AbstractA mungbean (V. radiata) line (BC3F3generation) which is resistant to two species of bruchid beetles (Callosobruchus chinensisandC. maculatus) was successfully developed in Thailand using a wild mungbean variety (V. radiatavar.sublobata). One accession (TC1966) of wild mungbean was found to be completely resistant toC. chinensisandC. maculatusoccurring at Chainat Field Crops Research Center in Thailand. The resistance was controlled by a single dominant gene (R). A breeding program to develop a bruchid‐resistant mungbean cultivar with good agronomic characters under the environmental conditions of Thailand was initiated in 1987.‘Chainat 60’ (‘CN60’), a recommended mungbean cultivar in Thailand, was crossed with TC1966 to incorporate the resistance gene. Agronomic characters of the hybrids were improved by recurrent backcrossing using ‘CN60’ as a pollen parent. Seed yield per plant, days to flowering, and seed size of the bruchid‐resistant BC3F2population reached the level of ‘CN60’ after three consecutive backcrossings. Bruchid‐resistant line (BC3F3,R/R) was selected from i
展开▼
