| Full text | |
| Author(s): |
Total Authors: 2
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| Affiliation: | [1] Univ Sao Paulo, Inst Biociencias, Dept Zool, Rua Matao, Travessa 14, 101, BR-05508090 Sao Paulo - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | BIOESSAYS; v. 41, n. 6 JUN 2019. |
| Web of Science Citations: | 3 |
| Abstract | |
Here a wide distribution of meiotic machinery is shown, indicating the occurrence of sexual processes in all major eukaryotic groups, without exceptions, including the putative asexuals. Meiotic machinery has evolved from archaeal DNA repair machinery by means of ancestral gene duplications. Sex is very conserved and widespread in eukaryotes, even though its evolutionary importance is still a matter of debate. The main processes in sex are plasmogamy, followed by karyogamy and meiosis. Meiosis is fundamentally a chromosomal process, which implies recombination and ploidy reduction. Several eukaryotic lineages are proposed to be asexual because their sexual processes are never observed, but presumed asexuality correlates with lack of study. The authors stress the complete lack of meiotic proteins in nucleomorphs and their almost complete loss in the fungus Malassezia. Inversely, complete sets of meiotic proteins are present in fungal groups Glomeromycotina, Trichophyton, and Cryptococcus. Endosymbiont Perkinsela and endoparasitic Microsporidia also present meiotic proteins. (AU) | |
| FAPESP's process: | 15/06306-0 - Evolution of meiosis and sex in Amoebozoa |
| Grantee: | Paulo Gonzalez Hofstatter |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 13/04585-3 - Deciphering the major trends of molecular and morphological evolution in the Amoebozoa |
| Grantee: | Daniel José Galafasse Lahr |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 17/04391-5 - Evolution of meiosis in eukaryotes |
| Grantee: | Paulo Gonzalez Hofstatter |
| Support Opportunities: | Scholarships abroad - Research Internship - Doctorate |