Identification and fine mapping of spot blotch (Bipolaris sorokiniana) resistance gene Sb4 in wheat

Zhang, Panpan; Guo, Guanghao; Wu, Qiuhong; Chen, Yongxing; Xie, Jingzhong; Lü, Ping; Li, Beibei; Dong, Lingli; Li, Miaomiao; Wang, Rongge; Yuan, Chengguo; Zhang, Huaizhi; Zhü, Kèyù; Li, Wenling; Li, Yong

doi:10.1007/s00122-020-03610-3

Cited by 50 publications

(41 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The third gene, Sb3, was mapped on chromosome 3BS (Lu et al, 2016), being in the same region where two previously reported QTLs Qsb.bhu 3B and Qsb.cim 3B reside. Recently, the Sb4 gene has been mapped on the long arm of chromosome 4B, where 21 putative genes were predicted (Zhang et al, 2020). QTLs with minor effects are also important for SB resistance since stacking such QTLs significantly reduced SB severity (Singh et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Dissecting Quantitative Trait Loci for Spot Blotch Resistance in South Asia Using Two Wheat Recombinant Inbred Line Populations

Roy

Gahtyari

et al. 2021

Front. Plant Sci.

View full text Add to dashboard Cite

Spot blotch (SB) disease causes significant yield loss in wheat production in the warm and humid regions of the eastern Gangetic plains (EGP) of South Asia (SA). Most of the cultivated varieties in the eastern part of SA are affected by SB under favorable climatic conditions. To understand the nature of SB resistance and map the underlying resistant loci effective in SA, two bi-parental mapping populations were evaluated for 3 years, i.e., 2013–2015 for the BARTAI × CIANO T79 population (denoted as BC) and 2014–2016 for the CASCABEL × CIANO T79 population (CC), at Varanasi, Uttar Pradesh, India. DArTSeq genotyping-by-sequencing (GBS) platform was used for genotyping of the populations. Distribution of disease reaction of genotypes in both populations was continuous, revealing the quantitative nature of resistance. Significant “genotype,” “year,” and “genotype × year” interactions for SB were observed. Linkage map with the genome coverage of 8,598.3 and 9,024.7 cM in the BC and CC population, respectively, was observed. Two quantitative trait loci (QTLs) were detected on chromosomes 1A and 4D in the BC population with an average contribution of 4.01 and 12.23% of the total phenotypic variation (PV), respectively. Seven stable QTLs were detected on chromosomes 1B, 5A, 5B, 6A, 7A, and 7B in the CC population explaining 2.89–10.32% of PV and collectively 39.91% of the total PV. The QTL detected at the distal end of 5A chromosome contributed 10.32% of the total PV. The QTLs on 6A and 7B in CC could be new, and the one on 5B may represent the Sb2 gene. These QTLs could be used in SB resistance cultivar development for SA.

show abstract

Section: Introductionmentioning

confidence: 99%

Dissecting Quantitative Trait Loci for Spot Blotch Resistance in South Asia Using Two Wheat Recombinant Inbred Line Populations

Roy

Gahtyari

et al. 2021

Front. Plant Sci.

View full text Add to dashboard Cite

show abstract

“…Thinopyrum curvifolium ) since introgression from it resulted in the identification of several Chirya lines resistant to SB [ 11 ]. Many of these resistant genotypes were used as a parent for identifying underlying QTLs/genes for SB resistance, including ‘Ning 8201’, ‘Chirya3’ [ 18 ], ‘Saar’ [ 19 ], ‘YS116’, ‘Yangmai6’ [ 20 ], ‘BH 1146’ [ 21 ], a synthetic derivative ‘SYN1’ [ 22 ], winter wheat line 621-7-1 [ 23 ], ‘Zhongyu1211’, ‘GY17’ [ 24 ] etc.…”

Section: Introductionmentioning

confidence: 99%

Identification of QTLs for Spot Blotch Resistance in Two Bi-Parental Mapping Populations of Wheat

