Abstract
AbstractSitophilus oryzae is one of the most important stored grain pests of maize causing substantial losses. Owing to high cost, environmental and health hazards, chemical control does not provide an acceptable solution. Host plant resistance offers sustainable and cost-effective way to reduce the losses. A set of 162 diverse inbreds were evaluated to assess their responses to infestation of S. oryzae. Significant variation for (1) grain weight loss (GWL) (4.19–42.32%), (2) emergence of insect progeny (5.67–75.67), (3) germination of infested seeds (GIS) (0.00–81.33%), (4) pericarp thickness (PT) of the grain (47.32–194.83 μm) and (5) grain hardness (GH) (113.00–1,171.67 Newton) was observed among inbreds. GWL and emergence of insect progeny were positively correlated, while GIS was negatively correlated with both. PT and GH did not show any association with other characters. CML442 and CM394 earlier reported to be promising against S. zeamais, were also identified as resistant to S. oryzae. SKV21, Pant...
Highlights
Maize serves as a staple food to billions of people in Africa, Meso-America and many Asian countries (Gupta, Hossain, & Muthusamy, 2015)
Genetic materials A total of 162 inbred lines comprising of 46 exotic inbreds and 116 inbreds of indigenous origin were selected to analyse their responses to infestation of S. oryzae
The present study demonstrated the existence of wide genetic variation for grain weight loss (GWL) (4.19–42.32%) and number of insect progeny emerged (NIP) (5.67–75.67) across experiments
Summary
Maize serves as a staple food to billions of people in Africa, Meso-America and many Asian countries (Gupta, Hossain, & Muthusamy, 2015). Together with rice and wheat, maize provides at least 30% of ABOUT THE AUTHORS. ICAR-Indian Agricultural Research Institute, New Delhi is a premier organization for providing food- and nutritional-security in the country. The research team is involved in genetic improvement of maize for diverse biotic stresses. The present report was aimed to identify the potential sources of resistance to Sitophilus oryzae, a major postharvest insect–pest that causes significant loss to maize grains in storage. The study identified promising inbreds that would serve as rich genetic resource in the resistance breeding programme
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