Mapping of four major rice blast resistance genes from ’Lemont’ and ’Teqing’ and evaluation of their combinatorial effect for field resistance

Tabien, Rodante E.; Li, Z.; Paterson, Andrew H.; Marchetti, M. A.; Stansel, J. W.; Pinson, Shannon R. M.; Park, W. D.

doi:10.1007/s001220051600

Cited by 98 publications

(88 citation statements)

References 35 publications

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“…The consistent association of a QRL at either Xa4 or Xa25(t) against virulent races was observed for most dominant R genes in the rice-Xoo relationship (8,10). The correspondence between major R genes and QRL in genomic locations has been reported in several studies involving rice blast (11)(12)(13). Because of the low resolution in QTL mapping, this association between CR genes and QRL for PR could result from differentiated functions of different members in the R gene families (14), from the secondary functions of the same alleles of the R genes that can activate pathways leading to PR, or from both.…”

Section: Discussionmentioning

confidence: 66%

Complex genetic networks underlying the defensive system of rice ( Oryza sativa L.) to Xanthomonas oryzae pv. oryzae

Arif

Zhong

et al. 2006

Proc. Natl. Acad. Sci. U.S.A.

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Complete resistance (CR) and partial resistance (PR) of rice (Oryza sativa L.) to its bacterial pathogen, Xanthomonas oryzae pv. oryzae (Xoo), was genetically dissected by using 2 mapping populations and 10 Xoo races. Two CR genes, 50 quantitative resistance loci, and 60 digenic interactions were identified, which showed various degrees of race specificity to the Xoo races. The complex epistasis between these loci led us to the discovery of complex genetic networks underlying the rice defensive system to Xoo. The networks consisted of two major components: one representing interactions between alleles at the R loci of rice and alleles at the corresponding avirulence loci of Xoo for CR and the other comprising interactions between quantitative resistance loci in rice and their corresponding aggressiveness loci in Xoo for PR. The race specificity of PR and its strong genetic overlap with CR indicate that PR is essentially ''weaker'' CR. The genetic networks discovered are expected to maintain a high level of the allelic diversity at avirulent loci in the pathogen by stabilizing selection, which may maintain a high allelic diversity at R loci in the host by the frequencydependent selection.complete resistance ͉ epistasis ͉ partial resistance ͉ plant-pathogen interaction ͉ rice bacterial blight

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Section: Discussionmentioning

confidence: 66%

Complex genetic networks underlying the defensive system of rice ( Oryza sativa L.) to Xanthomonas oryzae pv. oryzae

Arif

Zhong

et al. 2006

Proc. Natl. Acad. Sci. U.S.A.

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“…Determination of QTLs is important for studying epistatic interactions and race specifity. More than 35 QTLs in rice were found near R genes for resistance to blast (Ballini et al, 2008;Fukuoka & Okuno, 1997;Tabien et al, 2000Tabien et al, , 2002. Identification of markers linked to QTL facilitates the targeting of recessive alleles, which can be masked by epistasis in the specific environment (Joshi & Nayak, 2010).…”

Section: Map-based Cloningmentioning

confidence: 99%

Mutagenesis in Plant Breeding for Disease and Pest Resistance

Kozjak¹,

Meglič²

2012

Mutagenesis

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“…Details of the experimental design, the measurements of statistics used to declare QTL were calculated using the method of Piepho (2001). phenotypes, and genotypes can be found in the original article by Tabien et al (2000). The phenotypes were Table 4 shows the results of joint mapping and separate analyses.…”

Section: R)mentioning

confidence: 99%

“…to Pi-tq5, Pi-lm2, and Pi-tq6 detected previously on the listed the probabilities of all the four possible phenotype combinations for all genotypes of each detected QTL basis of chi-square tests of individual marker-trait associations (Tabien et al 2000). Two additional loci (qtl2 in Table 5.…”

Section: R)mentioning

confidence: 99%

“…None of the genetic parameters, e.g., the QTL effects and positions, were estimable in the previous chi-square On the other hand, if we define the penetrance as the probability that the plant is affected by both pathogens, tests conducted by the original authors (Tabien et al 2000). The most striking result from the joint mapping then we should use Pr(IB54 ϭ S and IG1 ϭ S).…”

Section: R)mentioning

confidence: 99%

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Joint Mapping of Quantitative Trait Loci for Multiple Binary Characters

2005

Genetics

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Joint mapping for multiple quantitative traits has shed new light on genetic mapping by pinpointing pleiotropic effects and close linkage. Joint mapping also can improve statistical power of QTL detection. However, such a joint mapping procedure has not been available for discrete traits. Most disease resistance traits are measured as one or more discrete characters. These discrete characters are often correlated. Joint mapping for multiple binary disease traits may provide an opportunity to explore pleiotropic effects and increase the statistical power of detecting disease loci. We develop a maximum-likelihood method for mapping multiple binary traits. We postulate a set of multivariate normal disease liabilities, each contributing to the phenotypic variance of one disease trait. The underlying liabilities are linked to the binary phenotypes through some underlying thresholds. The new method actually maps loci for the variation of multivariate normal liabilities. As a result, we are able to take advantage of existing methods of joint mapping for quantitative traits. We treat the multivariate liabilities as missing values so that an expectation-maximization (EM) algorithm can be applied here. We also extend the method to joint mapping for both discrete and continuous traits. Efficiency of the method is demonstrated using simulated data. We also apply the new method to a set of real data and detect several loci responsible for blast resistance in rice.

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Mapping of four major rice blast resistance genes from ’Lemont’ and ’Teqing’ and evaluation of their combinatorial effect for field resistance

Cited by 98 publications

References 35 publications

Complex genetic networks underlying the defensive system of rice ( Oryza sativa L.) to Xanthomonas oryzae pv. oryzae

Complex genetic networks underlying the defensive system of rice ( Oryza sativa L.) to Xanthomonas oryzae pv. oryzae

Mutagenesis in Plant Breeding for Disease and Pest Resistance

Joint Mapping of Quantitative Trait Loci for Multiple Binary Characters

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