Agronomic performance of advanced double haploid elite rice(Oryza sativa) lines in Estuaire, Gabon

experiments were conducted during two wet seasons at the Kougouleu. the aim wasto evaluate the performance of advanced lines that were earlier selected through yieldtrials. ten double haploid lines and five high-yielding check varieties were evaluated fortheir adaptability under irrigated growth conditions. a rCBD was used with threereplications. a total of 10 agromorphological traits were collected and analyzed. theanoVa showed significant differences (p < 0.005) between years and genotypes. resultsfound that 30 DaS, the number of tillers showed positive interactions with plant height,grain yield, and harvest index. at 60 DaS, the number of tillers per plant and theharvest index were positively associated with grain yield. Days to 50% heading positivelyinfluenced days to 80% maturity. however, there were negative relationships betweengrain yield and plant height at 30 DaS, 60 DaS, and maturity; the number of tillers at60 DaS and plant height at 30 DaS, 60 DaS, and maturity; and between the numberof tillers at 30 DaS and days at 50% heading, and maturity. Cluster analyses showedtwo groups and promising lines were selected.