Exploring sheath blight quantitative trait loci in a Lemont/O. meridionalis advanced backcross population

Eizenga, G. C.; Jia, Melissa H.; Pinson, Shannon R. M.; Gasore, Elie R.; Prasad, Binod

doi:10.1007/s11032-015-0332-3

Cited by 15 publications

(10 citation statements)

References 82 publications

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“…However, to date, few major ShB resistance genes have been identified from either cultivated rice or wild rice relatives (Molla et al 2019). Over 25 quantitative trait locus (QTL) mapping studies have been performed using crosses from a diverse set of parents, including improved cultivars (Liu et al 2009;Li et al 1995;Zou et al 2000), landraces (Xu et al 2011;Taguchi-Shiobara et al 2013), and the wild rice species Oryza nivara (Eizenga et al 2013) and O. meridonalis (Eizenga et al 2015). These studies have produced a wealth of putative small-effect QTL; however, only a few of these loci, such as qSB-9 TQ (Zuo et al 2014) and qSB-11 LE (Zuo et al 2013) have been fine mapped and used for breeding.…”

Section: Introductionmentioning

confidence: 99%

Identification of Novel QTL Conferring Sheath Blight Resistance in Two Weedy Rice Mapping Populations

Goad

Jia

Gibbons

et al. 2020

Rice

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Background: Rice sheath blight (ShB) disease, caused by the pathogenic fungus Rhizoctonia solani, causes significant yield losses globally. US weedy rice populations, which are de-domesticated forms of indica and aus cultivated rice, appear to be more resistant to ShB than local japonica cultivated rice. We mapped quantitative trait loci (QTL) associated with ShB resistance using two F 8 recombinant inbred line populations generated from crosses of an indica crop variety, Dee-Geo-Woo-Gen (DGWG), with individuals representing the two major US weed biotypes, straw hull (SH) and black hull awned (BHA). Results: We identified nine ShB resistance QTL across both mapping populations. Five were attributable to alleles that affect plant height (PH) and heading date (HD), two growth traits that are known to be highly correlated with ShB resistance. By utilizing an approach that treated growth traits as covariates in the mapping model, we were able to infer that the remaining four QTL are involved in ShB resistance. Two of these, qShB1-2 and qShB4, are different from previously identified ShB QTL and represent new candidates for further study. Conclusion: Our findings suggest that ShB resistance can be improved through favorable plant growth traits and the combined effects of small to moderate-effect resistance QTL. Additionally, we show that including PH and HD as covariates in QTL mapping models is a powerful way to identify new ShB resistance QTL.

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Section: Introductionmentioning

confidence: 99%

Identification of Novel QTL Conferring Sheath Blight Resistance in Two Weedy Rice Mapping Populations

Goad

Jia

Gibbons

et al. 2020

Rice

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“…Most of the earlier mapping populations were based on the partially resistant indica genotypes such as Teqing and Jasmine 85 and the susceptible japonica genotype, Lemont ( Li et al, 1995 ; Pan et al, 1999 ; Wen et al, 2015 ). Using these mapping populations, a large number of QTLs governing sheath blight resistance have been mapped ( Li et al, 1995 ; Zou et al, 2000 ; Liu et al, 2009 ; Eizenga et al, 2015 ). Eizenga et al (2013 , 2015) also have identified resistance sources from wild accessions of O. nivara and O. meridionalis .…”

Section: Crop Improvement Strategies Against R Solanimentioning

confidence: 99%

“…Using these mapping populations, a large number of QTLs governing sheath blight resistance have been mapped ( Li et al, 1995 ; Zou et al, 2000 ; Liu et al, 2009 ; Eizenga et al, 2015 ). Eizenga et al (2013 , 2015) also have identified resistance sources from wild accessions of O. nivara and O. meridionalis . QTLs for resistance have been mapped from weedy rice also ( Goad et al, 2020 ; Jia et al, 2022 ).…”

Section: Crop Improvement Strategies Against R Solanimentioning

confidence: 99%

Rhizoctonia solani Kühn Pathophysiology: Status and Prospects of Sheath Blight Disease Management in Rice

et al. 2022

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Sheath blight caused by necrotrophic fungus Rhizoctonia solani Kühn is one of the most serious diseases of rice. Use of high yielding semi dwarf cultivars with dense planting and high dose of nitrogenous fertilizers accentuates the incidence of sheath blight in rice. Its diverse host range and ability to remain dormant under unfavorable conditions make the pathogen more difficult to manage. As there are no sources of complete resistance, management through chemical control has been the most adopted method for sheath blight management. In this review, we provide an up-to-date comprehensive description of host-pathogen interactions, various control measures such as cultural, chemical, and biological as well as utilizing host plant resistance. The section on utilizing host plant resistance includes identification of resistant sources, mapping QTLs and their validation, identification of candidate gene(s) and their introgression through marker-assisted selection. Advances and prospects of sheath blight management through biotechnological approaches such as overexpression of genes and gene silencing for transgenic development against R. solani are also discussed.

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“…Association mapping of simple sequence repeats in rice genomes including landraces, further identified several markers significantly associated with ShB resistance (Jia et al 2012;Lavale et al 2018). However, the reliability of those QTLs is variable, as most of the QTLs remain undetected in multiple environments and/or mapping populations (Zuo et al 2014;Eizenga et al 2015). A recent genome-wide association study predicted two reliable QTL in rice based on significant correlation of the identified loci with ShB resistance in 299 cultivars (Chen et al 2019).…”

Section: Selection and Breedingmentioning

confidence: 99%

Sheath blight of rice: a review and identification of priorities for future research

Singh

Mazumdar

Harikrishna

et al. 2019

Planta

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101

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Exploring sheath blight quantitative trait loci in a Lemont/O. meridionalis advanced backcross population

Cited by 15 publications

References 82 publications

Identification of Novel QTL Conferring Sheath Blight Resistance in Two Weedy Rice Mapping Populations

Identification of Novel QTL Conferring Sheath Blight Resistance in Two Weedy Rice Mapping Populations

Rhizoctonia solani Kühn Pathophysiology: Status and Prospects of Sheath Blight Disease Management in Rice

Sheath blight of rice: a review and identification of priorities for future research

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