Development of the high yielding and disease resistant mungbean variety, BINAMOOG-2, using nuclear and cross-breeding techniques

Mungbean yellow mosaic virus (MYMV) causes up to 40% losses in yield in mungbean (Vigna radiata L. (Wilczek)). Seeds of the mungbean accession No. MB-55 were irradiated with doses of 500-900 Gy of gamma rays, and a mutant (MB-55(4)) with tolerance to MYMV was isolated. The mutant could not be grown during the summer because of its photosensitive character. This mutant was crossed with a summer adaptive, but MYMV susceptible, AVRDC line, V-2273. One promising hybrid line, MC-246, four exotic summer lines and one parent variety were subjected to preliminary yield trials along with two controls (MB-87, collected from Bhola Island, and Mubarik, a released variety). The other parent (MB-55(4)) is a photosensitive line which does not flower in the summer season and hence was not included in the trials. On the basis of performance, MC-246 and two other elite genotypes (V-2272 and MB-8) were selected. In all the zonal yield trials at five locations in 1990 and three locations in 1991, the strain MC-246 showed superior yield performance. Similarly, MC-246 retained its superiority over the released variety, Kanti, in yield performance tests conducted in farmers' fields at seven locations. In addition, MC-246 showed a resistant reaction to MYMV when tested with other lines. This line was released in 1994 and was named BINAMOOG-2. 2 refs, 4 tabs