Residual effects of the Xa-4 resistance gene in three rice cultivars when exposed to a virulent isolate of Xanthomonas campestris pv. oryzae

Euphytica ◽  
1991 ◽  
Vol 55 (2) ◽  
pp. 187-193 ◽  
Author(s):  
M. Koch ◽  
J. E. Parlevliet
Keyword(s):  
Resistance Gene ◽  
Xanthomonas Campestris ◽  
Residual Effects ◽  
Rice Cultivars ◽  
Virulent Isolate

Residual Effects of MSMA on Sterility in Rice Cultivars 1

1980 ◽  
Vol 72 (6) ◽  
pp. 1066-1067 ◽  
Author(s):  
J. T. Gilmour ◽  
B. R. Wells
Keyword(s):  
Residual Effects ◽  
Rice Cultivars

scholarly journals Identification of an Avirulence Gene in the Fungus Magnaporthe grisea Corresponding to a Resistance Gene at the Pik Locus

2005 ◽  
Vol 95 (7) ◽  
pp. 768-772 ◽  
Author(s):  
N. Yasuda ◽  
M. T. Noguchi ◽  
Y. Fujita
Keyword(s):  
Resistance Gene ◽  
Genetic Basis ◽  
Magnaporthe Grisea ◽  
Fragment Length Polymorphism ◽  
Random Amplified Polymorphic Dna ◽  
Genetic Maps ◽  
Avirulence Gene ◽  
Chinese Isolate ◽  
Rice Cultivars ◽  
Almost All

A rice isolate of Magnaporthe grisea collected from China was avirulent on rice cvs. Hattan 3 and 13 other Japanese rice cultivars. The rice cv. Hattan 3 is susceptible to almost all Japanese blast fungus isolates from rice. The genetic basis of avirulence in the Chinese isolate on Japanese rice cultivars was studied using a cross between the Chinese isolate and a laboratory isolate. The segregation of avirulence or virulence was studied in 185 progeny from the cross, and monogenic control was demonstrated for avirulence to the 14 rice cultivars. The resistance gene that corresponds to the avirulence gene (Avr-Hattan 3) is thought to be located at the Pik locus. Resistance and susceptibility in response to the Chinese isolate in F3 lines of a cross of resistant and susceptible rice cultivars were very similar to the Pik tester isolate, Ken54-20. Random amplified polymorphic DNA markers and restriction fragment length polymorphism markers from genetic maps of the fungus were used to construct a partial genetic map of Avr-Hattan 3. We obtained several flanking markers and one co-segregated marker of Avr-Hattan 3 in the 144 mapping population.

Physical delimitation of the pepper Bs3 resistance gene specifying recognition of the AvrBs3 protein from Xanthomonas campestris pv. vesicatoria

2006 ◽  
Vol 113 (5) ◽  
pp. 895-905 ◽  
Author(s):  
Tina Jordan ◽  
Patrick Römer ◽  
Annett Meyer ◽  
Robert Szczesny ◽  
Michele Pierre ◽  
...  
Keyword(s):  
Resistance Gene ◽  
Xanthomonas Campestris

scholarly journals Grouping of Rice Cultivars based on Reaction Pattern to Philippine Races of Bacterial Blight Pathogen (Xanthomonas campestris pv. oryzae)

1991 ◽  
Vol 41 (1) ◽  
pp. 109-119 ◽  
Author(s):  
Tsugufumi OGAWA ◽  
George A. BUSTO ◽  
Jr.Rodante E. TABIEN ◽  
Gabriel.O. ROMERO ◽  
Noboru ENDO ◽  
...  
Keyword(s):  
Bacterial Blight ◽  
Xanthomonas Campestris ◽  
Reaction Pattern ◽  
Rice Cultivars ◽  
Bacterial Blight Pathogen

scholarly journals Evolution of an Avirulence Gene, AVR1-CO39, Concomitant with the Evolution and Differentiation of Magnaporthe oryzae

2005 ◽  
Vol 18 (11) ◽  
pp. 1148-1160 ◽  
Author(s):  
Yukio Tosa ◽  
Jun Osue ◽  
Yukiko Eto ◽  
Hong-Sik Oh ◽  
Hitoshi Nakayashiki ◽  
...  
Keyword(s):  
Resistance Gene ◽  
Ribosomal Dna ◽  
Magnaporthe Oryzae ◽  
Dna Sequences ◽  
Early Stage ◽  
Pyricularia Oryzae ◽  
Avirulence Gene ◽  
Rice Cultivars ◽  
Blast Fungus ◽  
Specific Subgroup

The significance of AVR1-CO39, an avirulence gene of the blast fungus corresponding to Pi-CO39(t) in rice cultivars, during the evolution and differentiation of the blast fungus was evaluated by studying its function and distribution in Pyricularia spp. When the presence or absence of AVR1-CO39 was plotted on a dendrogram constructed from ribosomal DNA sequences, a perfect parallelism was observed between its distribution and the phylogeny of Pyricularia isolates. AVR1-CO39 homologs were exclusively present in one species, Pyricularia oryzae, suggesting that AVR1-CO39 appeared during the early stage of evolution of P. oryzae. Transformation assays showed that all the cloned homologs tested are functional as an avirulence gene, indicating that selection has maintained their function. Nevertheless, Oryza isolates (isolates virulent on Oryza spp.) in P. oryzae exceptionally noncarriers of AVR1-CO39. All Oryza isolates suffered from one of the two types of known rearrangements at the Avr1-CO39 locus (i.e., G type and J type). These types were congruous to the two major lineages of Oryza isolates from Japan determined by MGR586 and MAGGY. These results indicate that AVR1-CO39 was lost during the early stage of evolution of the Oryza-specific subgroup of P. oryzae. Interestingly, its corresponding resistance gene, Pi-CO39(t), is not widely distributed in Oryza spp.

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