AustralieFrV1, Main, Exploration, bibRecord, 002F94

Contrasted patterns in mating-type chromosomes in fungi: hotspots versus coldspots of recombination

Identifieur interne : 002F94 ( Main/Exploration ); précédent : 002F93; suivant : 002F95

Contrasted patterns in mating-type chromosomes in fungi: hotspots versus coldspots of recombination

Auteurs : Alexander Idnurm [Australie] ; Michael E. Hood [États-Unis] ; Hanna Johannesson [Suède] ; Tatiana Giraud [France]

Source :

Fungal biology reviews [ 1749-4613 ] ; 2015.

RBID : PMC:4680991

Abstract

It is striking that, while central to sexual reproduction, the genomic regions determining sex or mating-types are often characterized by suppressed recombination that leads to a decrease in the efficiency of selection, shelters genetic load, and inevitably contributes to their genic degeneration. Research on model and lesser-explored fungi has revealed similarities in recombination suppression of the genomic regions involved in mating compatibility across eukaryotes, but fungi also provide opposite examples of enhanced recombination in the genomic regions that determine their mating types. These contrasted patterns of genetic recombination (sensu lato, including gene conversion and ectopic recombination) in regions of the genome involved in mating compatibility point to important yet complex processes occurring in their evolution. A number of pieces in this puzzle remain to be solved, in particular on the unclear selective forces that may cause the patterns of recombination, prompting theoretical developments and experimental studies. This review thus points to fungi as a fascinating group for studying the various evolutionary forces at play in the genomic regions involved in mating compatibility.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4680991

DOI: 10.1016/j.fbr.2015.06.001
PubMed: 26688691
PubMed Central: 4680991

Affiliations:

Le document en format XML

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<front><div type="abstract" xml:lang="en"><p id="P2">It is striking that, while central to sexual reproduction, the genomic regions determining sex or mating-types are often characterized by suppressed recombination that leads to a decrease in the efficiency of selection, shelters genetic load, and inevitably contributes to their genic degeneration. Research on model and lesser-explored fungi has revealed similarities in recombination suppression of the genomic regions involved in mating compatibility across eukaryotes, but fungi also provide opposite examples of enhanced recombination in the genomic regions that determine their mating types. These contrasted patterns of genetic recombination (<italic>sensu lato,</italic>
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Contrasted patterns in mating-type chromosomes in fungi: hotspots versus coldspots of recombination

Contrasted patterns in mating-type chromosomes in fungi: hotspots versus coldspots of recombination

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Abstract

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