Satellitome comparison of two oedipodine grasshoppers highlights the contingent nature of satellite DNA evolution

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Camacho, Juan Pedro M.Univ Granada, Dept Genet, Granada 18071, Spain. (author)

Satellitome comparison of two oedipodine grasshoppers highlights the contingent nature of satellite DNA evolution

Article/chapterEnglish2022

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2022-02-07
Springer Nature,2022
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LIBRIS-ID:oai:DiVA.org:uu-469570
https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-469570URI
https://doi.org/10.1186/s12915-021-01216-9DOI

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Language:English
Summary in:English

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Correction in: BMC BIOLOGY, Volume 20, Issue 1, Article Number 69, DOI 10.1186/s12915-022-01260-z
BackgroundThe full catalog of satellite DNA (satDNA) within a same genome constitutes the satellitome. The Library Hypothesis predicts that satDNA in relative species reflects that in their common ancestor, but the evolutionary mechanisms and pathways of satDNA evolution have never been analyzed for full satellitomes. We compare here the satellitomes of two Oedipodine grasshoppers (Locusta migratoria and Oedaleus decorus) which shared their most recent common ancestor about 22.8 Ma ago.ResultsWe found that about one third of their satDNA families (near 60 in every species) showed sequence homology and were grouped into 12 orthologous superfamilies. The turnover rate of consensus sequences was extremely variable among the 20 orthologous family pairs analyzed in both species. The satDNAs shared by both species showed poor association with sequence signatures and motives frequently argued as functional, except for short inverted repeats allowing short dyad symmetries and non-B DNA conformations. Orthologous satDNAs frequently showed different FISH patterns at both intra- and interspecific levels. We defined indices of homogenization and degeneration and quantified the level of incomplete library sorting between species.ConclusionsOur analyses revealed that satDNA degenerates through point mutation and homogenizes through partial turnovers caused by massive tandem duplications (the so-called satDNA amplification). Remarkably, satDNA amplification increases homogenization, at intragenomic level, and diversification between species, thus constituting the basis for concerted evolution. We suggest a model of satDNA evolution by means of recursive cycles of amplification and degeneration, leading to mostly contingent evolutionary pathways where concerted evolution emerges promptly after lineages split.

Subject headings and genre

NATURVETENSKAP Biologi Evolutionsbiologi hsv//swe
NATURAL SCIENCES Biological Sciences Evolutionary Biology hsv//eng
Satellite DNA
Library Hypothesis
Satellitome Evolution
Cytogenomics

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Cabrero, JosefaUniv Granada, Dept Genet, Granada 18071, Spain. (author)
Lopez-Leon, Maria DoloresUniv Granada, Dept Genet, Granada 18071, Spain. (author)
Martin-Pecina, MariaUniv Granada, Dept Genet, Granada 18071, Spain. (author)
Perfectti, FranciscoUniv Granada, Dept Genet, Granada 18071, Spain.;Univ Granada, Res Unit Modeling Nat, Granada, Spain. (author)
Garrido-Ramos, Manuel A.Univ Granada, Dept Genet, Granada 18071, Spain. (author)
Ruiz-Ruano, Francisco J.Uppsala universitet,Systematisk biologi,Univ East Anglia, Sch Biol Sci, Norwich Res Pk, Norwich NR4 7TU, Norfolk, England.(Swepub:uu)fraru543 (author)
Univ Granada, Dept Genet, Granada 18071, Spain.Univ Granada, Dept Genet, Granada 18071, Spain.;Univ Granada, Res Unit Modeling Nat, Granada, Spain. (creator_code:org_t)

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In:BMC Biology: Springer Nature20:11741-7007

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