Pertumbuhan dan hasil genotipe kedelai (Glycine max (L.) Merril) pada tiga tingkat cekaman kekeringan
Growth and yield of soybean (Glycine max (L.) Merril) genotypes at three levels of drought stress
Abstract
Drought stress is a major constraint to the production and yield stability of soybean (Glycine max (L.) Merr). Drought stress at the generative phase had a negative impact on soybean potential yield significantly. This study evaluated variation in five soybean genotypes (G1, G2, G3, G4 and G5) in their response to the three levels (100% of field capacity (D1), 80% from field capacity (D2) and 60% from field capacity (D3)) of drought stress in a glass house. This study was arranged in a factorial randomized completely block design with three replications. Results showed that all five genotypes responded significantly (P<0.05) to the drought stress treatments in soybean yield. The average yield was respectively reduced by 8.4% and 11.6% in the D2 and D3 treatments, respectively, compared to the D1 (control). Percent reduction of yield for genotype G4 (19.8%) was lower compared to other genotypes. This is indicated that genotype G4 tolerance to drought stress. The evaluation on the morphological character was potentially to become a screening tool for soybean breeding program.
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