Abstract

                                Fortnightly sowings carried out for one year with the parental lines of sorghum hybrids, CSH 5, CSH 6. CSH 9 and CO H 2 revealed the wide differences in the duration to flowering among the parental lines due to sowing dates. For achieving simultaneous flowering, the male lines of hybrids CSH 5, CSH 6 and CSH 9 should be sowm simultaneously, 12 to 19 days and four to seven days earlier than the respective female lines in the monsoon season in the winter season, the male lines of CSH 5, CSH 6, CSH 9 and CO H 2 should be sown seven to ten days later, three days earlier, five to seven days later and three to five days later than the respec- tive female lines. Co H 2 seed production should not be undertaken during monsoon season since the interval in the flowering of the parental lines was too wide to effect pollination.

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