Gene expression analyses in maize inbreds and hybrids with varying levels of heterosis.

ABSTRACT:

Background

Heterosis is the superior performance of F1 hybrid progeny relative to the parental phenotypes. Maize exhibits heterosis for a wide range of traits, however the magnitude of heterosis is highly variable depending on the choice of parents and the trait(s) measured. We have used expression profiling to determine whether the level, or types, of non-additive gene expression vary in maize hybrids with different levels of genetic diversity or heterosis.

Results

We observed that the distributions of better parent heterosis among a series of 25 maize hybrids generally do not exhibit significant correlations between different traits. Expression profiling analyses for six of these hybrids, chosen to represent diversity in genotypes and heterosis responses, revealed a correl

SUBMITTER: Stupar RM 

PROVIDER: S-EPMC2365949 | biostudies-literature | 2008 Apr

REPOSITORIES: biostudies-literature