A single-MYB transcription factor GmMYB331 regulates seed oil accumulation and seed size/weight in soybean.

ABSTRACT: Seed oil accumulation is an important process affecting seed quality, and regulatory factors modulating this process remain less understood, especially in soybean. In this study, through RNA-seq and gene co-expression network analysis, we identified a single MYB (Myeloblastosis)-type transcription factor GmMYB331, which promotes seed oil accumulation in soybean seeds and enhances seed size/weight as well. Transgenic soybean plants with mild GmMYB331 overexpression showed higher total fatty acid contents in seeds and higher seed yield per plant compared to the control plants. In contrast, transgenic soybean plants with strong GmMYB331 overexpression showed only increased seed size/weight but much reduced seed yield per plant, along with an altered plant architecture. Knocking out GmMYB331 b

SUBMITTER: Wang ZY 

PROVIDER: S-EPMC12863025 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature