--V. K. Chaudhary and J. L. Minocha
Among the eighteen different treatments of EMS, EB and SM given, the
treatment of EMS (0.1%) for 72 hrs at 5±1 C produced two red cob
variants out of a total of 299 plants in M2 generation. This was further
analysed in later generations. After selfing in M2, it was observed as
almost breeding true in M3 and subsequent generations. Out of 500 seeds
sown in the field, 460 surviving plants produced red cob mutants in the
next generation. In the later generations when tested, this mutant bred
true, giving red cob characteristics. The mutant has red cob and the tip
of the grain had a red coloured tinge. There was purple lining at the base
of each floret in its inflorescence. This characteristic of purple lining
at the base of each floret was of use in identifying the plants with the
red cob characteristic quite in advance. Such mutants can be used as genetic
markers in genetic studies. Results indicated that the purple lining at
the base of each floret in the tassel is associated with the red cob colour.
The red cob colour has been earlier reported to be associated with brown
tassel colour (Coe, MNL 57:33-34).
Return to the MNL 63 On-Line Index
Return to the Maize Newsletter Index
Return to the MaizeGDB Homepage