Assessment of quantitative resistance of rice cultivars to Xanthomonas campestris pv. Oryzae: a comparison of inoculation methods

Euphytica ◽  
1991 ◽  
Vol 54 (2) ◽  
pp. 169-175
Author(s):  
M. Koch ◽  
J. E. Parlevliet ◽  
T. W. Mew
Keyword(s):  
Xanthomonas Campestris ◽  
Quantitative Resistance ◽  
Rice Cultivars ◽  
Inoculation Methods

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 Sources and Origin of Resistance to Xanthomonas campestris pv. campestris in Brassica Genomes

2002 ◽  
Vol 92 (1) ◽  
pp. 105-111 ◽  
Author(s):  
J. D. Taylor ◽  
J. Conway ◽  
S. J. Roberts ◽  
D. Astley ◽  
J. G. Vicente
Keyword(s):  
Xanthomonas Campestris ◽  
Quantitative Resistance ◽  
Nonspecific Resistance ◽  
Resistant Species ◽  
B Genome ◽  
Brassica Spp ◽  
A Genome ◽  
Race 4 ◽  
Xanthomonas Campestris Pv Campestris ◽  
Made In

Two hundred and seventy-six accessions of mainly Brassica spp. were screened for resistance to Xanthomonas campestris pv. campestris races. In Brassica oleracea (C genome), the majority of accessions were susceptible to all races, but 43% showed resistance to one or more of the rare races (2, 3, 5, and 6) and a single accession showed partial resistance to races 1, 3, 5, and 6. Further searches for resistance to races 1 and 4, currently the most important races worldwide, and race 6, the race with the widest host range, were made in accessions representing the A and B genomes. Strong resistance to race 4 was frequent in B. rapa (A genome) and B. napus (AC genome), indicating an A genome origin. Resistance to races 1 and 4 was present in a high proportion of B. nigra (B genome) and B. carinata (BC genome) accessions, indicating a B genome origin. B. juncea (AB genome) was the most resistant species, showing either strong resistance to races 1 and 4 or quantitative resistance to all races. Potentially race-nonspecific resistance was also found, but at a lower frequency, in B. rapa, B. nigra, and B. carinata. The combination of race-specific and race-nonspecific resistance could provide durable control of black rot of crucifers.

scholarly journals Dissecting quantitative resistance to Xanthomonas campestris pv. campestris in leaves of Brassica oleracea by QTL analysis

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Laura Iglesias-Bernabé ◽  
Pari Madloo ◽  
Víctor Manuel Rodríguez ◽  
Marta Francisco ◽  
Pilar Soengas
Keyword(s):  
Brassica Oleracea ◽  
Qtl Analysis ◽  
Xanthomonas Campestris ◽  
Quantitative Resistance ◽  
Xanthomonas Campestris Pv Campestris

scholarly journals Genome-Wide Association Analysis of the Genetic Basis for Sheath Blight Resistance in Rice

Rice ◽  
2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Fan Zhang ◽  
Dan Zeng ◽  
Cong-Shun Zhang ◽  
Jia-Ling Lu ◽  
Teng-Jun Chen ◽  
...  
Keyword(s):  
Genetic Basis ◽  
Quantitative Resistance ◽  
Association Studies ◽  
Sheath Blight ◽  
Rice Cultivars ◽  
Nucleotide Polymorphisms ◽  
Knowledge Based ◽  
Locus Method ◽  
Genome Wide ◽  
Environmentally Sound

Abstract Background Sheath blight (ShB), caused by Rhizoctonia solani Kühn, is one of the most destructive rice diseases. Developing ShB-resistant rice cultivars represents the most economical and environmentally sound strategy for managing ShB. Results To characterize the genetic basis for ShB resistance in rice, we conducted association studies for traits related to ShB resistance, namely culm length (CL), lesion height (LH), and relative lesion height (RLH). Combined a single locus genome-wide scan and a multi-locus method using 2,977,750 single-nucleotide polymorphisms to analyse 563 rice accessions, we detected 134, 562, and 75 suggestive associations with CL, LH, and RLH, respectively. The adjacent signals associated with RLH were merged into 27 suggestively associated loci (SALs) based on the estimated linkage disequilibrium blocks. More than 44% of detected RLH-SALs harboured multiple QTLs/genes associated with ShB resistance, while the other RLH-SALs were putative novel ShB resistance loci. A total of 261 ShB resistance putative functional genes were screened from 23 RLH-SALs according to bioinformatics and haplotype analyses. Some of the annotated genes were previously reported to encode defence-related and pathogenesis-related proteins, suggesting that quantitative resistance to ShB in rice is mediated by SA- and JA-dependent signalling pathways. Conclusions Our findings may improve the application of germplasm resources as well as knowledge-based ShB management and the breeding of ShB-resistant rice cultivars.

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