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POWR1 is a domestication gene pleiotropically regulating seed quality and yield in soybean
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POWR1 is a domestication gene pleiotropically regulating seed quality and yield in soybean
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Journal Article
POWR1 is a domestication gene pleiotropically regulating seed quality and yield in soybean
2022
Overview
Seed protein, oil content and yield are highly correlated agronomically important traits that essentially account for the economic value of soybean. The underlying molecular mechanisms and selection of these correlated seed traits during soybean domestication are, however, less known. Here, we demonstrate that a CCT gene,
POWR1
, underlies a large-effect protein/oil QTL. A causative TE insertion truncates its CCT domain and substantially increases seed oil content, weight, and yield while decreasing protein content.
POWR1
pleiotropically controls these traits likely through regulating seed nutrient transport and lipid metabolism genes.
POWR1
is also a domestication gene. We hypothesize that the TE insertion allele is exclusively fixed in cultivated soybean due to selection for larger seeds during domestication, which significantly contributes to shaping soybean with increased yield/seed weight/oil but reduced protein content. This study provides insights into soybean domestication and is significant in improving seed quality and yield in soybean and other crop species.
In soybean production, level of seed protein frequently shows a negative correlation with seed oil content and yield. Here, the authors report a
CCT
gene pleiotropically regulates these traits and the selection of larger seeds determining allele leads to higher oil content but lower protein content in soybean cultivars.
