Screening techniques and sources of resistance to nematodes in cool season food legumes

Identification of sources of resistance in cool season legumes to cyst (Heterodera spp.), root-knot (Meloidogyne spp.), and stem nematode (Ditylenchus dipsaci) is generally based on number of cysts on roots, root-knot nematode induced gall index, and stem nematode reproduction in shoot tissue, respectively . Various levels of resistance to cyst nematodes have been detected in chickpea and pea. Resistance has also been identified in chickpea, faba bean, and pea to the root-knot nematodes . Broad based durable sources of resistance to plant parasitic nematodes are required . Basic research is needed to develop transgenic plants with resistance based on hatch stimulants, inhibitors, toxins, or repellents found in antagonistic rhizosphere microorganisms . Selection of genotypes that favor development of beneficial rhizosphere microorganisms or root endophytes that increase the plant resistance to nematode infection deserves attentio