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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

Published 9/17/2026

PDF4.8 MB

Abstract

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.

Keywords

Vegetable soybeanedamameGlycine maxsequential screeningprincipal component analysissensory evaluation

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