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Evidence Of Same-sex Mating In Nature

Date:
October 22, 2007
Source:
Public Library of Science
Summary:
The study provides the first evidence of naturally occurring same-sex mating, and sheds light on the genetic and environmental factors that play important roles in the evolution of the current population structure of this pathogenic fungus.
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Cryptococcus neoformans is a major cause of fungal meningitis in predominantly immunocomprised individuals.

This fungus has two mating-types/sexes, and mating typically requires two individuals with opposite mating types. It had been a mystery why one mating type is overwhelmingly predominant in nature and how the capacity for sexual reproduction is maintained in a largely unisex population.

In an article published in PLoS Genetics, Xiaorong Lin and colleagues from Duke University Medical Center analyzed natural Cryptococcus diploid hybrid isolates containing two á alleles of different serotypic origins.

Natural áADá hybrids that arose by fusion between two á cells of different serotypes (A and D) were identified and characterized, demonstrating that same-sex mating transpires in nature. Same-sex mating had been observed under laboratory conditions, but direct evidence for naturally occurring same-sex mating was lacking.

This study provides the first evidence of this and sheds light on the genetic and environmental factors that play important roles in the evolution of the current population structure of this pathogenic fungus.

Citation: Lin X, Litvintseva AP, Nielsen K, Patel S, Floyd A, et al. (2007) áADá hybrids of Cryptococcus neoformans: Evidence of same-sex mating in nature and hybrid fitness. PLoS Genet 3(10): e186. doi:10.1371/journal.pgen.0030186


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Public Library of Science. "Evidence Of Same-sex Mating In Nature." ScienceDaily. ScienceDaily, 22 October 2007. <www.sciencedaily.com/releases/2007/10/071019090012.htm>.
Public Library of Science. (2007, October 22). Evidence Of Same-sex Mating In Nature. ScienceDaily. Retrieved July 31, 2015 from www.sciencedaily.com/releases/2007/10/071019090012.htm
Public Library of Science. "Evidence Of Same-sex Mating In Nature." ScienceDaily. www.sciencedaily.com/releases/2007/10/071019090012.htm (accessed July 31, 2015).

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