NDLI: Molecular evolution of 35S rDNA and taxonomic status of Lycopersicon within Solanum sect. Petota

Content Provider	Springer Nature Link
Author	Komarova, Nataliya Y. Grimm, Guido W. Hemleben, Vera Volkov, Roman A.
Copyright Year	2008
Abstract	To clarify the taxonomic status of tomatoes (“Lycopersicon”) and their relationship to the members of sect. Petota of genus Solanum L., organization of the rDNA external transcribed spacer (5′ ETS) was studied in 33 Solanum and “Lycopersicon” species. Phylogenetic reconstruction revealed that three major groups can be distinguished. Non-tuber-bearing species of ser. Etuberosa as well as tuber-bearing Central American diploids appeared as a paraphyletic group. The first of two well-defined clades embraced all tuber-bearing South American species and Central American polyploids. The other clade (named “tomato clade”) contains non-tuber-bearing species of ser. Juglandifolia and tomato species of ser. Neolycopersicon, which appears to be imbedded in sect. Petota. The new 5′ ETS variant D characterized by a cluster of downstream subrepeats is characteristic for the tomato clade. The variant D originated directly from the most ancestral variant A found in ser. Etuberosa and the Central American diploids, whereas variants B and C specific for the tuber-bearing South American species and Central American polyploids represent a parallel lineage of molecular evolution. The sequence analysis demonstrates the existence of an evolutionary trend of parallel multiplication of specific motifs in 5′ ETS in different groups of sect. Petota.
Starting Page	59
Ending Page	71
Page Count	13
File Format	PDF
ISSN	03782697
Journal	Plant Systematics and Evolution
Volume Number	276
Issue Number	1-2
e-ISSN	16156110
Language	English
Publisher	Springer Vienna
Publisher Date	2008-09-18
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	External transcribed spacer Networks Phylogeny Potato Repeated sequence elements Tomato Plant Systematics/Taxonomy/Biogeography Plant Anatomy/Development Plant Ecology Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Plant Science Ecology, Evolution, Behavior and Systematics

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