2012 Student Research Conference:
25th Annual Student Research Conference

Analysis of paralog evolution within homeologous regions of chromosomes 6, 5 and 9 of maize
Aubrey A. Crowley*, Avinash Karn, Michael J. Pierro, Kyle S. Smith, Joshua B. Wilson, and Lauren Choate
Dr. Brent Buckner, Faculty Mentor

Maize is an ancient tetraploid that underwent a diploidization event. During diploidization, one of the duplicated homeologous paralog pairs tends to be lost, a process called fractionation. When both paralog pairs are retained, one typically exhibits higher expression. This retention and expression are biased toward one of the ancestral genomes, thus the maize genome has two subgenomes. To analyze retained homeologous paralog pairs from syntenic regions of Chromosomes 5, 6, and 9, we visualized them at MaizeGDB.org, compared them using the GeVo function of CoGe, and gathered expression data from Plexdb.org. Functional annotations for all genes were performed using InterProScan and our overall results were visualized using Circos. Presently, we are evaluating the consistency of the functional annotations with the balanced gene drive model and exhibition of subgenome bias in the retention/decay, gene density, and expression patterns of homeologous paralog pairs.

Keywords: synteny, Maize, genome, evolution, annotation

Topic(s):Biology

Presentation Type: Poster

Session: 200-5
Location: Georgian Room - SUB
Time: 3:30

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