NDLI: Concerted evolution of satellite DNA in Sarcocapnos: a matter of time

Content Provider	Springer Nature Link
Author	Pérez Gutiérrez, Miguel A. Suárez Santiago, Víctor N. López Flores, Inmaculada Romero, Ana Teresa Garrido Ramos, Manuel A.
Copyright Year	2011
Abstract	SarkOne is a genus-specific satellite-DNA family, isolated from the genomes of the species of the genus Sarcocapnos. This satellite DNA is composed of repeats with a consensus length of 855 bp and a mean G+C content of 52.5%. We have sequenced a total of 189 SarkOne monomeric repeats belonging to a total of seven species of the genus Sarcocapnos. The comparative analysis of these sequences both at the intraspecific and the interspecific levels have revealed divergence patterns between species are proportional to between-species divergence according to the phylogeny of the genus. Our study demonstrates that the molecular drive leading to the concerted-evolution pattern of this satellite DNA is a time-dependent process by which new mutations are spreading through genomes and populations at a gradual pace. However, time is a limiting factor in the observation of concerted evolution in some pairwise comparisons. Thus, pairwise comparisons of species sharing a recent common ancestor did not reveal nucleotide sites in transitional stages higher than stage III according to the Strachan’s model. By contrast, there was a gradation in the percentage of upper transition stages (IV, V, VI) the more phylogenetically distant the species were. In addition, closely related species shared a high number of polymorphic sites, but these types of sites were not common when comparing more distant species. All these data are discussed in the light of current life-cycle models of satellite-DNA evolution.
Starting Page	19
Ending Page	29
Page Count	11
File Format	PDF
ISSN	01674412
Journal	Plant Molecular Biology
Volume Number	78
Issue Number	1-2
e-ISSN	15735028
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-11-12
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Satellite DNA Concerted evolution Molecular drive Sarcocapnos Plant Pathology Biochemistry Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Medicine Agronomy and Crop Science

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