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DTSTAMP:20260404T015807Z
UID:5e43bd6be47da198063221@ist.ac.at
DTSTART:20200226T123000
DTEND:20200226T133000
DESCRIPTION:Speaker: Moria Robinson\nhosted by Carina Baskett\nAbstract: Si
 nce the advent of agriculture over 12\,000 years ago\, humans have been a 
 powerful evolutionary force shaping the phenotypes of plants. While domest
 ication selection is often considered a unique form of plant evolution\, u
 nderstanding how crops differ from their wild progenitors can shed light o
 n basic evolutionary processes\, and help us link plant traits to ecologic
 al outcomes. Thus far\, the study of domestication syndromes has focused o
 n changes in plant-level trait means. For example\, crop plants often exhi
 bit shifts in the average size of their seeds\, sugar content of their fru
 it\, or toxin concentration of their leaves. However\, this focus on the a
 verage overlooks an important component of the plant phenotype: the magnit
 ude of within-plant trait variability among plant reiterated organs. While
  this variability is often considered noise around a more meaningful mean\
 , trait variance per se can affect critical biotic interactions\, and evol
 ve together with or independently of trait means. In the present study\, w
 e ask how levels of within-plant\, among-leaf trait variability have chang
 ed with domestication in a key forage crop (alfalfa\; Medicago sativa). To
  do this\, we quantified and compared levels of trait variability between 
 wild and domestic plants in a common garden\, stratifying sampling within 
 and among leaf age classes to explore the role of leaf ontogeny in shaping
  patterns of within-plant variability. We find frequent shifts in levels o
 f within-plant variability with domestication\, and conclude that within-p
 lant variability is an underexplored component of the domestication syndro
 me and\, potentially\, of plant trait evolution more generally.
LOCATION:Heinzel Seminar Room / Office Bldg West (I21.EG.101)\, ISTA
ORGANIZER:cfraisse@ist.ac.at
SUMMARY:Moria Robinson: Domestication selection and shifts in trait variabi
 lity at the within-plant scale
URL:https://talks-calendar.ista.ac.at/events/2668
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