Mapping of qBK1, a major QTL for bakanae disease resistance in rice

Hur, Yeon-Jae; Lee, Sais Beul; Kim, Tae‐Heon; Kwon, Tackmin; Lee, Jonghee; Shin, Dongjin; Park, Soo-Kwon; Hwang, Un-Ha; Cho, Jun Hyeon; Yoon, Young Mi; Yeo, Un-Sang; Song, You-Chun; Kwak, Do‐Yeon; Nam, Min‐Hee; Park, Dong-Soo

doi:10.1007/s11032-015-0281-x

Cited by 39 publications

(49 citation statements)

References 27 publications

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“…Host resistance to bakanae is the most effective means to control the disease; however, there is only a small number of varieties showing resistance to the disease worldwide (Hur et al ., ; M. Aragona, unpublished observations). Alternatively, the use of healthy seed is the most valid preventive measure for the control of bakanae.…”

Section: Introductionmentioning

confidence: 73%

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Genetic variability of Fusarium fujikuroi populations associated with bakanae of rice in Italy

Valente

Desiderio²,

Infantino

et al. 2016

Plant Pathology

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The heterothallic ascomycete Fusarium fujikuroi (teleomorph: Gibberella fujikuroi) is the causal agent of bakanae of rice, a disease of increasing economic importance in the major rice‐producing areas in the world and a serious threat for Italian rice cultivation. A few studies have characterized F. fujikuroi isolates in America and the Philippines but no data are available on the genetic structure of Italian pathogen populations. Microsatellite SSRs are useful tools to study the intraspecific diversity at population level. In this study, 19 polymorphic SSRs have been identified and applied to characterize the genetic variation of 334 isolates of F. fujikuroi coming from eight Italian rice‐growing areas. A high degree of diversity at haplotype level has emerged: in the eight populations, 107 unique haplotypes were scored. Analysis of molecular variance (amova) showed that 98% of genetic variability occurred within F. fujikuroi Italian populations, as confirmed by the allelic Shannon index ranging from 0.56 to 1.06. The presence of a 1:1 ratio of mating type alleles in six out of eight of the Italian fungal populations suggests a potential for sexual reproduction in the field. However, the high fraction of clonality (43%), confirmed by neighbour‐joining clustering analysis, and the high level of linkage disequilibrium observed, indicates that reproduction of F. fujikuroi is mostly clonal in Italy. All data suggest that the observed genetic variability was probably mediated by human activity and transmission by rice seeds.

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Section: Introductionmentioning

confidence: 73%

“…Host resistance to bakanae is the most effective means to control the disease; however, there is only a small number of varieties showing resistance to the disease worldwide (Hur et al, 2015;M. Aragona, unpublished observations).…”

Section: Introductionmentioning

confidence: 99%

Genetic variability of Fusarium fujikuroi populations associated with bakanae of rice in Italy

Valente

Desiderio²,

Infantino

et al. 2016

Plant Pathology

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“…Rice varieties with a single resistance gene are at an increased risk of being overcome by new pathological races (Lee et al 2017;Lee et al 2018). The development of a rice variety with a higher level of resistance against bakanae disease is a major challenge in many countries (Cumagun et al 2011;Bashyal et al 2014;Fiyaz et al 2016;Hur et al 2015;Hur et al 2016). In this study, we identi ed qBK1 z locus related to bakanae disease resistance based on genotype and phenotype analyses of homozygous recombinants on the recombinant progeny of Ilpum and Zenith, using SSR and newly developed InDel markers.…”

Section: Discussionmentioning

confidence: 99%

“…Fiyaz et al (2016) mapped qBK1.1 to a 20 kb region between markers RM9 and RM11232 from the Pusa 1121/Pusa1342 cross. These authors hypothesized that qBK1.1 and qBK1 (Hur et al 2015) might be the same QTL as they had overlapping positions. Ji et al (2017) found that QTL qFfR1 was located in a 230 kb region of rice chromosome 1 in Korean japonica variety Nampyeong, and suggested that the three QTLs qBK1, qBK1.1, and qFfR1 might indicate the same gene.…”

Section: Discussionmentioning

confidence: 99%

“…Yang et al (2006) identi ed two QTLs located on chromosome 1 and chromosome 10 by in vitro evaluation of the Chunjiang 06/TN1 doubled haploid population. Hur et al (2015) identi ed a major QTL, qBK1, on chromosome 1 from 168 BC 6 F 4 near isogenic lines (NILS) generated by crossing the resistant indica variety Shingwang with susceptible japonica variety Ilpum. Lee et al (2019) delimited the location of qBK1 to 35 kb interval between two InDel markers, InDel 18 (23.637 Mbp) and .…”

Section: Introductionmentioning

confidence: 99%

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Mapping of a major QTL, qBK1Z, for bakanae disease resistance in rice

Lee

Kim

et al. 2020

Preprint

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Background: Bakanae disease is a fungal disease of rice (Oryza sativa L.) caused by the pathogen Gibberella fujikuroi (also known as Fusarium fujikuroi). Recently the disease incidence has increased in several Asian countries and continues to spread throughout the world. No rice varieties have been developed yet to be completely resistant to this disease. With increasing need to identify various genetic resources to impart resistance to local elite varieties, this study was carried out to identify novel quantitative trait loci (QTLs) from an indica variety Zenith. Results: We performed a QTL mapping using 180 F2:9 recombinant inbred lines (RILs) derived from a cross between the resistant variety, Zenith, and the susceptible variety, Ilpum. A primary QTL study using the genotypes and phenotypes of the RILs indicated that the locus qBK1z conferring bakanae disease resistance from the Zenith was located in a 2.8 Mb region bordered by the two SSR markers, RM1331 and RM3530 on chromosome 1. The log of odds (LOD) score of qBK1z was 13.43, accounting for 30.9% of the total phenotypic variation. A finer localization of qBK1z was delimited at an approximate 730 kb interval in the physical map between Chr01_1435908 (1.43 Mbp) and RM10116 (2.16 Mbp).Conclusion: The development of a rice variety with a higher level of resistance against bakanae disease is a major challenge in many rice growing countries. Introducing qBK1z or pyramiding with other previously identified QTLs could provide effective genetic control of bakanae disease in rice.

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