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Abstract Detail



Botany 2015 Colloquium: Integrated perspectives on the ecology, genetics and coevolution of intimate mutualisms

Grillo, Michael [1], Heath, Katy [2].

Population genomics in the model legume, Medicago truncatula.

The role of geography has become established as a central issue in studies of coevolution. Modern sequencing approaches now allow for the examination of coevolutionary selection at the molecular level. Towards this goal, a population genomic analysis was conducted in the model legume, Medicago truncatula, to assess the scale of population genetic structure and scan the genome for symbiosis related genes that have been under selection. Using RAD-seq over 26,000 SNPs were generated from 192 individuals from 12 sampling sites within the native range. STRUCTURE analysis has revealed 5 distinct clusters underlying these accessions. Approximately 70 loci were identified as genomic outliers, including the symbiosis gene, DMI1. This work sets the stage for corresponding studies of genetic structure in the associated rhizobium and can shed light on the mechanisms that maintain genetic variation within this mutualism.


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1 - University of Illinois, Plant Biology, 250 Morrill Hall, 505 S. Goodwin Avenue, Urbana, IL, 61801, USA
2 - University of Illinois, Plant Biology, 249 Morrill Hall, 505 S. Goodwin Avenue, Urbana, IL, 61801, USA

Keywords:
coevolution
mutualism
legume
Medicago
Population Genomics.

Presentation Type: Colloquium Presentations
Session: C4
Location: Hall C/The Shaw Conference Centre
Date: Tuesday, July 28th, 2015
Time: 5:00 PM
Number: C4014
Abstract ID:1466
Candidate for Awards:None


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