Inter- and intranational spread of ascochyta pathogens of chickpea, faba bean, and lentil

Kaiser, W. J.

doi:10.1080/07060669709500556

Cited by 107 publications

(69 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Significant genetic variation was shown in populations of A. rabiei in Italy (Fischer et al 1995), Tunisia Morjane et al 1994), Syria and Lebanon (Udupa et al 1998), Spain (NavasCortés et al 1998), Pakistan (Jamil et al 2000) and India (Santra et al 2001). In some regions of the world where chickpea has only recently been introduced, for example Australia and California, only modest genetic diversity and a single mating type has been reported (Kaiser 1997;Phan et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity and population structure of Ascochyta rabiei from the western Iranian Ilam and Kermanshah provinces using MAT and SSR markers

et al. 2010

View full text Add to dashboard Cite

Knowledge of genetic diversity in A. rabiei provides different levels of information that are important in the management of crop germplasm resources. Gene flow on a regional level indicates a significant potential risk for the regional spread of novel alleles that might contribute to fungicide resistance or the breakdown of resistance genes. Simple sequence repeat (SSR) and mating type (MAT) markers were used to determine the genetic structure, and estimate genetic diversity and the prevalence of mating types in 103 Ascochyta rabiei isolates from seven counties in the Ilam and Kermanshah provinces of western Iran (Ilam, Aseman abad, Holaylan, Chardavol, Dareh shahr, Gilangharb, and Sarpul). A set of 3 microsatellite primer pairs revealed a total of 75 alleles; the number of alleles varied from 15 to 34 for each marker. A high level of genetic variability was observed among A. rabiei isolates in the region. Genetic diversity was high (He=0.788) within populations with corresponding high average gene flow and low genetic distances between populations. The smallest genetic distance was observed between isolates from Ilam and Chardavol. Both mating types were present in all populations, with the majority of the isolates belonging to Mat1-1 (64%), but within populations the proportions of each mating type were not significantly different from 50%. Results from this study will be useful in breeding for Ascochyta blight-resistant cultivars and developing necessary control measures.

show abstract

Section: Introductionmentioning

confidence: 99%

Genetic diversity and population structure of Ascochyta rabiei from the western Iranian Ilam and Kermanshah provinces using MAT and SSR markers

et al. 2010

View full text Add to dashboard Cite

show abstract

“…In modern agriculture, infected seed is an important agent in the long-distance spread and survival of these pathogens. Seed transmission has been responsible for the introduction and dissemination of the Ascochyta blight pathogen in many countries worldwide (Kaiser 1997). Thus, it is likely that the disease spread via traded seed stocks.…”

Section: Discussionmentioning

confidence: 99%

The Chickpea, Summer Cropping, and a New Model for Pulse Domestication in the Ancient Near East

Abbo¹,

Shtienberg²,

Lichtenzveig

et al. 2003

The Quarterly Review of Biology

View full text Add to dashboard Cite

“…In contrast, all Didymella species are heterothallic with two mating types (Wilson and Kaiser 1995;Kaiser et al 1997;Barve et al 2003;Peever et al 2004) and pseudothecia, if present, develop at the end of the cropping season on dead plants. These sexual fruiting structures permit the fungi to overwinter and are considered to play an important role in generating pathogen variability (Kaiser 1997). Development of the anamorph or teleomorph depends on specific environmental and/or nutritional conditions.…”

Section: Reproductionmentioning

confidence: 99%

Comparison of the epidemiology of ascochyta blights on grain legumes

2007

View full text Add to dashboard Cite

Asochyta blights of grain legumes are caused by fungal pathogens in the genus Ascochyta. Different species infect the different legume species, and in pea three species including Phoma medicaginis var. pinodella have been implicated in ascochyta blight. The impact of the diseases varies between crops, countries, seasons and cropping systems, and yield loss data collected under welldefined conditions is scarce. However, ascochyta blights are considered major diseases in many areas where legumes are grown. Symptoms appear on all aerial parts of the plant, and lesions are similar for most of the species, except for M. pinodes and P. medicaginis var. pinodella. Infected seed, stubble and/or air-borne ascospores are major sources of primary inoculum. Their importance varies between species and also between regions. All Ascochyta spp. produce rain-splashed conidia during the cropping season which are responsible for the spread of the disease within the crop canopy. Only in pea are ascospores involved in secondary disease spread. Limited data suggests that Ascochyta spp. may be hemibiotrophs; however, toxins characteristic for necrotrophs have been isolated from some of the species. Modelling of ascochyta blights is still in the developmental stage and implementation of such models for disease forecasting is the exception.

show abstract

Inter- and intranational spread of ascochyta pathogens of chickpea, faba bean, and lentil

Cited by 107 publications

References 24 publications

Genetic diversity and population structure of Ascochyta rabiei from the western Iranian Ilam and Kermanshah provinces using MAT and SSR markers

Genetic diversity and population structure of Ascochyta rabiei from the western Iranian Ilam and Kermanshah provinces using MAT and SSR markers

The Chickpea, Summer Cropping, and a New Model for Pulse Domestication in the Ancient Near East

Comparison of the epidemiology of ascochyta blights on grain legumes

Contact Info

Product

Resources

About