A Sequential Screening Scheme for Selection of Vegetable-Type (Edamame) Soybean: Characterization of Bold-Seeded AVRDC Accessions for Pod, Seed, And Sensory Traits at R6 Stage · Soybean Research
A Sequential Screening Scheme for Selection of Vegetable-Type (Edamame) Soybean: Characterization of Bold-Seeded AVRDC Accessions for Pod, Seed, And Sensory Traits at R6 Stage
Neha Pandey, Sanjay Gupta, Vangala Rajesh, T. Onkarappa, V. S. Bhatia
Bold-seeded vegetable-type soybean accessions from AVRDC, Taiwan were characterized at R6 stage (kharif 2018-19; field evaluation at UAS, Bengaluru and laboratory analyses at ICAR-IISR, Indore) for pod, seed, biochemical and sensory traits to derive a practical selection scheme for Indian edamame breeding. Wide variability was recorded (100-pod weight 100-516 g; 100-seed fresh weight 18.1-141 g; TSS 4.0-7.8 °Brix). Principal component analysis (52 accessions) showed pod-and-seed boldness as the dominant axis (44.2% of variation), independent of sweetness. 100-pod weight predicted 100-seed weight (R² = 0.53), and the non-destructive criterion of 100-pod weight ≥ 300 g with pod length ≥ 5 cm classified bold-seeded lines with 83 per cent accuracy. A four-stage sequential scheme (visual → pod boldness → TSS ≥ 6 °Brix → sensory panel) narrowed 116 accessions to five candidates (EC 916036, EC 916033, EC 915907, EC 916037, EC 916039) recommended for replicated evaluation and hybridization.
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