Powdery Mildew Resistance in Wheat Cultivar Mv Hombár is Conferred by a New Gene, PmHo.
A new powdery mildew resistance gene designated as PmHo was identified in 'Mv Hombár' winter wheat, bred in Martonvásár, Hungary. It has exhibited a high level of resistance over the last two decades. Genetic mapping of recombinant inbred lines derived from the cross 'Ukrainka'/Mv Hombár located this gene on chromosome 2AL. The segregation ratio and consistent effect in all environments indicated that PmHo is a major dominant powdery mildew resistance gene. The race-specific nature of resistance in Mv Hombár was shown by the emergence of a single virulent pathotype designated as 51-Ho. This pathotype was, to some extent, able to infect Mv Hombár, developing visible symptoms with sporulating colonies. Microscopic studies revealed that, in incompatible interactions, posthaustorial hypersensitivity reaction was the most prevalent but not exclusive plant defense response in Mv Hombár, and fungal growth was mostly arrested during haustorium formation or in the early stages of colony development. The delayed fungal development of the virulent pathotype 51-Ho may be explained by additional effects of other loci that were also involved in the powdery mildew resistance of Mv Hombár.
First, third, fourth, eighth, ninth, and tenth authors: Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences (MTA), Brunszvik 2, H-2462 Martonvásár Hungary; second author: Plant Protection Institute, Centre for Agricultural Research, MTA, P.O. Box 102, H-1525 Budapest; fifth, sixth, and seventh authors: National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Zhongguancun South Street 12, Beijing 100081.
Judit
J
Komáromi
First, third, fourth, eighth, ninth, and tenth authors: Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences (MTA), Brunszvik 2, H-2462 Martonvásár Hungary; second author: Plant Protection Institute, Centre for Agricultural Research, MTA, P.O. Box 102, H-1525 Budapest; fifth, sixth, and seventh authors: National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Zhongguancun South Street 12, Beijing 100081.
Tünde
T
Jankovics
First, third, fourth, eighth, ninth, and tenth authors: Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences (MTA), Brunszvik 2, H-2462 Martonvásár Hungary; second author: Plant Protection Institute, Centre for Agricultural Research, MTA, P.O. Box 102, H-1525 Budapest; fifth, sixth, and seventh authors: National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Zhongguancun South Street 12, Beijing 100081.
Attila
A
Fábián
First, third, fourth, eighth, ninth, and tenth authors: Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences (MTA), Brunszvik 2, H-2462 Martonvásár Hungary; second author: Plant Protection Institute, Centre for Agricultural Research, MTA, P.O. Box 102, H-1525 Budapest; fifth, sixth, and seventh authors: National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Zhongguancun South Street 12, Beijing 100081.
Katalin
K
Puskás
First, third, fourth, eighth, ninth, and tenth authors: Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences (MTA), Brunszvik 2, H-2462 Martonvásár Hungary; second author: Plant Protection Institute, Centre for Agricultural Research, MTA, P.O. Box 102, H-1525 Budapest; fifth, sixth, and seventh authors: National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Zhongguancun South Street 12, Beijing 100081.
Zengyan
Z
Zhang
First, third, fourth, eighth, ninth, and tenth authors: Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences (MTA), Brunszvik 2, H-2462 Martonvásár Hungary; second author: Plant Protection Institute, Centre for Agricultural Research, MTA, P.O. Box 102, H-1525 Budapest; fifth, sixth, and seventh authors: National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Zhongguancun South Street 12, Beijing 100081.
Miao
M
Zhang
First, third, fourth, eighth, ninth, and tenth authors: Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences (MTA), Brunszvik 2, H-2462 Martonvásár Hungary; second author: Plant Protection Institute, Centre for Agricultural Research, MTA, P.O. Box 102, H-1525 Budapest; fifth, sixth, and seventh authors: National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Zhongguancun South Street 12, Beijing 100081.
Hongjie
H
Li
First, third, fourth, eighth, ninth, and tenth authors: Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences (MTA), Brunszvik 2, H-2462 Martonvásár Hungary; second author: Plant Protection Institute, Centre for Agricultural Research, MTA, P.O. Box 102, H-1525 Budapest; fifth, sixth, and seventh authors: National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Zhongguancun South Street 12, Beijing 100081.
Katalin
K
Jäger
First, third, fourth, eighth, ninth, and tenth authors: Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences (MTA), Brunszvik 2, H-2462 Martonvásár Hungary; second author: Plant Protection Institute, Centre for Agricultural Research, MTA, P.O. Box 102, H-1525 Budapest; fifth, sixth, and seventh authors: National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Zhongguancun South Street 12, Beijing 100081.
László
L
Láng
First, third, fourth, eighth, ninth, and tenth authors: Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences (MTA), Brunszvik 2, H-2462 Martonvásár Hungary; second author: Plant Protection Institute, Centre for Agricultural Research, MTA, P.O. Box 102, H-1525 Budapest; fifth, sixth, and seventh authors: National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Zhongguancun South Street 12, Beijing 100081.
Gyula
G
Vida
D001203:Ascomycota / Q000502:physiology*; D001947:Breeding; D002874:Chromosome Mapping; D018744:DNA, Plant / Q000235:genetics; D060467:Disease Resistance / Q000235:genetics; D008040:Genetic Linkage; D054884:Host-Pathogen Interactions; D018895:Microsatellite Repeats / Q000235:genetics; D010641:Phenotype; D010935:Plant Diseases / Q000276:immunology* / Q000382:microbiology; D010940:Plant Proteins / Q000235:genetics* / Q000378:metabolism; D040641:Quantitative Trait Loci / Q000235:genetics; D014908:Triticum / Q000235:genetics* / Q000276:immunology / Q000382:microbiology
D018744:DNA, Plant; D010940:Plant Proteins