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1. Development of Monogenic and Digenic Rice Lines for Blast Resistance Genes Pi-ta, Pi-kh/Pi-ks

Description:
Includes references
Author:
Jia, Yulin , Moldenhauer, Karen
Subject:
Oryza sativa , rice , grain crops , Magnaporthe grisea , plant pathogenic fungi , blast disease , disease resistance , genetic resistance , breeding lines , genetic markers , genetic polymorphism , microsatellite repeats , gene segregation , alleles , inbred lines , plant genetic resources , germplasm releases , pathogenicity , strain differences , epistasis , grain yield , marker-assisted selection , Arkansas
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
2010

2. Evolution of an avirulence gene, AVR1-CO39, concomitant with the evolution and differentiation of Magnaporthe oryzae

Description:
Includes references
Author:
Tosa, Y. , Osue, J. , Eto, Y. , Oh, H.S. , Nakayashiki, H. , Mayama, S. , Leong, S.A.
Subject:
Magnaporthe grisea , plant pathogenic fungi , fungal proteins , complementary DNA , sequence analysis , loci , pathogenicity , host-pathogen relationships , blast disease , Oryza sativa , rice , host plants , Triticum aestivum , wheat , Setaria italica , millets , evolution , nucleotide sequences
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
2005

3. Instability of the Magnaporthe oryzae avirulence gene AVR-Pita alters virulence

Description:
The avirulence gene AVR-Pita of Magnaporthe oryzae determines the efficacy of the resistance gene Pi-ta in rice. The structures of the AVR-Pita alleles in 39 US isolates of M. oryzae were analyzed using polymerase chain reaction. A series of allele-specific primers were developed from the AVR-Pita gene to examine the presence of AVR-Pita. Orthologous alleles of the AVR-Pita gene were amplified from avirulent isolates. Sequence analysis of five alleles revealed three introns at identical positions in the AVR-Pita gene. All five alleles were predicted to encode metalloprotease proteins highly similar to the AVR-Pita protein. In contrast, the same regions of the AVR-Pita alleles were not amplified in the most virulent isolates, and significant variations of DNA sequence at the AVR-Pita allele were verified by Southern blot analysis. A Pot3 transposon was identified in the DNA region encoding the putative protease motif of the AVR-Pita protein from a field isolate B2 collected from a Pi-ta-containing cultivar Banks. These findings show that transposons can contribute to instability of AVR-Pita and is one molecular mechanism for defeating resistance genes in rice cultivar Banks.
Author:
Zhou, E.X. , Jia, Y.L. , Singh, P. , Correll, J.C. , Lee, F.N.
Subject:
Magnaporthe , plant pathogenic fungi , genes , virulence , alleles , introns , DNA primers , polymerase chain reaction , nucleotide sequences , transposons , pathogenicity , blast disease , Oryza sativa , rice
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
2007

4. Mapping Quantitative Trait Loci Responsible for Resistance to Sheath Blight in Rice

Description:
Includes references
Author:
Liu, G. , Jia, Y. , Correa-Victoria, F.J. , Prado, G.A. , Yeater, K.M. , McClung, A. , Correll, J.C.
Subject:
Oryza sativa , rice , fungal diseases of plants , Thanatephorus cucumeris , plant pathogenic fungi , pathogenicity , signs and symptoms (plants) , disease resistance , plant breeding , genetic markers , marker-assisted selection , chromosome mapping , genes , quantitative trait loci , genetic recombination , inbred lines , progeny testing , cultivars , genetic variation , microsatellite repeats , phenotypic variation , haplotypes , soil-borne diseases , soil fungi
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
2009

5. Natural variation at the Pi-ta rice blast resistance locus

Description:
Includes references
Author:
Jia, Y. , Bryan, G.T. , Farrall, L. , Valent, B.
Subject:
Oryza sativa , rice , Magnaporthe grisea , plant pathogenic fungi , pathogenicity , disease resistance , plant breeding , genetic resistance , genes , genetic variation , alleles , loci , cultivars , amino acid sequences
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
2003

6. Pathogenicity and in planta mycotoxin accumulation among members of the Fusarium graminearum species complex on wheat and rice

Description:
Includes references
Author:
Goswami, R.S. , Kistler, H.C.
Subject:
Triticum aestivum , wheat , Oryza sativa , rice , fungal diseases of plants , Gibberella zeae , Fusarium , plant pathogenic fungi , pathogenicity , seeds , mycotoxins , biosynthesis , quantitative analysis , pathotypes , genetic variation
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
2005

7. Rice Pi-ta gene confers resistance to the major pathotypes of the rice blast fungus in the United States

Description:
Includes references
Author:
Jia, Y. , Wang, Z. , Fjellstrom, R.G. , Moldenhauer, K.A.K. , Azam, M.A. , Correll, J. , Lee, F.N. , Xia, Y. , Rutger, J.N.
Subject:
Oryza sativa , rice , Magnaporthe grisea , plant pathogenic fungi , blast disease , pathogenicity , pathotypes , disease resistance , genes , cultivars , genetic variation , genetic markers , alleles , chromosome mapping
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
2004