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• W4294190623 endingPage "100427" @default.
• W4294190623 startingPage "100427" @default.
• W4294190623 abstract "Pseudogenes are important resources for investigation of genome evolution and genomic diversity because they are nonfunctional but have regulatory effects that influence plant adaptation and diversification. However, few systematic comparative analyses of pseudogenes in closely related species have been conducted. Here, we present a turnip (Brassica rapa ssp. rapa) genome sequence and characterize pseudogenes among diploid Brassica species/subspecies. The results revealed that the number of pseudogenes was greatest in Brassica oleracea (CC genome), followed by B. rapa (AA genome) and then Brassica nigra (BB genome), implying that pseudogene differences emerged after species differentiation. In Brassica AA genomes, pseudogenes were distributed asymmetrically on chromosomes because of numerous chromosomal insertions/rearrangements, which contributed to the diversity among subspecies. Pseudogene differences among subspecies were reflected in the flavor-related glucosinolate (GSL) pathway. Specifically, turnip had the highest content of pungent substances, probably because of expansion of the methylthioalkylmalate synthase-encoding gene family in turnips; these genes were converted into pseudogenes in B. rapa ssp. pekinensis (Chiifu). RNA interference-based silencing of the gene encoding 2-oxoglutarate-dependent dioxygenase 2, which is also associated with flavor and anticancer substances in the GSL pathway, resulted in increased abundance of anticancer compounds and decreased pungency of turnip and Chiifu. These findings revealed that pseudogene differences between turnip and Chiifu influenced the evolution of flavor-associated GSL metabolism-related genes, ultimately resulting in the different flavors of turnip and Chiifu." @default.
• W4294190623 created "2022-09-02" @default.
• W4294190623 creator A5011875487 @default.
• W4294190623 creator A5015443493 @default.
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• W4294190623 creator A5035850513 @default.
• W4294190623 creator A5040206500 @default.
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• W4294190623 creator A5070818958 @default.
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• W4294190623 creator A5083409684 @default.
• W4294190623 creator A5086881242 @default.
• W4294190623 creator A5089418255 @default.
• W4294190623 date "2023-01-01" @default.
• W4294190623 modified "2023-10-07" @default.
• W4294190623 title "Differences in pseudogene evolution contributed to the contrasting flavors of turnip and Chiifu, two Brassica rapa subspecies" @default.
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