• Patrick S. Schnable
  • Ruth A. Swanson-Wagner


Although heterosis has been exploited commercially for close to a century, the molecular mechanisms underlying hybrid vigor are not well understood. Multiple models, including dominance and complementation, have been proposed. Historically, quantitative genetic approaches have been utilized to understand the regulation of heterosis as it affects traits such as yield. Recent technological advances have allowed for global studies of gene expression in inbreds and hybrids. These studies are consistent with multiple molecular mechanisms contributing to heterosis. An enhanced understanding of the regulation of cellular processes and their relationships to heterotic phenotypes are expected to enhance our ability to predict the performance of specific hybrids and hence to increase the rate of genetic gain.


Quantitative Trait Locus Inbred Line Quantitative Trait Locus Mapping Transcript Accumulation Parental Allele 
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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Patrick S. Schnable
  • Ruth A. Swanson-Wagner

There are no affiliations available

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