English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The rDNAs of 125 isolates of the haploid, heterothallic, cactophilic yeast Clavispora opuntiae collected worldwide were mapped with 12 restriction endonucleases. Thirty distinct repetypes were identified, and, with the exception of a single strain which had a unique restriction site in its large subunit coding region, the variation was confined to the intergenic spacer. The majority of the restriction sites were randomly assorted with respect to the mating-type alleles, indicating that sexual exchange within that facultatively outbreeding yeast species has been significant over evolutionary time. The restriction sites were also generally free of associations among one another, suggesting that rDNA homogenization has been intense and has favored the fixation of recombinant repetypes. Occasional associations or exclusions among sites or between sites and the mating types were attributed either to sampling bias or to recent introductions, in which the effects of random mating are overshadowed by founder effects. One intergenic spacer repetype was broadly dominant in yeasts isolated from cacti with a recent history of deliberate infestation with the moth Cactoblastis cactorum for biological control purposes. Human activity can thus be held accountable for a worldwide redistribution of yeast genotypes in this case.

Ribosomal DNA Spacer Variation in the Cactophilic Yeast Clavispora opuntiae