Abstract
Heterosis describes the superior performance of F1-hybrids compared to their genetically distinct parents, a phenomenon which is extensively exploited in maize breeding. To better understand the molecular basis of heterosis in maize, we analyzed how the genetic diversity of parental inbred lines affects the root transcriptome of their F1-progeny. We discovered complementation of activity in evolutionary younger genes and as a consequence more active genes in hybrids than in parental inbred lines.
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