Evolutionary dynamics of satellite DNAs in some coleopteran genera (CROSBI ID 491057)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
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
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
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