Mapping quantitative trait loci conferring resistance to Marssonina leaf spot disease in Populus deltoides

Jiang, Helen; Wan, Zhibing; Liu, Min; Hou, Jing; Yin, Tongming

doi:10.1007/s00468-018-01809-y

Cited by 4 publications

(6 citation statements)

References 48 publications

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“…The evidences pointed out that genes related to virulence could drive or have major roles to evolve Marssonina populations into the two diversification groups. In view of M. brunnea fungi as a typical hemibiotrophic pathogen only infecting wood crop poplars, our knowledge could facilitate the development of a model for exploring host specificity in woody plants with hemibiotrophic fungal pathogens with detailed poplar genome biology (Jiang et al, 2019).…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the two formae speciales can be an ideal model for gaining an insight into the mechanisms of host specificity. The MULT fungi were, to some extent, recorded with gene expressions due to their poplar hosts being the worldwide most commercially important poplar crops until nowadays (Yu et al, 1997;Zhang et al, 2007Zhang et al, , 2018bYuan et al, 2008;Cheng et al, 2010;Zhu et al, 2012;Jiang et al, 2014;Chen et al, 2015;Xing et al, 2018;Jiang et al, 2019). For example, the MULT strains induced many LysM effectors during infection (Yuan et al, 2008;Cheng et al, 2010;Zhu et al, 2012;Jiang et al, 2014;Chen et al, 2015;Zhang et al, 2018b).…”

Section: Introductionmentioning

confidence: 99%

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Distinctive Gene Expression Profiles and Effectors Consistent With Host Specificity in Two Formae Speciales of Marssonina brunnea

Ren

Yan

et al. 2020

Front. Microbiol.

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The knowledge on the host specificity of a pathogen underlying an interaction is becoming an urgent necessity for global warming. In this study, the gene expression profiles and the roles of effectors in host specificity were integrally characterized with two formae speciales, multigermtubi and monogermtubi, of a hemibiotrophic pathogen Marssonina brunnea when they were infecting respective susceptible poplar hosts. With a functional genome comparison referring to a de novo transcriptome of M. brunnea and Pathogen-Host Interaction database functional annotations, the multigermtubi strain showed abundant and significant differentially expressed unigenes (DEGs) (more than 40%) in colonizing the initial invasion stage and in the necrotrophic stage. The monogermtubi strain induced less than 10% of DEGs in the initial invasion stage but which abruptly increased to more than 80% DEGs in the necrotrophic stage. Both strains induced the least DEGs in the biotrophic stage compared to the initial invasion and necrotrophic stages. The orthologs of the effector genes Ecp6, PemG1, XEG1, ACE1, and Mg3LysM were exclusively induced by one of the two formae speciales depending on the infection stages. Some unigenes homologous to carbohydrate lytic enzyme genes, especially pectate lyases, were notably induced with multigermtubi forma specialis infection but not expressed in the monogermtubi forma specialis at an earlier infection stage. The extraordinary differences in the functional genome level between the two formae speciales of M. brunnea could be fundamental to exploring their host specificity determinant and evolution. This study also firstly provided the fungal transcriptome of the monogermtubi forma specialis for M. brunnea.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Distinctive Gene Expression Profiles and Effectors Consistent With Host Specificity in Two Formae Speciales of Marssonina brunnea

Ren

Yan

et al. 2020

Front. Microbiol.

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“…Besides leaf rust, candidate genes for resistance to other pests were identified combining mapping and genomic data. Two major leaf spot resistance QTLs were mapped using a P. deltoides F 1 population of 84 individuals, genotyped with 1398 AFLPs and 72 SSRs, and the sequences of molecular markers in linkage with this trait were aligned to poplar genome [ 76 ] ( Table 5 and Figure 1 ).…”

Section: An Overview Of Known Loci Co-segregating With Biotic Stress ...mentioning

confidence: 99%

Advanced Breeding for Biotic Stress Resistance in Poplar

Biselli

Vietto²,

Rosso³

et al. 2022

Plants

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Poplar is one of the most important forest trees because of its high economic value. Thanks to the fast-growing rate, easy vegetative propagation and transformation, and availability of genomic resources, poplar has been considered the model species for forest genetics, genomics, and breeding. Being a field-growing tree, poplar is exposed to environmental threats, including biotic stresses that are becoming more intense and diffused because of global warming. Current poplar farming is mainly based on monocultures of a few elite clones and the expensive and long-term conventional breeding programmes of perennial tree species cannot face current climate-change challenges. Consequently, new tools and methods are necessary to reduce the limits of traditional breeding related to the long generation time and to discover new sources of resistance. Recent advances in genomics, marker-assisted selection, genomic prediction, and genome editing offer powerful tools to efficiently exploit the Populus genetic diversity and allow enabling molecular breeding to support accurate early selection, increasing the efficiency, and reducing the time and costs of poplar breeding, that, in turn, will improve our capacity to face or prevent the emergence of new diseases or pests.

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“…A recent study has shown that two large-effect quantitative trait loci were responsible for the differentiation of MbMu resistance in P . deltoides [ 6 ]. P .…”

Section: Introductionmentioning

confidence: 99%

“…× euramericana were introduced into China in the 1970s from North America and Europe, and these poplars and their hybrids are widely cultivated in the country. In particular, elite cultivars with MbMu resistance have been planted on over 4 million acres in the lower-middle reaches of the Yangtze river basin, where MLSD is prevalent [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Population Genomics Reveals Population Structure and Mating-Type Loci in Marssonina brunnea

Cheng

Yang

Chen

et al. 2022

JoF

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Marssonina brunnea is an important fungal pathogen of poplar trees. We collected 32 M. brunnea f.sp. multigermtubi (MbMu) and three M. brunnea f.sp. monogermtubi (MbMo) isolates from four poplar species in three Chinese regions and performed genome resequencing. An annotation of SNPs of MbMu indicated that the SNPs potentially have a functional effect on 69.2% of the predicted genes. Using the SNP dataset of nonredundant isolates, a structure and principal component analysis revealed that MbMu and MbMo belong to two genetically distinct populations. By contrast, subpopulation structures could not be found among MbMu isolates. A neighbor-net analysis and a homoplasy index test provided evidence of recombination among MbMu isolates. The short distance (109–174 bp) of linkage disequilibrium half-decay supported the presence of a high level of recombination in the MbMu population. The genetic architectures of the MAT loci of MbMu and MbMo were revealed by searching genome assemblies or by homology-based cloning, and a BLAST search verified each isolate carrying one of the two opposite MAT loci. This study revealed that the MbMu population contains a wide range of functional variants, shows high-frequency recombination, and exhibits heterothallic mating systems, indicating high evolutionary potential and a resultant threat to poplar plantations.

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Mapping quantitative trait loci conferring resistance to Marssonina leaf spot disease in Populus deltoides

Cited by 4 publications

References 48 publications

Distinctive Gene Expression Profiles and Effectors Consistent With Host Specificity in Two Formae Speciales of Marssonina brunnea

Distinctive Gene Expression Profiles and Effectors Consistent With Host Specificity in Two Formae Speciales of Marssonina brunnea

Advanced Breeding for Biotic Stress Resistance in Poplar

Population Genomics Reveals Population Structure and Mating-Type Loci in Marssonina brunnea

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