Two loci in sorghum with NB-LRR encoding genes confer resistance to Colletotrichum sublineolum

Biruma, M.; Martin, Tom; Fridborg, Ingela; Okori, P.; Dixelius, Christina

doi:10.1007/s00122-011-1764-8

Cited by 34 publications

(36 citation statements)

References 62 publications

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“…Our result is consistent with three previous studies in sorghum that reported NBS-LRR genes conferring resistance to fungal pathogens; St-R gene cluster conferring resistance to Setosphaeria turcica causing northern leaf blight in maize [55], Cs1 and Cs2 genes conferring resistance to Colletotrichum sublineolum causing anthracnose [56] and Rph 1-2 conferring resistance to leaf rust [3,57]. …”

Section: Discussionsupporting

confidence: 93%

Two distinct classes of QTL determine rust resistance in sorghum

Wang

Mace²,

Hunt

et al. 2014

BMC Plant Biol

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BackgroundAgriculture is facing enormous challenges to feed a growing population in the face of rapidly evolving pests and pathogens. The rusts, in particular, are a major pathogen of cereal crops with the potential to cause large reductions in yield. Improving stable disease resistance is an on-going major and challenging focus for many plant breeding programs, due to the rapidly evolving nature of the pathogen. Sorghum is a major summer cereal crop that is also a host for a rust pathogen Puccinia purpurea, which occurs in almost all sorghum growing areas of the world, causing direct and indirect yield losses in sorghum worldwide, however knowledge about its genetic control is still limited. In order to further investigate this issue, QTL and association mapping methods were implemented to study rust resistance in three bi-parental populations and an association mapping set of elite breeding lines in different environments.ResultsIn total, 64 significant or highly significant QTL and 21 suggestive rust resistance QTL were identified representing 55 unique genomic regions. Comparisons across populations within the current study and with rust QTL identified previously in both sorghum and maize revealed a high degree of correspondence in QTL location. Negative phenotypic correlations were observed between rust, maturity and height, indicating a trend for both early maturing and shorter genotypes to be more susceptible to rust.ConclusionsThe significant amount of QTL co-location across traits, in addition to the consistency in the direction of QTL allele effects, has provided evidence to support pleiotropic QTL action across rust, height, maturity and stay-green, supporting the role of carbon stress in susceptibility to rust. Classical rust resistance QTL regions that did not co-locate with height, maturity or stay-green QTL were found to be significantly enriched for the defence-related NBS-encoding gene family, in contrast to the lack of defence-related gene enrichment in multi-trait effect rust resistance QTL. The distinction of disease resistance QTL hot-spots, enriched with defence-related gene families from QTL which impact on development and partitioning, provides plant breeders with knowledge which will allow for fast-tracking varieties with both durable pathogen resistance and appropriate adaptive traits.Electronic supplementary materialThe online version of this article (doi:10.1186/s12870-014-0366-4) contains supplementary material, which is available to authorized users.

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Section: Discussionsupporting

confidence: 93%

Two distinct classes of QTL determine rust resistance in sorghum

Wang

Mace²,

Hunt

et al. 2014

BMC Plant Biol

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“…These include calmodulin (Pavir.Hb00190) [70, 71], WD domain (Pavir.J03445) [72, 73], and transposable elements (Pavir.Fb0150) [74, 75]. This highlights the diversity and potential for gene diversification of RGHs encoded by the switchgrass genome.…”

Section: Discussionmentioning

confidence: 99%

Identification, characterization, and gene expression analysis of nucleotide binding site (NB)-type resistance gene homologues in switchgrass

et al. 2016

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BackgroundSwitchgrass (Panicum virgatum L.) is a warm-season perennial grass that can be used as a second generation bioenergy crop. However, foliar fungal pathogens, like switchgrass rust, have the potential to significantly reduce switchgrass biomass yield. Despite its importance as a prominent bioenergy crop, a genome-wide comprehensive analysis of NB-LRR disease resistance genes has yet to be performed in switchgrass.ResultsIn this study, we used a homology-based computational approach to identify 1011 potential NB-LRR resistance gene homologs (RGHs) in the switchgrass genome (v 1.1). In addition, we identified 40 RGHs that potentially contain unique domains including major sperm protein domain, jacalin-like binding domain, calmodulin-like binding, and thioredoxin. RNA-sequencing analysis of leaf tissue from ‘Alamo’, a rust-resistant switchgrass cultivar, and ‘Dacotah’, a rust-susceptible switchgrass cultivar, identified 2634 high quality variants in the RGHs between the two cultivars. RNA-sequencing data from field-grown cultivar ‘Summer’ plants indicated that the expression of some of these RGHs was developmentally regulated.ConclusionsOur results provide useful insight into the molecular structure, distribution, and expression patterns of members of the NB-LRR gene family in switchgrass. These results also provide a foundation for future work aimed at elucidating the molecular mechanisms underlying disease resistance in this important bioenergy crop.Electronic supplementary materialThe online version of this article (doi:10.1186/s12864-016-3201-5) contains supplementary material, which is available to authorized users.

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“…The barley stripe mosaic virus (BSMV)-based VIGS vector was used to characterize multiple genes for their roles in disease resistance in wheat and barley (Hein et al, 2005; Scofield et al, 2005; Zhou et al, 2007; Sindhu et al, 2008). Several scientists have developed a brome mosaic virus (BMV)-based VIGS vector, and this vector was demonstrated to be a versatile tool for rapid gene function analysis in barley, rice, and maize (Ding et al, 2006; Pacak et al, 2010; van der Linde et al, 2011; Biruma et al, 2012). In rice seedlings, 19 and 13 NAC genes were up-regulated after RSV and RTSV infection, respectively, at different days after inoculation (Nuruzzaman et al, 2010).…”

Section: Roles Played By Nac Transcription Factorsmentioning

confidence: 99%

Roles of NAC transcription factors in the regulation of biotic and abiotic stress responses in plants

Nuruzzaman¹,

Sharoni²,

Kikuchi³

2013

Front. Microbiol.

638

435

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NAC transcription factors are one of the largest families of transcriptional regulators in plants, and members of the NAC gene family have been suggested to play important roles in the regulation of the transcriptional reprogramming associated with plant stress responses. A phylogenetic analysis of NAC genes, with a focus on rice and Arabidopsis, was performed. Herein, we present an overview of the regulation of the stress responsive NAC SNAC/(IX) group of genes that are implicated in the resistance to different stresses. SNAC factors have important roles for the control of biotic and abiotic stresses tolerance and that their overexpression can improve stress tolerance via biotechnological approaches. We also review the recent progress in elucidating the roles of NAC transcription factors in plant biotic and abiotic stresses. Modification of the expression pattern of transcription factor genes and/or changes in their activity contribute to the elaboration of various signaling pathways and regulatory networks. However, a single NAC gene often responds to several stress factors, and their protein products may participate in the regulation of several seemingly disparate processes as negative or positive regulators. Additionally, the NAC proteins function via auto-regulation or cross-regulation is extensively found among NAC genes. These observations assist in the understanding of the complex mechanisms of signaling and transcriptional reprogramming controlled by NAC proteins.

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Two loci in sorghum with NB-LRR encoding genes confer resistance to Colletotrichum sublineolum

Cited by 34 publications

References 62 publications

Two distinct classes of QTL determine rust resistance in sorghum

Two distinct classes of QTL determine rust resistance in sorghum

Identification, characterization, and gene expression analysis of nucleotide binding site (NB)-type resistance gene homologues in switchgrass

Roles of NAC transcription factors in the regulation of biotic and abiotic stress responses in plants

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