The tomato genome sequence provides insights into fleshy fruit evolution
Последовательность генома томата позволяет глубже понять эволюцию мясистых плодов
2012-05-01
SCID: 54.1/5q5k6qvv
Discuss with AI
Solanum pimpinellifoliumcomparative genomicsfleshy fruit evolutiongenome triplicationtomato genome sequence
Figures from the paper
Abstract (AI)
This paper reports the genome sequence of domesticated tomato, a major crop plant, and a draft sequence for its closest wild relative; comparative genomics reveal very little divergence between the two genomes but some important differences with the potato genome, another important food crop in the genus Solanum. Tomato (Solanum lycopersicum) is a major crop plant and a model system for fruit development. Solanum is one of the largest angiosperm genera1 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 pimpinellifolium2, 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.
Key Findings
1
A high-quality genome sequence of domesticated tomato and a draft genome of its closest wild relative, Solanum pimpinellifolium, were generated.
2
The two tomato genomes exhibit only 0.6% nucleotide divergence and evidence of recent admixture, indicating very close genetic similarity.
3
Tomato genomes diverge by more than 8% from potato and differ through nine large and several smaller chromosomal inversions.
4
Two successive genome triplications in the Solanum lineage likely enabled neofunctionalization of genes controlling fruit traits such as colour and fleshiness.
5
Unlike Arabidopsis but like soybean, tomato and potato small RNAs predominantly map to gene-rich regions, including gene promoters.
Research Object
The domesticated tomato genome, its closest wild relative Solanum pimpinellifolium genome, and the potato genome
Research Subject
Comparative genomic evolution of the Solanum lineage, including genome divergence, chromosomal inversions, small-RNA distribution, genome triplications, and neofunctionalization of fruit-trait genes
Publication Details
Publication Date
2012-05-01
Journal
Publisher
ISSN
Open access PDF
Access Type
Author Information
Download PDF
Subscribe to digest