Phoma stem canker disease on oilseed rape (Brassica napus) in China is caused by Leptosphaeria biglobosa ‘brassicae’

Liu, Ze; Latunde‐Dada, A. O.; Hall, Avice; Fitt, Bruce D.L.

doi:10.1007/s10658-014-0513-7

Cited by 53 publications

(69 citation statements)

References 45 publications

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“…Four isolates (Thl-20, 21, 22 and 27) (cluster -10) appeared to be distinct from all other 'Thl' and reference strains. None of the 'Thl' isolates were found to be related to a pathogenic L. maculans strain collected in UK, and two L. biglobosa strains from the UK and China [15]. Importantly, a set of four isolates from barley fields (Thl-15, 16, 17 and 18) showed a close relationship with an aggressive strain (IBCN 2) originating from B. napus in Germany (cluster -1).…”

Section: Genetic Diversity Of P Lingam Isolatesmentioning

confidence: 97%

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Phenotypic, Biochemical and Molecular Diversity of Phoma lingam Fungal Isolates Collected from Saskatchewan, Canada

2016

IJSR

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Section: Genetic Diversity Of P Lingam Isolatesmentioning

confidence: 97%

“…[8,11,13]. Importantly, shifts of non pathogenic populations of P. lingam to a highly pathogenic state have been observed in Canada and on other continents [13,14,15].…”

Section: Introductionmentioning

confidence: 99%

Phenotypic, Biochemical and Molecular Diversity of Phoma lingam Fungal Isolates Collected from Saskatchewan, Canada

2016

IJSR

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“…Another Leptosphaeria species, Leptosphaeria biglobosa, has a similar life cycle to L. maculans and colonises oilseed rape plant tissues in a similar manner. L. biglobosa is less damaging in some countries (West et al, 2001), but was identified as the only causal agent of phoma stem canker in China (Liu et al, 2014). This fungus is present in all European countries, but its agronomic impact is considered negligible relative to that of L. maculans.…”

Section: Introductionmentioning

confidence: 99%

Impact of a resistance gene against a fungal pathogen on the plant host residue microbiome: the case of theLeptosphaeria maculans-Brassica napuspathosystem

Kerdraon

Barret

Balesdent

et al. 2020

Preprint

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Oilseed rape residues are a crucial determinant of stem canker epidemiology, as they support the sexual reproduction of the fungal pathogen Leptosphaeria maculans. The aim of this study was to characterise the impact of a resistance gene against L. maculans infection on residue microbial communities and to identify micro-organisms interacting with this pathogen during residue degradation. We used near-isogenic lines to obtain healthy and infected host plants. The microbiome associated with the two types of plant residues was characterised by metabarcoding. A combination of linear discriminant analysis and ecological network analysis was used to compare the microbial communities and to identify micro-organisms interacting with L. maculans. Fungal community structure differed between the two lines at harvest, but not subsequently, suggesting that the presence/absence of the resistance gene influences the microbiome at the base of the stem whilst the plant is alive, but that this does not necessarily lead to differential colonisation of the residues by fungi. Direct interactions with other members of the community involved many fungal and bacterial ASVs (amplicon sequence variants). L. maculans appeared to play a minor role in networks, whereas one ASV affiliated to Plenodomus biglobosus (synonym Leptosphaeria biglobosa) from the Leptosphaeria species complex was considered a keystone taxon in the networks at harvest. This approach could be used to identify and promote micro-organisms with beneficial effects against residue-borne pathogens, and more broadly, to decipher the complex interactions between multi-species pathosystems and other microbial components in crop residues.

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“…The disease is of particular concern in Asian region where the largest share (38%) of global cabbage is produced (Food and Agriculture Organization (FAO) Statistics Database 2017). In Asia, the disease is currently caused by the less aggressive species, L. biglobosa [6,[20][21][22][23]. But, there is concern that the more aggressive L. maculans may spread in this region [21,[23][24][25], which may threaten the Asian cabbage and oilseed rape industries [1,2,26,27].…”

Section: Introductionmentioning

confidence: 99%

Inheritance Pattern and Molecular Markers for Resistance to Blackleg Disease in Cabbage

Ferdous

Hossain

Park

et al. 2019

Plants

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The inheritance and causal loci for resistance to blackleg, a devastating disease of Brassicaceous crops, are yet to be known in cabbage (Brassica oleracea L.). Here, we report the pattern of inheritance and linked molecular marker for this trait. A segregating BC1 population consisting of 253 plants was raised from resistant and susceptible parents, L29 (♀) and L16 (♂), respectively. Cotyledon resistance bioassay of BC1 population, measured based on a scale of 0–9 at 12 days after inoculation with Leptosphaeria maculans isolate 03–02 s, revealed the segregation of resistance and ratio, indicative of dominant monogenic control of the trait. Investigation of potential polymorphism in the previously identified differentially expressed genes within the collinear region of ‘B. napus blackleg resistant loci Rlm1′ in B. oleracea identified two insertion/deletion (InDel) mutations in the intron and numerous single nucleotide polymorphisms (SNPs) throughout the LRR-RLK gene Bol040029, of which six SNPs in the first exon caused the loss of two LRR domains in the susceptible line. An InDel marker, BLR-C-InDel based on the InDel mutations, and a high resolution melting (HRM) marker, BLR-C-2808 based on the SNP C2808T in the second exon were developed, which predicated the resistance status of the BC1 population with 80.24%, and of 24 commercial inbred lines with 100% detection accuracy. This is the first report of inheritance and molecular markers linked with blackleg resistance in cabbage. This study will enhance our understanding of the trait, and will be helpful in marker assisted breeding aiming at developing resistant cabbage varieties.

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Phoma stem canker disease on oilseed rape (Brassica napus) in China is caused by Leptosphaeria biglobosa ‘brassicae’

Cited by 53 publications

References 45 publications

Phenotypic, Biochemical and Molecular Diversity of Phoma lingam Fungal Isolates Collected from Saskatchewan, Canada

Phenotypic, Biochemical and Molecular Diversity of Phoma lingam Fungal Isolates Collected from Saskatchewan, Canada

Impact of a resistance gene against a fungal pathogen on the plant host residue microbiome: the case of theLeptosphaeria maculans-Brassica napuspathosystem

Inheritance Pattern and Molecular Markers for Resistance to Blackleg Disease in Cabbage

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