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DTSTART:20180325T030000
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DTSTART:20181028T020000
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DTSTAMP:20260409T031820Z
UID:5b754ab0d633c246584931@ist.ac.at
DTSTART:20180827T110000
DTEND:20180827T120000
DESCRIPTION:Speaker: Nancy Chen\nhosted by Nick Barton\nAbstract: The funda
 mental goal of the field of population genetics is to understand the evolu
 tionary processes that govern allele frequency change. However\, the actua
 l mechanisms causing these changes - variation in individual survival\, re
 productive success\, and movement - are often difficult to directly measur
 e in natural populations. Fully understanding these processes requires the
  population pedigree\, the set of relationships among all individuals in t
 he population through time. Here\, we elucidate the relative roles of diff
 erent evolutionary processes in shaping patterns of genetic variation thro
 ugh time using a 25-year genomic\, phenotypic\, and pedigree dataset in th
 e Florida Scrub-Jay (Aphelocoma coerulescens). Using gene dropping simulat
 ions\, we estimated individual long-term genetic contributions and show ho
 w they are linked to measures of individual fitness and predictions of all
 ele frequency change. Our approach allows us to quantify the expected gene
 tic contribution of recent immigrants and identify large allele frequency 
 shifts due to gene flow or selection. We modeled the relative roles of dif
 ferent evolutionary processes in shaping patterns of genetic variation gen
 ome-wide. Finally\, we modified existing selection component analysis fram
 eworks to test for selection acting on specific life-cycle stages. We iden
 tified a number of loci that clearly exhibited male gametic selection\, se
 xual selection\, and viability selection. By combining pedigree-based mode
 ls with fine-scale dissection of selection components\, this work provides
  a one of the most complete characterizations of the roles of selection\, 
 gene flow\, and drift in governing allele frequency dynamics in a natural 
 population to date.
LOCATION:Meeting room 1st floor / Central Bldg. (I01.1OG - Zentralgebäude)
 \, ISTA
ORGANIZER:abonvent@ist.ac.at
SUMMARY:Nancy Chen: Tracking short-term evolution in a pedigreed wild popul
 ation
URL:https://talks-calendar.ista.ac.at/events/1350
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