Screening techniques and sources of resistance to foliar diseases caused by fungi and bacteria in cool season food legumes

Abstract

Screening techniques are an important component of the overall strategy of breeding for resistance to diseases in cool season food legumes. Suitable screening methods have been developed for several major foliar diseases of chickpea, pea, faba bean, and lentil, and sources of resistance have been identified. International cooperation plays an important role in promoting research and keeping collections of cultivated species and their wild relatives. New biotechnological approaches are promising for enhancing the practical use of genes for resistance .

Characterization of chickpea differentials for pathogenicity assay of ascochyta blight and identification of chickpea accessions resistant to Didymella rabiei

“…Disease control using host resistance is possible only if the resistance is effective against all pathotypes of the pathogen present in the region of crop cultivation (Porta‐Puglia et al ., 1994). Plant age is known to affect chickpea resistance to ascochyta blight, with older plants being more susceptible than younger plants (Chongo & Gossen, 2001).…”

“…A reliable pathogenicity assay that will facilitate the screening process of breeding materials has recently been developed (Chen & Muehlbauer, 2003). However, in order to maintain an effective and efficient resistance breeding programme, there is a need to understand pathogenic variation in the pathogen population in the production area and to have access to resistance sources that provide better resistance than currently available in commercial cultivars (Porta‐Puglia et al ., 1994).…”

The use of newly isolated Streptomyces strain TN258 as potential biocontrol agent of potato tubers leak caused by Pythium ultimum

“…The supernatant of the TN258 culture inhibited P. ultimum mycelial growth and also exhibited a strong inhibitory activity against P. ultimum oospores germination. Indeed, oospores can persist in soil for years, and upon germination, they lead to hyphae or sporangia development, thus they maintain P. ultimum survival and reproduction . TN258 filtrated supernatant seems to be a potential agent against these P. ultimum resistance forms by its ability to totally inhibit the germination, it can also distort oospores and even explode them.…”

Improved Quality of Lentil Using Molecular Marker Technology

“…Several techniques for screening cool season food legumes for resistance to foliar fungal diseases have previously been reported (Porta-Puglia et al, 1994;Nasir and Bretag, 1997). Although field screening provides an economical method for testing for a reaction to a fungal pathogen and a relatively large number of plants may be tested at once,…”