Bornali Saha and Md. Matiul Islam
Khulna University, Khulna 9208, Bangladesh
Saha, Bornali & Matiul Islam, Md. (2022). Assessment of yield performance and related attributes of selected soybean (Glycine max L. Merrill) genotypes in southwest coastal region of Bangladesh. Bulg. J. Agric. Sci., 28 (1), 76–88
The experiment was conducted at the Agronomy Laboratory and Field Laboratory of Agrotechnology Discipline, Khulna University, Khulna, during the period of February to May 2021 under the agro-ecological zone: AEZ-13 (Ganges Tidal Flood Plain). Ten soybean genotypes (varieties) have been released in Bangladesh viz. BD-4, Sohag, BARI Soybean-5; BARI Soybean-6, BINA Soybean-1, BINA Soybean-2, BINA Soybean-3, BINA Soybean-4, BINA Soybean-5 and BINA Soybean-6. All of them were selected for the study. The Agronomy laboratory experiment was carried out to evaluate the performance of selected soybean varieties under 5 different salinity treatments (0 dS m-1, 2 dS m-1, 4 dS m-1, 8 dS m-1 and 16 dS m-1) with 3 replications. In laboratory experiment, conducted following Completely Randomized Design (CRD), BINA Soybean-6 showed highest germination rate (100%), longest root length (19.12±0.91 cm) and highest number of lateral roots per seedling (10.53±0.35), while BINA Soybean-2 produced maximum fresh weight (0.53±0.05 g) and dry weight (in 0 dS m-1, 2 dS m-1 and 4 dS m-1 treatments) per seedling. The field experiment was laid out in a simple randomized design. Each plot size was (3×2.5) m2. Significant variation was found among the varieties in respect of observed parameters. BARI Soybean-6 showed the tallest plant height (50.2±1.44 cm) and highest number of nodes (11.8±0.33) per plant while BINA Soybean-3 produced highest number of leaves per plant (22.9±1.02). Highest pod-shell weight (10.09±0.86 g) was recorded in BINA Soybean-5. BINA Soybean-5 also produced highest number of pods (64.1) and seeds (146.4) per plant while the maximum stem dry weight (8.46±1.05 g) was recorded in BINA Soybean-4. The highest number of branches per plant (4.6) and highest 100-seed weight (13.15 g) was recorded in BINA Soybean-2. Highest seed yield per plant was observed in BINA Soybean-5 (14.302 g) followed by BINA Soybean-2 (14.225 g) while BINA Soybean-6 produced the lowest seed yield (8.495 g) and showed inferior yield attributes. BD-4 was the early matured variety and required 101 days to attain maturity while BINA Soybean-2 and BINA Soybean-5 required 106 days to mature fully. Among the selected ten varieties, BINA Soybean-2 and BINA Soybean-5 showed superior performances than other varieties. Moreover, BINA Soybean-2 performed comparatively better than BINA Soybean-5 under different levels of salinity stresses. Hence, BINA Soybean-2 was the most appropriate genotype for better yield and other performances in the salinity affected southwest coastal region of Bangladesh.