Potential for using morphological, biochemical, and molecular markers for resistance to insect pests in grain legumes uri icon

abstract

  • Grain legumes such as chickpea, pigeon pea, cowpea, field pea, lentil, faba bean, black gram, green gram, grasspea and Phaseolus, have important roles in food and nutritional security, and sustainable crop production. Several insect pests damage these crops, of which gram pod borer (Helicoverpa armigera), spotted pod borer (Maruca vitrata), spiny pod borer (Etiella zinckenella), pod fly (Melanagromyza obtusa), stem fly (Ophiomyia phaseoli), aphids (Aphis craccivora and Aphis fabae), white fly (Bemisia tabaci), defoliators (Spodoptera litura, S. exigua and Amsacta spp.), leafhoppers (Empoasca spp.), thrips (Megalurothrips dorsalis and Caliothrips indicus), blister beetles (Mylabris spp.) and bruchids (Callosobruchus chinensis and Bruchus pisorum), cause extensive losses. Several sources of resistance to insects have been identified in grain legumes, and several morphological and biochemical traits associated with resistance to insects have also been identified. Genetic linkage maps were developed for some of the grain legumes. However, the accuracy and precision of phenotyping for resistance to insect pests remains a critical constraint in many crops. There are very few reports concerning the application of molecular markers for resistance to insect pests in grain legumes. There is a need for precise phenotyping, mapping of QTLs associated with insect resistance, and use them in conjunction with morphological and biochemical markers to develop cultivars with resistance to insect pests

publication date

  • 2008