The tomato genome sequence provides insights into fleshy fruit evolution

TitleThe tomato genome sequence provides insights into fleshy fruit evolution
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2012
AuthorsSato, S., Tabata S., Hirakawa H., Asamizu E., Shirasawa K., Isobe S., Kaneko T., Nakamura Y., Shibata D., Aoki K., et al.
KeywordsArabidopsis, article, color, DNA, DNA sequence, Evolution, fruit, fruit (structure), fruit color, fruit flesh, gene sequence, genetic parameters, Genetic variability, Genetic Variation, genetics, Genome, genome triplication, Genomics, Lycopersicon esculentum, Molecular, molecular evolution, molecular genetics, Molecular Sequence Data, nonhuman, nucleotide, Phylogeny, physiology, Plant, plant evolution, plant genetics, plant genome, plant RNA, potato, priority journal, promoter region, qualitative analysis, RNA, RNA analysis, Sequence Analysis, Solanum tuberosum, soybean, Soybeans, synteny, Tomato

Tomato (Solanum lycopersicum) is a major crop plant and a model system for fruit development. Solanum is one of the largest angiosperm genera and includes annual and perennial plants from diverse habitats. Here we present a high-quality genome sequence of domesticated tomato, a draft sequence of its closest wild relative, Solanum pimpinellifolium, and compare them to each other and to the potato genome (Solanum tuberosum). The two tomato genomes show only 0.6% nucleotide divergence and signs of recent admixture, but show more than 8% divergence from potato, with nine large and several smaller inversions. In contrast to Arabidopsis, but similar to soybean, tomato and potato small RNAs map predominantly to gene-rich chromosomal regions, including gene promoters. The Solanum lineage has experienced two consecutive genome triplications: one that is ancient and shared with rosids, and a more recent one. These triplications set the stage for the neofunctionalization of genes controlling fruit characteristics, such as colour and fleshiness. © 2012 Macmillan Publishers Limited.


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