scholarly journals Development of ascochyta blight (Ascochyta rabiei) in chickpea as affected by host resistance and plant age

2007 ◽  
pp. 77-86
Author(s):  
A. K. Basandrai ◽  
D. Basandrai ◽  
S. Pande ◽  
M. Sharma ◽  
Sanjay K. Thakur ◽  
...  
Keyword(s):  
Host Resistance ◽  
Ascochyta Blight ◽  
Plant Age ◽  
Ascochyta Rabiei

scholarly journals Development of ascochyta blight (Ascochyta rabiei) in chickpea as affected by host resistance and plant age

2007 ◽  
Vol 119 (1) ◽  
pp. 77-86 ◽  
Author(s):  
A. K. Basandrai ◽  
D. Basandrai ◽  
S. Pande ◽  
M. Sharma ◽  
Sanjay K. Thakur ◽  
...  
Keyword(s):  
Host Resistance ◽  
Ascochyta Blight ◽  
Plant Age ◽  
Ascochyta Rabiei

scholarly journals Reference Genome Assembly for Australian Ascochyta rabiei Isolate ArME14

2020 ◽  
Vol 10 (7) ◽  
pp. 2131-2140
Author(s):  
Ramisah Mohd Shah ◽  
Angela H. Williams ◽  
James K. Hane ◽  
Julie A. Lawrence ◽  
Lina M. Farfan-Caceres ◽  
...  
Keyword(s):  
Secondary Metabolite ◽  
Dna Sequences ◽  
Genome Assembly ◽  
Ascochyta Blight ◽  
Ascochyta Rabiei ◽  
Causal Organism ◽  
Protein Coding ◽  
Putative Protein ◽  
Genomic Regions ◽  
Genome Assemblies

Ascochyta rabiei is the causal organism of ascochyta blight of chickpea and is present in chickpea crops worldwide. Here we report the release of a high-quality PacBio genome assembly for the Australian A. rabiei isolate ArME14. We compare the ArME14 genome assembly with an Illumina assembly for Indian A. rabiei isolate, ArD2. The ArME14 assembly has gapless sequences for nine chromosomes with telomere sequences at both ends and 13 large contig sequences that extend to one telomere. The total length of the ArME14 assembly was 40,927,385 bp, which was 6.26 Mb longer than the ArD2 assembly. Division of the genome by OcculterCut into GC-balanced and AT-dominant segments reveals 21% of the genome contains gene-sparse, AT-rich isochores. Transposable elements and repetitive DNA sequences in the ArME14 assembly made up 15% of the genome. A total of 11,257 protein-coding genes were predicted compared with 10,596 for ArD2. Many of the predicted genes missing from the ArD2 assembly were in genomic regions adjacent to AT-rich sequence. We compared the complement of predicted transcription factors and secreted proteins for the two A. rabiei genome assemblies and found that the isolates contain almost the same set of proteins. The small number of differences could represent real differences in the gene complement between isolates or possibly result from the different sequencing methods used. Prediction pipelines were applied for carbohydrate-active enzymes, secondary metabolite clusters and putative protein effectors. We predict that ArME14 contains between 450 and 650 CAZymes, 39 putative protein effectors and 26 secondary metabolite clusters.

scholarly journals Identification of novel sources of resistance to ascochyta blight in a collection of wild Cicer accessions

2020 ◽  
Author(s):  
Toby E. Newman ◽  
Silke Jacques ◽  
Christy Grime ◽  
Fiona L. Kamphuis ◽  
Robert C. Lee ◽  
...  
Keyword(s):  
Genome Wide Association Study ◽  
Ascochyta Blight ◽  
Ascochyta Rabiei ◽  
Sources Of Resistance ◽  
Highly Pathogenic ◽  
Cicer Echinospermum ◽  
Genome Wide ◽  
A Genome ◽  
The Impact ◽  
Chickpea Cultivars

Chickpea production is constrained worldwide by the necrotrophic fungal pathogen Ascochyta rabiei, the causal agent of ascochyta blight (AB). In order to reduce the impact of this disease, novel sources of resistance are required in chickpea cultivars. Here, we screened a new collection of wild Cicer accessions for AB resistance and identified accessions resistant to multiple, highly pathogenic isolates. In addition to this, analyses demonstrated that some collection sites of Cicer echinospermum harbour predominantly resistant accessions, knowledge that can inform future collection missions. Furthermore, a genome-wide association study identified regions of the Cicer reticulatum genome associated with AB resistance and investigation of these regions identified candidate resistance genes. Taken together, these results can be utilised to enhance the resistance of chickpea cultivars to this globally yield-limiting disease.

