scholarly journals Fungal mating-type loci

2003 ◽  
Vol 13 (20) ◽  
pp. R792-R795 ◽  
Author(s):  
James A. Fraser ◽  
Joseph Heitman
Keyword(s):  
Mating Type ◽  
Fungal Mating

scholarly journals Higher Gene Flow in Sex-Related Chromosomes than in Autosomes during Fungal Divergence

2019 ◽  
Vol 37 (3) ◽  
pp. 668-682 ◽  
Author(s):  
Fanny E Hartmann ◽  
Ricardo C Rodríguez de la Vega ◽  
Pierre Gladieux ◽  
Wen-Juan Ma ◽  
Michael E Hood ◽  
...  
Keyword(s):  
Gene Flow ◽  
Mating Type ◽  
Sex Chromosomes ◽  
Smut Fungi ◽  
Effective Population ◽  
Closely Related Species ◽  
Fungal Mating ◽  
Anther Smut ◽  
Genomic Regions

Abstract Nonrecombining sex chromosomes are widely found to be more differentiated than autosomes among closely related species, due to smaller effective population size and/or to a disproportionally large-X effect in reproductive isolation. Although fungal mating-type chromosomes can also display large nonrecombining regions, their levels of differentiation compared with autosomes have been little studied. Anther-smut fungi from the Microbotryum genus are castrating pathogens of Caryophyllaceae plants with largely nonrecombining mating-type chromosomes. Using whole genome sequences of 40 fungal strains, we quantified genetic differentiation among strains isolated from the geographically overlapping North American species and subspecies of Silene virginica and S. caroliniana. We inferred that gene flow likely occurred at the early stages of divergence and then completely stopped. We identified large autosomal genomic regions with chromosomal inversions, with higher genetic divergence than the rest of the genomes and highly enriched in selective sweeps, supporting a role of rearrangements in preventing gene flow in genomic regions involved in ecological divergence. Unexpectedly, the nonrecombining mating-type chromosomes showed lower divergence than autosomes due to higher gene flow, which may be promoted by adaptive introgressions of less degenerated mating-type chromosomes. The fact that both mating-type chromosomes are always heterozygous and nonrecombining may explain such patterns that oppose to those found for XY or ZW sex chromosomes. The specific features of mating-type chromosomes may also apply to the UV sex chromosomes determining sexes at the haploid stage in algae and bryophytes and may help test general hypotheses on the evolutionary specificities of sex-related chromosomes.

Fungal mating type genes — regulators of sexual development

1992 ◽  
Vol 96 (12) ◽  
pp. 993-1006 ◽  
Author(s):  
Ursula Kües ◽  
Lorna A. Casselton
Keyword(s):  
Mating Type ◽  
Sexual Development ◽  
Fungal Mating ◽  
Mating Type Genes

scholarly journals Tracing the Origin of the Fungal α1 Domain Places Its Ancestor in the HMG-Box Superfamily: Implication for Fungal Mating-Type Evolution

PLoS ONE ◽  
2010 ◽  
Vol 5 (12) ◽  
pp. e15199 ◽  
Author(s):  
Tom Martin ◽  
Shun-Wen Lu ◽  
Herman van Tilbeurgh ◽  
Daniel R. Ripoll ◽  
Christina Dixelius ◽  
...  
Keyword(s):  
Mating Type ◽  
Hmg Box ◽  
Fungal Mating

A fungal mating type protein that regulates sexual and asexual development contains a POU-related domain.

1992 ◽  
Vol 11 (5) ◽  
pp. 1805-1813 ◽  
Author(s):  
A.M. Tymon ◽  
U. Kües ◽  
W.V. Richardson ◽  
L.A. Casselton
Keyword(s):  
Mating Type ◽  
Asexual Development ◽  
Type Protein ◽  
Fungal Mating

scholarly journals Little Evidence of Antagonistic Selection in the Evolutionary Strata of Fungal Mating-Type Chromosomes (Microbotryum lychnidis-dioicae)

2019 ◽  
pp. g3.400242.2019 ◽  
Author(s):  
Anna Liza Bazzicalupo ◽  
Fantin Carpentier ◽  
Sarah Perin Otto ◽  
Tatiana Giraud
Keyword(s):  
Mating Type ◽  
Antagonistic Selection ◽  
Fungal Mating

scholarly journals Mating-Type Locus of Cryptococcus neoformans: a Step in the Evolution of Sex Chromosomes

2002 ◽  
Vol 1 (5) ◽  
pp. 704-718 ◽  
Author(s):  
Klaus B. Lengeler ◽  
Deborah S. Fox ◽  
James A. Fraser ◽  
Andria Allen ◽  
Keri Forrester ◽  
...  
Keyword(s):  
Cryptococcus Neoformans ◽  
Mating Type ◽  
Sex Chromosomes ◽  
Sexual Development ◽  
New Paradigm ◽  
Type Locus ◽  
Mating Type Locus ◽  
Fungal Mating ◽  
Kinase Cascade ◽  
Nonself Recognition

ABSTRACT The sexual development and virulence of the fungal pathogen Cryptococcus neoformans is controlled by a bipolar mating system determined by a single locus that exists in two alleles, α and a. The α and a mating-type alleles from two divergent varieties were cloned and sequenced. The C. neoformans mating-type locus is unique, spans >100 kb, and contains more than 20 genes. MAT-encoded products include homologs of regulators of sexual development in other fungi, pheromone and pheromone receptors, divergent components of a MAP kinase cascade, and other proteins with no obvious function in mating. The α and a alleles of the mating-type locus have extensively rearranged during evolution and strain divergence but are stable during genetic crosses and in the population. The C. neoformans mating-type locus is strikingly different from the other known fungal mating-type loci, sharing features with the self-incompatibility systems and sex chromosomes of algae, plants, and animals. Our study establishes a new paradigm for mating-type loci in fungi with implications for the evolution of cell identity and self/nonself recognition.

Development of a PCR assay for amplification of mating-type loci of Alternaria spp. and related fungi.

2013 ◽  
Vol 65 (1) ◽  
pp. 69-78 ◽  
Author(s):  
Philipp B. Gannibal ◽  
Igor A. Kazartsev
Keyword(s):  
Mating Type ◽  
Pcr Assay
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