Assessment of Photoperiod Sensitivity and the Effect of Sowing Date on Dry-Season Sorghum Cultivars in Southern Chad

The cultivation of dry-season sorghum on residual moisture in West and Central Africa is highly affected by sowing dates ecotypes used. Fifty-five collected from three zones southern Chadian were sown two dates, early late, 2013 2014, an α-Lattice, replicated five times to evaluate the effect date potential yield, flowering time, other agro-morphological traits determine their photoperiod sensitivity. Trials conducted research fields at Agricultural Research Extension Farm Youé, Chad. Year, date, interaction significantly most assessed traits. Delaying decreased duration vegetative phase, traits, except staygreen. All cultivars photoperiodic with late requiring a lower cumulative growing degree unit flower. window was not across cultivars; however, time decrease daylength, but low night temperatures. Generally, yield cultivars. However, this varied region origin, seven having average yields or above regional 1 t/ha, irrespective year dates.