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

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Transgenic soybean with altered gmmYB331 shows increased seed size, indicating its role in oil accumulation and plant architecture.

Transgenic soybean with altered GmMYB331 exhibited increased seed size and oil accumulation, revealing its regulatory role.
These plants showed enhanced seed weight but reduced yield per plant, suggesting a trade-off effect of GmMYB331 expression levels.
Observational analysis through RNA-seq and gene co-expression network identified GmMYB331 as a crucial transcription factor.
Manipulation of GmMYB331 could facilitate breeding efforts for improving high-oil and high-yield soybean cultivars.

Wang et al. (2025) studied this question.

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