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DTSTART:20170326T030000
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DTSTART:20171029T020000
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DTSTAMP:20260428T095831Z
UID:5912db25c0e9e115431669@ist.ac.at
DTSTART:20170515T110000
DTEND:20170515T121500
DESCRIPTION:Speaker: Melissa Toups\nhosted by Beatriz Vicoso\nAbstract: Sex
  determination in Rana temporaria varies across the species range. High al
 titude and high latitude populations often have fully male-specific haplot
 ypes on the Y chromosome\, whereas low latitude and low altitude populatio
 ns lack male-specific regions in the genome.  In some populations\, sex de
 termination is polymorphic\; some males possess distinct Y chromosome hapl
 otypes on chromosome 1 (referred to as XY males)\, while others do not (re
 ferred to as XX males).  We hypothesized that XY males may have accumulate
 d male-beneficial alleles.  However\, no phenotypic distinction between XX
  and XY males has been detected in morphology\, hormone production\, or re
 productive success. We then tested whether XY had a more masculinized gene
  expression profile than XX males. We sequenced transcriptomes from female
 s\, XX males\, and XY males from an alpine population.  Few genes were dif
 ferentially expressed between XX and XY males\, and there was no enrichmen
 t of male-biased genes in XY males relative to XX males.  Contrary to our 
 expectation\, we detect no masculinizing effect of the Y chromosome\, sugg
 esting there is no advantage of male-specific alleles in R. temporaria.
LOCATION:Experimental Biology Room (I04.2OG - LAB)\, ISTA
ORGANIZER:lalesch@ist.ac.at
SUMMARY:Melissa Toups: The evolution of sexually dimorphic gene expression 
 in Rana temporaria
URL:https://talks-calendar.ista.ac.at/events/620
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