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Evolutionary dynamics of satellite DNAs in some coleopteran genera (CROSBI ID 491057)

Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija

Ugarković, Đurđica ; Mravinac, Brankica ; Bruvo, Branka ; Meštrović, Nevenka ; Plohl, Miroslav Evolutionary dynamics of satellite DNAs in some coleopteran genera // 9th Congress of the European Society for Evolutionary Biology : Book of Abstracts / Butlin, Roger (ur.). Leeds: Leeds University, 2003. str. 522-522-x

Podaci o odgovornosti

Ugarković, Đurđica ; Mravinac, Brankica ; Bruvo, Branka ; Meštrović, Nevenka ; Plohl, Miroslav

engleski

Evolutionary dynamics of satellite DNAs in some coleopteran genera

Different satellite DNAs coexist in the genome forming a set called the satellite DNA library. Within a library satellite DNAs evolve in nucleotide sequence and in copy number. We have studied the evolutionary dynamics of two different satellites PRAT and PMON in the genera <i>Palorus</i> and <i>Pimelia</i> (Tenebrionidae, Coleoptera). PRAT is present as a highly abundant satellite in the species <i>Palorus ratzeburgii</i> and as a low copy number satellite in other congeneric species. This satellite is also detected in species from the related genera <i>Tenebrio</i> and <i>Tribolium</i> as well as in the more distant genus <i>Pimelia</i>. The comparison of PRAT sequences from different species reveals a high degree of sequence conservation. The mutations profiles are very similar, containing mostly ancestral mutations while species specific mutations are absent even in <i>Pimelia</i> species, although the genera <i>Palorus</i> and <i>Pimelia</i> are separated by 50-60 Myr. The other satellite family, PMON, is spread among all tested <i>Pimelia</i> species ranging from highly abundant to low copy number sequence. The PMON sequence is diverging gradually, mostly due to the accumulation of single point mutations. These mutations are not fixed at the level of species but are species-group specific. The PMON satellite is not detected outside of the genus <i>Pimelia</i> probably due to sequence divergence beyond recognition. The results reveal that the two satellite DNAs coexisting in some of the species behave as mutually independent evolutionary units, exhibiting different dynamics of sequence change. The dynamics of sequence change seems to be independent of the host species: PRAT satellite sequence is conserved between the analysed species, while PMON is accumulating changes gradually following species phylogeny. The observed high sequence conservation of the PRAT satellite might be induced by a bias of turnover mechanisms, or could indicate functional constraints.

satellite DNA; evolution; Tenebrionidae

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Podaci o prilogu

522-522-x.

2003.

objavljeno

Podaci o matičnoj publikaciji

9th Congress of the European Society for Evolutionary Biology : Book of Abstracts

Butlin, Roger

Leeds: Leeds University

Podaci o skupu

9th Congress of the European Society for Evolutionary Biology

poster

18.08.2003-24.08.2003

Leeds, Ujedinjeno Kraljevstvo

Povezanost rada

Biologija