QTLs for Resistance to Major Rice Diseases Exacerbated by Global Warming: Brown Spot, Bacterial Seedling Rot, and Bacterial Grain Rot

Mizobuchi, Ritsuko; Fukuoka, Shuichi; Tsushima, Seiya; Yano, Masahiro; Sato, Hiroyuki

doi:10.1186/s12284-016-0095-4

Cited by 45 publications

(48 citation statements)

References 65 publications

(64 reference statements)

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“…Considerable research efforts have been conducted globally to develop resistant cultivars as an effective and sustainable strategy for management of BPB of rice. Unfortunately, no single genes or quantitative trait loci (QTLs) for complete resistance to BPB have been found so far [13,14]. Only several rice cultivars with partial resistance are available for commercial use.…”

Section: Genetic Resistancementioning

confidence: 99%

“…No resistant cultivars and breeding lines were identified in a study of screening 293 cultivars and lines using greenhouse inoculation at the flowering stage in 1983 [63,64]. From 1985 through 2013, there were nine reported studies that screened a total of 798 cultivars and breeding lines in the field and greenhouse and identified a total of 28 cultivars and lines showing partial resistance to BPB [13,[65][66][67][68][69][70][71][72][73]. Most recently, Mizobuchi et al [74] identified two tropical japonica cultivars, Kale and Jaguary, with a high level of resistance and several indica cultivars with moderate levels of resistance.…”

Section: Genetic Resistancementioning

confidence: 99%

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Sustainable Strategies for Managing Bacterial Panicle Blight in Rice

Zhou¹

2019

Protecting Rice Grains in the Post-Genomic Era

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Bacterial panicle blight (BPB) is present in more than 18 countries and has become a global disease in rice. BPB is highly destructive and can cause significant losses of up to 75% in yield and milling quality. BPB is caused by Burkholderia glumae or B. gladioli, with the former being the primary cause of the disease. Outbreaks of BPB are triggered by conditions of high temperatures in combination with high relative humidity at heading. The disease cycle starts with primary infections from infected seed, soil, and irrigation water, and subsequent secondary infections result from rain splash and panicle contact. Limited management options are available for control of BPB. There are only several cultivars including hybrids with partial resistance available currently. Twelve quantitative trait loci (QTLs) associated with the partial resistance have been identified. Oxolinic acid is an effective antibacterial compound for control of BPB in Japan, but it is not labeled for use on rice in the USA and many other countries. Sustainable control of BPB relies on integrated use of available management strategies of exclusion, genetic resistance, chemical control, biocontrol, and cultural practice. Developing and use of resistant cultivars is the best strategy to minimize the damage caused by BPB and maximize rice production in the long term.

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Section: Genetic Resistancementioning

confidence: 99%

Section: Genetic Resistancementioning

confidence: 99%

Sustainable Strategies for Managing Bacterial Panicle Blight in Rice

Zhou¹

2019

Protecting Rice Grains in the Post-Genomic Era

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“…Although the same organism (Burkholderia glumae) causes both BSR and BGR in rice, the number of reports of screening cultivars for resistance to BSR is smaller than that for BGR (Mizobuchi et al 2016), and no resistant cultivars have been found in common by different groups, likely because of the different methods used. Reported BSR evaluation methods include injection of a bacterial suspension into the soil at germination (Goto 1982(Goto , 1983, inoculation of sterilized seeds (Hirashima andWakimoto 1983, Maeda et al 2016), and inoculation of seedlings by spray (Sayler et al 2006) or needle (Wamishe et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of major rice cultivars for resistance to bacterial seedling rot caused by <i>Burkholderia glumae</i> and identification of Japanese standard cultivars for resistance assessments

et al. 2020

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Burkholderia glumae causes bacterial seedling rot (BSR) and bacterial grain rot (BGR) in rice (Oryza sativa), both of which are important diseases in Japan. We previously evaluated major Japanese cultivars for BGR resistance and selected standard cultivars for resistance assessments. Here, we assessed the BSR occurrence rate in cultivars from the World Rice Collection (WRC) and other sources and found wide variation in resistance. Next, we evaluated major Japanese cultivars for BSR resistance and found that two Japanese landraces, 'Kujuu' and 'Aikoku', showed "strong" resistance; most others were categorized as "medium" or "medium to weak". We previously developed a near-isogenic line (RBG1-NIL) by introducing the genomic region containing RBG1, a quantitative trait locus (QTL) for BSR resistance, from 'Nona Bokra' (indica) into 'Koshihikari' (temperate japonica). The resistance level of RBG1-NIL was "strong", indicating the effectiveness of RBG1 against BSR. The correlation between BSR and BGR resistance scores was low, indicating that it is necessary to introduce QTLs for resistance from different sources to develop cultivars resistant to both BSR and BGR. On the basis of the screening results, we selected standard cultivars for BSR resistance to cover a range of resistance levels.

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“…However, efforts to control the disease have been hindered by the lack of effective chemical control and few sources of genetic resistance being identified [6]. Although there are a few reports of quantitative trait loci being associated with improved resistance to the disease, breeding for resistance has been hindered by the lack of adapted germplasm, the difficulty of obtaining effective inoculations for disease screening, and the difficulty in quantifying disease symptoms [7,8]. Furthermore, investigations into identifying and quantifying incidence of BPB disease symptoms have been made, but information is still largely lacking.…”

Section: Introductionmentioning

confidence: 99%

Selection of Optimal Hyperspectral Wavebands for Detection of Discolored, Diseased Rice Seeds

et al. 2019

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The inspection of rice grain that may be infected by seedborne disease is important for ensuring uniform plant stands in production fields as well as preventing proliferation of some seedborne diseases. The goal of this study was to use a hyperspectral imaging (HSI) technique to find optimal wavelengths and develop a model for detecting discolored, diseased rice seed infected by bacterial panicle blight (Burkholderia glumae), a seedborne pathogen. For this purpose, the HSI data spanning the visible/near-infrared wavelength region between 400 and 1000 nm were collected for 500 sound and discolored rice seeds. For selecting optimal wavelengths to use for detecting diseased seed, a sequential forward selection (SFS) method combined with various spectral pretreatments was employed. To evaluate performance based on optimal wavelengths, support vector machine (SVM) and linear and quadratic discriminant analysis (LDA and QDA) models were developed for detection of discolored seeds. As a result, the violet and red regions of the visible spectrum were selected as key wavelengths reflecting the characteristics of the discolored rice seeds. When using only two or only three selected wavelengths, all of the classification methods achieved high classification accuracies over 90% for both the calibration and validation sample sets. The results of the study showed that only two to three wavelengths are needed to differentiate between discolored, diseased and sound rice, instead of using the entire HSI wavelength regions. This demonstrates the feasibility of developing a low cost multispectral imaging technology based on these selected wavelengths for non-destructive and high-throughput screening of diseased rice seed.

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QTLs for Resistance to Major Rice Diseases Exacerbated by Global Warming: Brown Spot, Bacterial Seedling Rot, and Bacterial Grain Rot

Cited by 45 publications

References 65 publications

Sustainable Strategies for Managing Bacterial Panicle Blight in Rice

Sustainable Strategies for Managing Bacterial Panicle Blight in Rice

Evaluation of major rice cultivars for resistance to bacterial seedling rot caused by <i>Burkholderia glumae</i> and identification of Japanese standard cultivars for resistance assessments

Selection of Optimal Hyperspectral Wavebands for Detection of Discolored, Diseased Rice Seeds

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