Accumulation, functional annotation, and comparative analysis of expressed sequence tags in eggplant ( Solanum melongena L.), the third pole of the genus Solanum species after tomato and potato

Eggplant ( Solanum melongena L.) is a widely grown vegetable crop that belongs to the genus Solanum, which is comprised of more than 1000 species of wide genetic and phenotypic variation. Unlike tomato and potato, Solanum crops that belong to subgenus Potatoe and have been targets for comprehensive...

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Veröffentlicht in:Gene 2010, Vol.450 (1), p.76-84
Hauptverfasser: Fukuoka, Hiroyuki, Yamaguchi, Hirotaka, Nunome, Tsukasa, Negoro, Satomi, Miyatake, Koji, Ohyama, Akio
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container_title Gene
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creator Fukuoka, Hiroyuki
Yamaguchi, Hirotaka
Nunome, Tsukasa
Negoro, Satomi
Miyatake, Koji
Ohyama, Akio
description Eggplant ( Solanum melongena L.) is a widely grown vegetable crop that belongs to the genus Solanum, which is comprised of more than 1000 species of wide genetic and phenotypic variation. Unlike tomato and potato, Solanum crops that belong to subgenus Potatoe and have been targets for comprehensive genomic studies, eggplant is endemic to the Old World and belongs to a different subgenus, Leptostemonum, and therefore, would be a unique member for comparative molecular biology in Solanum. In this study, more than 60,000 eggplant cDNA clones from various tissues and treatments were sequenced from both the 5′- and 3′-ends, and a unigene set consisting of 16,245 unique sequences was constructed. Functional annotations based on sequence similarity to known plant reference datasets revealed a distribution of functional categories almost similar to that of tomato, while 1316 unigenes were suggested to be eggplant-specific. Sequence-based comparative analysis using putative orthologous gene groups setup by reciprocal sequence comparison among six solanaceous species suggested that eggplant and its wild ally Solanum torvum were clustered separately from subgenus Potatoe species, and then, all Solanum species were clustered separately from the genus Capsicum. Microsatellite motif distribution was different among species and likely to be coincident with the phylogenetic relationships. Furthermore, the eggplant unigene dataset exhibited its utility in transcriptome analysis by the SAGE strategy where a considerable number of short tag sequences of interest were successfully assigned to unigenes and their functional annotations. The eggplant ESTs and 16k unigene set developed in this study would be a useful resource not only for molecular genetics and breeding in eggplant itself, but for expanding the scope of comparative biology in Solanum species.
doi_str_mv 10.1016/j.gene.2009.10.006
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Sequence-based comparative analysis using putative orthologous gene groups setup by reciprocal sequence comparison among six solanaceous species suggested that eggplant and its wild ally Solanum torvum were clustered separately from subgenus Potatoe species, and then, all Solanum species were clustered separately from the genus Capsicum. Microsatellite motif distribution was different among species and likely to be coincident with the phylogenetic relationships. Furthermore, the eggplant unigene dataset exhibited its utility in transcriptome analysis by the SAGE strategy where a considerable number of short tag sequences of interest were successfully assigned to unigenes and their functional annotations. 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subjects EST
Expressed Sequence Tags
Gene Expression Profiling
Gene Expression Regulation, Plant
Lycopersicon esculentum - classification
Lycopersicon esculentum - genetics
Phylogeny
Solanaceae
Solanum melongena - classification
Solanum melongena - genetics
Solanum tuberosum - genetics
Transcriptome
Unigene
title Accumulation, functional annotation, and comparative analysis of expressed sequence tags in eggplant ( Solanum melongena L.), the third pole of the genus Solanum species after tomato and potato
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