Gahtyari

Roy

et al. 2021

Plants

View full text Add to dashboard Cite

Spot blotch (SB) disease caused by the hemibiotrophic pathogen Bipolaris sorokiniana inflicting major losses to the wheat grown in warm and highly humid areas of the Indian subcontinent, including Bangladesh, necessitates identification of QTLs stably expressing in Indian subcontinent conditions. Thus, two RIL mapping populations, i.e., WC (WUYA × CIANO T79) and KC (KATH × CIANO T79), were phenotyped at Dinajpur, Bangladesh for three consecutive years (2013–2015) and genotyped on a DArTseq genotyping by sequencing (GBS) platform at CIMMYT, Mexico. In both populations, quantitative inheritance along with transgressive segregation for SB resistance was identified. The identified QTLs were mostly minor and were detected on 10 chromosomes, i.e., 1A, 1B, 2A, 2B, 2D, 4B, 4D, 5A, 5D, and 7B. The phenotypic variation explained by the identified QTLs ranged from 2.3–15.0%, whereby QTLs on 4B (13.7%) and 5D (15.0%) were the largest in effect. The identified QTLs upon stacking showed an additive effect in lowering the SB score in both populations. The probable presence of newly identified Sb4 and durable resistance gene Lr46 in the identified QTL regions indicates the importance of these genes in breeding for SB resistance in Bangladesh and the whole of South Asia.

show abstract

“…QTLs for spot blotch resistance. Resistance to spot blotch is mainly associated with the major R genes (Sb1-Sb4) as well as QTLs, which may or may not overlap the known major genes (Lillemo et al 2013, Kumar et al 2015Lu et al 2016;Zhang et al 2020). The genetics of resistance to spot blotch has also been studied taking the disease as a quantitative trait (Gupta et al 2018).…”

Section: Genetics Of Sensitivitymentioning

confidence: 99%

“…Using bulked segregant analysis (BSA), Sb3 gene was also ne-mapped on chromosome arm 3BS near two other QTLs (QSb.bhu-3B and QSb.cim-3B; Lu et al 2016). The fourth resistance gene Sb4 was recently identi ed and mapped on chromosome arm 4BL using segregant RNA-Seq (BSR-Seq) analysis and SNP mapping (Zhang et al 2020). The locus with Sb4 carried 21 genes.…”

Section: Genetics Of Sensitivitymentioning

confidence: 99%

Sensitivity genes in wheat and corresponding effector genes in necrotrophs exhibiting inverse gene-for-gene relationship

Gupta¹,

Vasistha

Singh

2021

Preprint

View full text Add to dashboard Cite

In wheat, genes for resistance (R) as well as susceptibility (S) are now known for several diseases. The S genes also include sensitivity genes like Tsn1 in wheat. R genes follow a gene-for-gene (GFG) relationship and generally involve biotrophs and S genes particularly sensitivity genes, follow an inverse gene-for-gene relationship (IGFG), generally involving necrotroph or hemi-biotroph pathogens. The toxin (virulence factor) genes of the pathogen and the corresponding sensitivity genes have been described in some detail for the following three pathogens: (i) Paratagonospora nodorum (causing Septoria nodorum blotch or SNB); (ii) Pyrenophora tritici-repentis (tan spot) and (iii) Bipolaris sorokiniana (spot blotch). These and some other pathogens produce several necrotrophic effectors (NEs), which interact directly or indirectly with the products of S genes in the host and produce disease symptoms like necrosis and/or chlorosis. In this article we present a critical review of all the relevant information about the interactions between NEs of the above three pathogens and the corresponding S genes in wheat. The gaps in knowledge and possibilities for future research are also discussed.

show abstract

Identification and fine mapping of spot blotch (Bipolaris sorokiniana) resistance gene Sb4 in wheat

Cited by 50 publications

References 31 publications

Dissecting Quantitative Trait Loci for Spot Blotch Resistance in South Asia Using Two Wheat Recombinant Inbred Line Populations

Dissecting Quantitative Trait Loci for Spot Blotch Resistance in South Asia Using Two Wheat Recombinant Inbred Line Populations

Identification of QTLs for Spot Blotch Resistance in Two Bi-Parental Mapping Populations of Wheat

Sensitivity genes in wheat and corresponding effector genes in necrotrophs exhibiting inverse gene-for-gene relationship

Contact Info

Product

Resources

About