Gene expression analysis at the intersection of ploidy and hybridity in maize.

ABSTRACT: Heterosis and polyploidy are two important aspects of plant evolution. To examine these issues, we conducted a global gene expression study of a maize ploidy series as well as a set of tetraploid inbred and hybrid lines. This gene expression analysis complements an earlier phenotypic study of these same materials. We find that ploidy change affects a large fraction of the genome, albeit at low levels; gene expression changes rarely exceed 2-fold and are typically not statistically significant. The most common gene expression profile we detected is greater than linear increase from monoploid to diploid, and reductions from diploid to triploid and from triploid to tetraploid, a trend that mirrors plant stature. When examining heterosis in tetraploid maize lines, we found a large fraction of

ORGANISM(S): Zea mays

SUBMITTER: Nicole Riddle 

PROVIDER: E-GEOD-25526 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress