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DTSTART:20170326T030000
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DTSTART:20171029T020000
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DTSTAMP:20260427T115951Z
UID:59bf78e29bdfb180454769@ist.ac.at
DTSTART:20170927T143000
DTEND:20170927T150000
DESCRIPTION:Speaker: Katalin Csillery\nhosted by Nick Barton\nAbstract: Spe
 cies range edges are often characterized by small population sizes and hig
 h degree of isolation. Evolutionary theory predicts that such populations 
 harbour less genetic diversity than populations from the centre of the dis
 tribution range\, and that under such conditions adaptation is prevented. 
 We tested these predictions using patterns of the genetic variation across
  53 populations (with 20 individuals from each) of silver fir (Abies alba)
  across the western part of the species' natural range. We sampled stands 
 from southern France and Italy\, through Switzerland and Germany. Genetic 
 diversity was characterized from 338 SNP loci\, some from neutrally evolvi
 ng regions\, while others from candidate gene regions. Further\, we measur
 ed an adaptive trait on each tree\, its water use efficiency\, that is exp
 ected to play a key role under global warming. We found no evidence that m
 arginal populations generally harbour less diversity\, instead we speculat
 e that population history play a major role in shaping diversity patterns.
  Water use efficiency shows a distinct spatial pattern\, with southern pop
 ulations and northern populations from dry regions being the most drought 
 tolerant. Overall\, peripheral populations in southern France appear to ha
 ve a high conservation value as they can potentially be pre-adapted to fut
 ure drier climatic conditions.
LOCATION:Meeting room 1st floor / Central Bldg. (I01.1OG - Zentralgebäude)
 \, ISTA
ORGANIZER:abonvent@ist.ac.at
SUMMARY:Katalin Csillery: Genetic diversity and water use efficiency in 53 
 silver fir populations from marginal and core areas of the species range
URL:https://talks-calendar.ista.ac.at/events/827
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