAKOPSORA-PACHYRHIZI; DISEASE-RESISTANCE; CONFERS RESISTANCE; LOCUS; MAP; RESPONSES; REGIONS; MARKERS; DETECT;

D O I：

10.1094/PHYTO-09-10-0257

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Asian soybean rust (ASR) is an economically significant disease caused by the fungus Phakopsora pachyrhizi. The soybean genes Rpp3 and Rpp?(Hyuuga) confer resistance to specific isolates of the pathogen. Both genes map to chromosome 6 (Gm06) (linkage group [LG] C2). We recently identified 12 additional soybean accessions that harbor ASR resistance mapping to Gm06, within 5 centimorgans of Rpp3 and Rpp?(Hyuuga). To further characterize genotypes with resistance on Gm06, we used a set of eight P pachyrhizi isolates collected from geo-graphically diverse areas to inoculate plants and evaluate them for differential phenotypic responses. Three isolates elicited different responses from soybean accessions PI 462312 (Ankur) (Rpp3) and PI 506764 (Hyuuga) (Rpp?[Hyuuga]). In all, 11 of the new accessions yielded responses identical to either PI 462312 or Hyuuga and 1 of the new accessions. PI 417089B (Kuro daizu), differed from all others. Additional screening of Hyuuga-derived recombinant inbred lines indicated that Hyuuga carries two resistance genes, one at the Rpp3 locus on Gm06 and a second, unlinked ASR resistance gene mapping to Gm03 (LG-N) near Rpp5. These findings reveal a natural case of gene pyramiding for ASR resistance in Hyuuga and underscore the importance of utilizing multiple isolates of P pachyrhizi when screening for ASR resistance.

引用

页码：535 / 543

页数：9

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