410份饭豆核心种质的营养成分分析

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Abstract： Rice bean（Vigna umbellata（Thunb.） Ohwi & Ohashi） is an underutilized legume crop with considerable potentialfor nutritional and health-promotingapplications，highlighting its promising prospects for future development. In this study，we quantified four major nutritional components—including protein content， starch content，total flavonoid content（TFC），and total polyphenol content（TPC）—in 410 rice bean core accessions.The protein content ranged from 15.9% to 28.2% （mean： 21.0% ），and starch content varied between 40.0% and 53.7% （mean： 45.8% ）.Meanwhile，TFC and TPC ranged from 1.34-7.39mgRE/g （mean： 4.10mg （204 RE/g and 0.80-2.90logGAE/g （mean： 2.19mgGAE/gΩ ，respectively.Based on these results，34 representative accessions were selected for comprehensive untargeted metabolite profiling analysis，which identified 607 metabolites in12 major categories.Variations in key metabolite classes—such as flavonoids，amino acids and derivatives，alkaloids，and terpenoids—were observed among accessions from diferent geographic origins. Specifically，accessions from China and Myanmar exhibited the higher flavonoid abundance （ 19.0% and 19.7% ， respectively），while those from Thailand and Laos showed higher levels ofamino acids and derivatives （ 20.1% and 18.3% ，respectively）.This study provides a valuable dataset to support the evaluation，exploration，and breeding-oriented utilization of high-quality rice bean germplasm resources.

Key words： rice bean;germplasm resources;nutritional composition;metabolites

饭豆［Vignaumbellata（Thunb.）Ohwi&Ohashi又称爬山豆、竹豆或精米豆，是豇豆属的一个重要栽培种[1]。（剩余12469字）