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  The orange subfamily (Aurantioideaeï¼ co
ntains several Citrus species cultivated worldwide, such as sweet orange and lemon. The origin of Citrus species has long been debated and less is known a
bout the Aurantioideae. Here, we compiled the genome sequences of 314 accessions, de novo assembled the genomes of 12 species and co
nstructed a graph-ba
sed pangenome for Aurantioideae. Our analysis indicates that the ancient Indian Plate is the ancestral area for Citrus-related genera and that South Central China is the primary center of origin of the Citrus genus. We found substantial variations in the sequence and ex
pression of the PH4 gene in Citrus relative to Citrus-related genera. Gene editing and biochemical experiments demo
nstrate a central role for PH4 in the accumulation of citric acid in citrus fruits. This study provides insights into the origin and evolution of the orange subfamily and a regulatory mechanism underpinning the evolution of fruit taste.
日期9üa href="//www.sqrdapp.com/news/2023-10-08.html">2023-10-08
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