Natural variation and selection in GmSWEET39 affect soybean seed oil content.

08:00 EDT 9th October 2019 | BioPortfolio

Summary of "Natural variation and selection in GmSWEET39 affect soybean seed oil content."

Soybean (Glycine max L. Merrill) is a major contributor to the world oilseed production. Its seed oil content has been increased during soybean domestication and improvement. However, the genes underlying the selection are largely unknown. We analyzed the expression patterns of genes in the seed oil quantitative trait loci with strong selective sweep signals, then used association, functional study and population genetics to reveal a sucrose efflux transporter gene, GmSWEET39, controlling soybean seed oil content and under selection. GmSWEET39 is highly expressed in soybean seeds and encodes a plasma membrane-localized protein. Its expression level is positively correlated with soybean seed oil content. The variation in its promoter and coding sequence leads to different natural alleles of this gene. The GmSWEET39 allelic effects on total oil content were confirmed in the seeds of soybean recombinant inbred lines, transgenic Arabidopsis, and transgenic soybean hairy roots. The frequencies of its superior alleles increased from wild soybean to cultivated soybean, and are much higher in released soybean cultivars. Our findings suggest that the sequence variation in GmSWEET39 affects its relative expression and oil content in soybean seeds, and GmSWEET39 has been selected to increase seed oil content during soybean domestication and improvement.


Journal Details

This article was published in the following journal.

Name: The New phytologist
ISSN: 1469-8137


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The selection or choice of sexual partner in animals. Often this reproductive preference is based on traits in the potential mate, such as coloration, size, or behavioral boldness. If the chosen ones are genetically different from the rejected ones, then NATURAL SELECTION is occurring.

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