scholarly journals Sources of resistance to ascochyta blight in wild Cicer species

1993 ◽  
Vol 99 (3) ◽  
pp. 163-167 ◽  
Author(s):  
K. B. Singh ◽  
M. V. Reddy
Keyword(s):  
Ascochyta Blight ◽  
Sources Of Resistance ◽  
Cicer Species ◽  
Wild Cicer Species

Resistance to Ascochyta rabiei (Pass.) Lab. in a wild Cicer germplasm collection

2005 ◽  
Vol 45 (10) ◽  
pp. 1291 ◽  
Author(s):  
T. T. Nguyen ◽  
P. W. J. Taylor ◽  
R. J. Redden ◽  
R. Ford
Keyword(s):  
Ascochyta Blight ◽  
Low Frequency ◽  
Germplasm Collection ◽  
Resistance Breeding ◽  
Ascochyta Rabiei ◽  
Australian Isolate ◽  
Sources Of Resistance ◽  
Germplasm Collections ◽  
Cicer Species ◽  
Resistant Accession

Cultivated chickpea germplasm collections contain a low frequency of ascochyta blight resistant accessions. This might lead to limitations on the future progress of chickpea breeding worldwide. In an effort to identify novel sources of resistance to ascochyta blight, 56 unique accessions, comprising 8 annual wild Cicer species, were evaluated under a controlled environment that was optimal for infection with an aggressive Australian isolate of Ascochyta rabiei (Pass.) Labrousse. The majority of wild Cicer accessions were either susceptible or highly susceptible to A. rabiei 21 days after inoculation; however, 11 accessions, of which 7 were Cicer judaicum, were resistant. The most resistant accession detected in this study, ATC 46934, together with accessions ATC 46892 and ATC 46935, which were resistant in this and another study, should be targeted for use in future interspecific resistance breeding programs.

Diallel analyses reveal the genetic control of resistance to ascochyta blight in diverse chickpea and wild Cicer species

Euphytica ◽  
2006 ◽  
Vol 154 (1-2) ◽  
pp. 195-205 ◽  
Author(s):  
N. Danehloueipour ◽  
G. Yan ◽  
H. J. Clarke ◽  
K. H. M. Siddique
Keyword(s):  
Genetic Control ◽  
Ascochyta Blight ◽  
Cicer Species ◽  
Wild Cicer Species

Sources of resistance to cyst nematode in cultivated and wild Cicer species

1996 ◽  
Vol 43 (2) ◽  
pp. 103-107 ◽  
Author(s):  
M. Di Vito ◽  
K. B. Singh ◽  
N. Greco ◽  
M. C. Saxena
Keyword(s):  
Cyst Nematode ◽  
Sources Of Resistance ◽  
Cicer Species ◽  
Wild Cicer Species

Utilisation of wild Cicer in chickpea improvement — progress, constraints, and prospects

2003 ◽  
Vol 54 (5) ◽  
pp. 429 ◽  
Author(s):  
J. S. Croser ◽  
F. Ahmad ◽  
H. J. Clarke ◽  
K. H. M. Siddique
Keyword(s):  
Genetic Diversity ◽  
Genetic Relationships ◽  
Morphological Characteristics ◽  
Biotic Stresses ◽  
Yield And Quality ◽  
Cicer Species ◽  
Cultivated Species ◽  
Wild Cicer Species ◽  
Improvement Programs ◽  
Primary Focus

Efforts to improve the yield and quality of cultivated chickpea (Cicer arietinum L.) are constrained by a low level of intraspecific genetic diversity. Increased genetic diversity can be achieved via the hybridisation of the cultivated species with the unimproved 'wild' relatives from within the 43 species of the Cicer genus. To date, the 8 species sharing an annual growth habit and chromosome number with C. arietinum have been the primary focus of screening and introgression efforts. Screening of these species has uncovered morphological characteristics and resistance to a number of abiotic and biotic stresses that are of potential value to chickpea improvement programs. Detailed analysis of protein and DNA, karyotyping, and crossability studies have begun to elucidate the relationships between the annual Cicer species. In comparison, perennial species have received little attention due to difficulties in collection, propagation, and evaluation. This review discusses the progress towards an understanding of genetic relationships between the Cicer species, and the introgression of genes from the wild Cicer species into the cultivated species.

