EFFECT OF PHYSIOLOGICAL PARAMETERS ON GRAIN YIELD AND YIELD COMPONENTS OF HYBRID MAIZE (ZEA MAYS L.) VARIETIES

This study was carried out in order to determine the effect of some physiological parameters on grain yield and yield components of hybrid maize varieties at the trial site of GAP Agricultural Research Institute in 2018 and 2019 years. Trials were established in a randomized complete block design with three replications. Fifteen medium late maturing hybrid maize varieties were used as metarial. According to the results; Plant Height (PH), Tasseling Time (TT), Grain Moisture (GM), Grain/Cob Rate (GCR), 1000 Grain Weight (GW), Hectoliter (H), Grain Yield (GY), Chlorophyll Content (CC) and Stomatal Conductance (SC) ranged between 201.3-307.5 cm, 50.0-60.7 days, 16.7-28.2%, 76.0-86.0%, 241.6-304.5 g, 54.4-70.7 kg ha-1, 8.3-13.9 t ha-1, 38.5-61.8 spad and 92.7-416.4 H2O m-2 s-1 respectively. Public hybrid maize varieties referred to as PL151-0218, SASA-137 and SASA-133 placed in the same group when compared to the check varieties. It has been determined that public varieties can be recommended for second crop conditions in the GAP region and the grain yield had statistically significant relationships with yield components and physiological parameters except grain moisture in correlation analysis, and important yield parameters of maize varieties can be determined in early growing stages through physiological parameters.