A new resistance gene to powdery mildew identified in Solanum neorossii has been localized on the short arm of potato chromosome 6

被引：4

作者：

Park, Tae-Ho ^{[1
]}

Jones, Jonathan D. G. ^{[1
]}

机构：

[1] John Innes Inst, Sainsbury Lab, Norwich NR4 7UH, Norfolk, England

来源：

EUPHYTICA | 2009年 / 166卷 / 03期

关键词：

Golovinomyces orontii; Potato; Powdery mildew resistance; Resistance gene homologue; Solanum neorossii; LATE BLIGHT RESISTANCE; DISEASE-RESISTANCE; OIDIUM-LYCOPERSICON; PHYTOPHTHORA-INFESTANS; CONFERRING RESISTANCE; NUCLEOTIDE-BINDING; 6; HOMOLOGS; OL-GENES; TOMATO; LOCUS;

D O I：

10.1007/s10681-008-9811-5

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

A new resistance (R) gene to powdery mildew has been identified and characterized in a population derived from the wild potato species, Solanum neorossii under natural infection in the greenhouse. The segregation of resistance has revealed that this R gene is controlled by a single monogenic and dominant gene designated Rpm-nrs1. Analysis of the DNA sequence on an internal transcribed spacer (ITS) region of the pathogen genome suggests that the pathogen causing the powdery mildew disease is either Golovinomyces orontii or G. cichoracearum. The resistance locus was localized to the short arm of chromosome 6 where several disease R genes already identified in potato and tomato are known to reside. The resistance locus cosegregated in 96 progeny with three AFLP markers and one PCR marker. The sequences of the two cosegregating AFLP markers are highly homologous to Mi-1 conferring resistance to nematode, potato aphid and whitefly and Rpi-blb2 conferring resistance to late blight. The results in this study will facilitate the cloning of this gene conferring resistance to powdery mildew.

引用

页码：331 / 339

页数：9

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