Seed oil is a momentous agronomical trait of soybean () targeted by domestication in breeding. Although multiple oil-related genes have been uncovered, knowledge of the regulatory mechanism of seed oil biosynthesis is currently limited. We demonstrate that the seed-preferred gene , encoding a tandem CCCH zinc finger protein, is selected during domestication. Further analysis shows that facilitates oil accumulation by directly activating , , , , and in transgenic Arabidopsis () seeds. Overexpression of in transgenic soybean also activates lipid biosynthesis genes, thereby accelerating seed oil accumulation. The haplotype from the cultivated soybean group and the wild soybean () subgroup III correlates well with high gene expression level, seed oil contents and promoter activity, suggesting that selection of expression leads to increased seed oil content in cultivated soybean. Our study provides novel insights into the regulatory mechanism for seed oil accumulation, and the manipulation of may have great potential in the improvement of oil production in soybean and other related crops.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5373050 | PMC |
| http://dx.doi.org/10.1104/pp.16.01610 | DOI Listing |
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