Identification of genomic region associated with rice weevil resistance in sorghum [Sorghum bicolor (L.) Moench] |
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| Affiliation: | 1. Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China;2. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China;3. Department of Forest Protection and Entomology, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences, Kamýcká 1176, CZ-165 21, Prague 6 – Suchdol, Czech Republic;1. National Agricultural Research Institute, PO Box 4627, Asmara, Eritrea;2. Hamelmalo Agricultural College, PO Box 397, Keren, Eritrea;3. African Biodiversity Conservation and Innovations Centre, PO Box 100882-00101, Nairobi, Kenya;4. Monsanto Holland B.V., Bergschenhoek, The Netherlands;5. ICRISAT-Sahelian Center, BP 12404 Niamey, Niger;6. University of Nairobi, PO Box 39063-00623, Nairobi, Kenya;7. Association for Strengthening Agricultural Research in Eastern and Central Africa, PO Box 765, Entebbe, Uganda;8. International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), PO Box 39063-00623, Nairobi, Kenya;9. Pwani University, PO Box 195-80108, Kilifi, Kenya;1. Jimma University College of Agriculture and Veterinary Medicine, P. O. Box 307, Jimma, Ethiopia;2. International Center of Insect Physiology & Ecology (ICIPE), 30772-00100, Nairobi, Kenya;3. International Institute of Tropical Agriculture Plot No. 25, Mikocheni Light Industrial Area Mwenge, Coca Cola Road, Mikocheni B, 34441, Dar es Salaam, Tanzania;4. International Centre of Insect Physiology and Ecology, ILRI Campus, Gurd Shola, 5689, Addis Ababa, Ethiopia |
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| Abstract: | The rice weevil Sitophilus oryzae (L.) is an important pest of stored sorghum (Sorghum bicolor L. Moench). Quantitative trait loci (QTL) associated with rice weevil resistance was analyzed using a F10 recombinant inbred line (RIL) population derived from the cross 654 (susceptible) × LTR108 (resistant). Grain weight losses (GWL), flour production (FP), and percentage kernels damaged (PKD) were evaluated across two trails. A total of 21 QTLs for GWL, FP, and PKD were identified. The phenotypic variation explained by individual QTL varied from 4.14% to 15.51%. Both parents contributed resistance alleles. Several main effect QTLs affecting GWL, FP, and PKD were mapped to the same regions on chromosome 2. The identification of genomic regions associated with rice weevil resistance will be useful to understand the resistance mechanism and improve rice weevil resistance of sorghum by marker-aided approaches. |
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| Keywords: | Quantitative trait loci Rice weevil resistance Sorghum |
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