Molecular mechanisms of heterosis in Arabidopsis intraspecific hybrids

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  • Shiba Hiroshi
    Graduate School of Life and Environmental Sciences, University of Tsukuba

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  • シロイヌナズナ種内雑種で見られる雑種強勢の分子メカニズム
  • シロイヌナズナシュ ナイ ザッシュ デ ミラレル ザッシュ キョウ ゼイ ノ ブンシ メカニズム

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<p>Offspring with non-parental phenotypes is often observed from biallelic genes in diploid eukaryotic organisms. Heterosis arises from allelic interactions between parental genomes and progeny of intra- or inter-species cross exhibit greater biomass, speed of development, and stress tolerance than parental lines. Although numerous studies have been carried out to understand its genetic and/or molecular basis, the molecular mechanisms underlying heterosis and heterotic gene activity remain elusive. Recent advances in technical innovations for whole-genome/epigenome analyses have accelerated understanding of mechanisms underling heterosis. In this review, we introduce the overview of heterosis and heterotic patterns in Arabidopsis and discuss the correlation between epigenetic/genetic alteration and heterosis.</p>

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