scholarly journals Identification and Validation of Reference Genes and Their Impact on Normalized Gene Expression Studies across Cultivated and Wild Cicer Species

PLoS ONE ◽  
2016 ◽  
Vol 11 (2) ◽  
pp. e0148451 ◽  
Author(s):  
Dumbala Srinivas Reddy ◽  
Pooja Bhatnagar-Mathur ◽  
Palakolanu Sudhakar Reddy ◽  
Katamreddy Sri Cindhuri ◽  
Adusumalli Sivaji Ganesh ◽  
...  
Keyword(s):  
Gene Expression ◽  
Reference Genes ◽  
Expression Studies ◽  
Cicer Species ◽  
Wild Cicer Species ◽  
Gene Expression Studies

The epidemiology and control of ascochyta blight in field peas: a review

2006 ◽  
Vol 57 (8) ◽  
pp. 883 ◽  
Author(s):  
T. W. Bretag ◽  
P. J. Keane ◽  
T. V. Price
Keyword(s):  
Current Knowledge ◽  
Ascochyta Blight ◽  
Mycosphaerella Pinodes ◽  
Sources Of Resistance ◽  
New Crops ◽  
Field Peas ◽  
Ascochyta Pisi ◽  
Almost All ◽  
The Cost ◽  
And Control

Ascochyta blight is one of the most important diseases affecting field peas. The disease occurs in almost all pea-growing regions of the world and can cause significant crop losses when conditions are favourable for an epidemic. Here we review current knowledge of the epidemiology of the disease. Details are provided of disease symptoms, the disease cycle and the taxonomy of the causal fungi, Ascochyta pisi, Mycosphaerella pinodes and Phoma pinodella. The importance of seed-, soil- and air-borne inoculum is discussed along with the factors that influence survival of the causal fungi in soil, on seed or associated with pea trash. Many studies have been reviewed to establish how the fungi responsible for the disease survives from year to year, how the disease becomes established in new crops and the conditions that favour disease development. Evidence is provided that crop rotation, destruction of infected pea trash and chemical seed treatments can significantly reduce the amount of primary inoculum. Later sowing of crops has been shown to reduce the incidence and severity of disease. Fungicides have been used successfully to control the disease, although the cost of their application can significantly reduce the profitability of the crop. The best long-term strategy for effective disease control appears to be the development of ascochyta blight resistant pea varieties. Reports of physiological specialisation in ascochyta blight fungi are also documented. Despite extensive screening of germplasm, relatively few sources of resistance to ascochyta blight fungi have been found in Pisum sativum. However, the discovery of much better sources of resistance in closely related species and the development of advanced breeding methods offer new possibilities for developing useful resistance.

Resistance to Phytophthora medicaginis Hansen and Maxwell in wild Cicer species and its use in breeding root rot resistant chickpea (Cicer arietinum L.)

2008 ◽  
Vol 59 (4) ◽  
pp. 383 ◽  
Author(s):  
E. J. Knights ◽  
R. J. Southwell ◽  
M. W. Schwinghamer ◽  
S. Harden
Keyword(s):  
Field Experiment ◽  
Root Rot ◽  
Partial Resistance ◽  
The Other ◽  
Phytophthora Root Rot ◽  
Cicer Arietinum L ◽  
Cicer Species ◽  
Wild Cicer Species ◽  
Moderately Resistant ◽  
Chickpea Cultivars

Phytophthora root rot caused by Phytophthora medicaginis is a major disease of chickpea in Australia. Only partial resistance, derived from chickpea, is available in Australian cultivars. Five wild Cicer species were compared with chickpea cv. Jimbour (moderately resistant) in a field experiment. The proportions of accessions with significantly lower (P < 0.05) disease scores, where lower scores equate to higher resistance, were 9/9 for C. echinospermum, 9/21 for C. bijugum, 1/4 for C. judaicum, 1/29 for C. reticulatum, and 0/3 for C. pinnatifidum. The resistance of C. echinospermum (7/7 accessions) but not the other Cicer species was reproduced in a greenhouse test. Nine out of 30 chickpea × C. echinospermum-derived lines were as resistant as the C. echinospermum parents in a separate greenhouse experiment. C. echinospermum appears to be the best of the sources we examined for breeding chickpea cultivars resistant to P. medicaginis.

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.

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