Variation in pathogenicity among and within Mycosphaerella pinodes populations collected from field pea in Australia

1998 ◽  
Vol 76 (11) ◽  
pp. 1955-1966 ◽  
Author(s):  
J M Wroth
Keyword(s):  
Cluster Analysis ◽  
Pisum Sativum ◽  
Host Resistance ◽  
Ascochyta Blight ◽  
Mycosphaerella Pinodes ◽  
Environment Interaction ◽  
Pathogen Population ◽  
Host Genotype ◽  
Host Pathogen Interaction ◽  
The Relationship

Ninety-nine single ascospore isolates of Mycosphaerella pinodes (Berk. & Blox.) Vestergr. from widely separated locations in southern Australia varied greatly in their ability to cause disease in leaves and stems of 10 host genotypes when assayed at two inoculum pressures. There were highly significant differences between the infection pressures, isolates, and host genotypes that accounted for most of the variance. A small proportion of the variance included a highly significant host genotype beta isolate interactions in leaves and stems and a highly significant host genotype beta isolate beta environment interaction in leaves. The continuous variation in disease responses among isolates precluded classification into distinct pathotypes. A cluster analysis of the data revealed that many isolates were closely related irrespective of the host cultivar or location from which they were collected. The relationship between mean host resistance and the variation among isolates was assessed, and it was concluded that increasing host resistance was unlikely to increase variation in the pathogen population; therefore, resistance should be relatively stable.Key words: Ascochyta blight, Pisum sativum, host-pathogen interaction, cluster analysis.

CDC Corinne desi chickpea

2009 ◽  
Vol 89 (3) ◽  
pp. 515-516 ◽  
Author(s):  
B. Taran ◽  
T. Warkentin ◽  
S. Banniza ◽  
A. Vandenberg
Keyword(s):  
Cicer Arietinum ◽  
Ascochyta Blight ◽  
Yield Potential ◽  
Ascochyta Rabiei ◽  
Western Canada ◽  
Canadian Prairies ◽  
Cicer Arietinum L ◽  
Crop Development ◽  
Cultivar Description ◽  
Release Program

CDC Corinne, a desi chickpea (Cicer arietinum L.) cultivar, was released in 2008 by the Crop Development Centre, University of Saskatchewan, for distribution to Select seed growers in western Canada through the Variety Release Program of the Saskatchewan Pulse Growers. CDC Corinne has a pinnate leaf type, fair resistance to ascochyta blight [Ascochyta rabiei (Pass.) Lab.], medium maturity, medium seed size and higher yield potential than Myles in the Brown and Dark Brown soil zones of the Canadian prairies. Key words: Chickpea, Cicer arietinum L., cultivar description, ascochyta blight

Development of new kabuli large-seeded chickpea materials with resistance to Ascochyta blight

2017 ◽  
Vol 68 (11) ◽  
pp. 967 ◽  
Author(s):  
J. Gil ◽  
P. Castro ◽  
T. Millan ◽  
E. Madrid ◽  
J. Rubio
Keyword(s):  
Seed Size ◽  
Mediterranean Basin ◽  
Consumer Preferences ◽  
Ascochyta Blight ◽  
Ascochyta Rabiei ◽  
Key Factors ◽  
Cicer Arietinum L ◽  
Large Seed ◽  
Serious Disease ◽  
The Mediterranean Basin

Appearance and size of chickpea (Cicer arietinum L.) seeds are key factors for the market in the Mediterranean Basin driven by consumer preferences. Hence, kabuli large seeds are sold on the market at higher price than the desi seeds. In this crop, Ascochyta blight (caused by Ascochyta rabiei (Pass.) Lab.) is a serious disease causing major losses in yield. Thus, developing large-seeded kabuli cultivars resistant to blight would be of great importance to farmers. In this study, the use of transgressive inheritance to select new allelic combinations for seed size was applied to develop new chickpea materials with large seeds and resistance to blight. Crosses between five different advanced lines of kabuli chickpea genotypes with medium–large seed size and resistant to blight were performed. As a results of the selections carried out during 10 successive years, 11 F5:9 lines resistant to blight and with large seed size were selected to be released as future varieties. The markers SCY17590 and CaETR were employed to confirm blight resistance of the material developed.

The effect of carrier volume on ascochyta blight (Ascochyta rabiei) control in chickpea

2008 ◽  
Vol 27 (6) ◽  
pp. 1020-1030 ◽  
Author(s):  
C. Armstrong-Cho ◽  
T. Wolf ◽  
G. Chongo ◽  
Y. Gan ◽  
T. Hogg ◽  
...  
Keyword(s):  
Ascochyta Blight ◽  
Ascochyta Rabiei ◽  
Carrier Volume

Ascochyta blight: isolation, characterization, and development of a rapid method to detect inhibitors of the chickpea fungal pathogen Ascochyta rabiei

2016 ◽  
Vol 120 (3) ◽  
pp. 424-432 ◽  
Author(s):  
Luciana Bahr ◽  
María Victoria Castelli ◽  
Melisa Isabel Barolo ◽  
Nathalie Ruiz Mostacero ◽  
María Elena Tosello ◽  
...  
Keyword(s):  
Rapid Method ◽  
Fungal Pathogen ◽  
Ascochyta Blight ◽  
Ascochyta Rabiei
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