Genomic rearrangements in trypanosomatids: an alternative to the "one gene" evolutionary hypotheses?
Most molecular trees of trypanosomatids are based on point mutations within DNA sequences. In contrast, there are very few evolutionary studies considering DNA (re) arrangement as genetic characters. Waiting for the completion of the various parasite genome projects, first information may already be...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Fundação Oswaldo Cruz (FIOCRUZ)
2000-08-01
|
| Series: | Memorias do Instituto Oswaldo Cruz |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762000000400015 |
| _version_ | 1827847578997227520 |
|---|---|
| author | JC Dujardin J Henriksson K Victoir S Brisse D Gamboa J Arevalo D Le Ray |
| author_facet | JC Dujardin J Henriksson K Victoir S Brisse D Gamboa J Arevalo D Le Ray |
| author_sort | JC Dujardin |
| collection | DOAJ |
| description | Most molecular trees of trypanosomatids are based on point mutations within DNA sequences. In contrast, there are very few evolutionary studies considering DNA (re) arrangement as genetic characters. Waiting for the completion of the various parasite genome projects, first information may already be obtained from chromosome size-polymorphism, using the appropriate algorithms for data processing. Three illustrative models are presented here. First, the case of Leishmania (Viannia) braziliensis/L. (V.) peruviana is described. Thanks to a fast evolution rate (due essentially to amplification/deletion of tandemly repeated genes), molecular karyotyping seems particularly appropriate for studying recent evolutionary divergence, including eco-geographical diversification. Secondly, karyotype evolution is considered at the level of whole genus Leishmania. Despite the fast chromosome evolution rate, there is qualitative congruence with MLEE- and RAPD-based evolutionary hypotheses. Significant differences may be observed between major lineages, likely corresponding to major and less frequent rearrangements (fusion/fission, translocation). Thirdly, comparison is made with Trypanosoma cruzi. Again congruence is observed with other hypotheses and major lineages are delineated by significant chromosome rearrangements. The level of karyotype polymorphism within that "species" is similar to the one observed in "genus" Leishmania. The relativity of the species concept among these two groups of parasites is discussed. |
| first_indexed | 2024-03-12T09:32:17Z |
| format | Article |
| id | doaj.art-854cc19a0c6d47b7936b303e0d5d7dfa |
| institution | Directory Open Access Journal |
| issn | 0074-0276 1678-8060 |
| language | English |
| last_indexed | 2024-03-12T09:32:17Z |
| publishDate | 2000-08-01 |
| publisher | Fundação Oswaldo Cruz (FIOCRUZ) |
| record_format | Article |
| series | Memorias do Instituto Oswaldo Cruz |
| spelling | doaj.art-854cc19a0c6d47b7936b303e0d5d7dfa2023-09-02T13:54:01ZengFundação Oswaldo Cruz (FIOCRUZ)Memorias do Instituto Oswaldo Cruz0074-02761678-80602000-08-0195452753410.1590/S0074-02762000000400015Genomic rearrangements in trypanosomatids: an alternative to the "one gene" evolutionary hypotheses?JC DujardinJ HenrikssonK VictoirS BrisseD GamboaJ ArevaloD Le RayMost molecular trees of trypanosomatids are based on point mutations within DNA sequences. In contrast, there are very few evolutionary studies considering DNA (re) arrangement as genetic characters. Waiting for the completion of the various parasite genome projects, first information may already be obtained from chromosome size-polymorphism, using the appropriate algorithms for data processing. Three illustrative models are presented here. First, the case of Leishmania (Viannia) braziliensis/L. (V.) peruviana is described. Thanks to a fast evolution rate (due essentially to amplification/deletion of tandemly repeated genes), molecular karyotyping seems particularly appropriate for studying recent evolutionary divergence, including eco-geographical diversification. Secondly, karyotype evolution is considered at the level of whole genus Leishmania. Despite the fast chromosome evolution rate, there is qualitative congruence with MLEE- and RAPD-based evolutionary hypotheses. Significant differences may be observed between major lineages, likely corresponding to major and less frequent rearrangements (fusion/fission, translocation). Thirdly, comparison is made with Trypanosoma cruzi. Again congruence is observed with other hypotheses and major lineages are delineated by significant chromosome rearrangements. The level of karyotype polymorphism within that "species" is similar to the one observed in "genus" Leishmania. The relativity of the species concept among these two groups of parasites is discussed.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762000000400015LeishmaniaTrypanosoma cruzichromosome evolution |
| spellingShingle | JC Dujardin J Henriksson K Victoir S Brisse D Gamboa J Arevalo D Le Ray Genomic rearrangements in trypanosomatids: an alternative to the "one gene" evolutionary hypotheses? Memorias do Instituto Oswaldo Cruz Leishmania Trypanosoma cruzi chromosome evolution |
| title | Genomic rearrangements in trypanosomatids: an alternative to the "one gene" evolutionary hypotheses? |
| title_full | Genomic rearrangements in trypanosomatids: an alternative to the "one gene" evolutionary hypotheses? |
| title_fullStr | Genomic rearrangements in trypanosomatids: an alternative to the "one gene" evolutionary hypotheses? |
| title_full_unstemmed | Genomic rearrangements in trypanosomatids: an alternative to the "one gene" evolutionary hypotheses? |
| title_short | Genomic rearrangements in trypanosomatids: an alternative to the "one gene" evolutionary hypotheses? |
| title_sort | genomic rearrangements in trypanosomatids an alternative to the one gene evolutionary hypotheses |
| topic | Leishmania Trypanosoma cruzi chromosome evolution |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762000000400015 |
| work_keys_str_mv | AT jcdujardin genomicrearrangementsintrypanosomatidsanalternativetotheonegeneevolutionaryhypotheses AT jhenriksson genomicrearrangementsintrypanosomatidsanalternativetotheonegeneevolutionaryhypotheses AT kvictoir genomicrearrangementsintrypanosomatidsanalternativetotheonegeneevolutionaryhypotheses AT sbrisse genomicrearrangementsintrypanosomatidsanalternativetotheonegeneevolutionaryhypotheses AT dgamboa genomicrearrangementsintrypanosomatidsanalternativetotheonegeneevolutionaryhypotheses AT jarevalo genomicrearrangementsintrypanosomatidsanalternativetotheonegeneevolutionaryhypotheses AT dleray genomicrearrangementsintrypanosomatidsanalternativetotheonegeneevolutionaryhypotheses |