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Towards the molecular basis of heterosis

机译:迈向杂种优势的分子基础

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Heterosis describes the superior performance of heterozygous hybrid plants over their homozygous parental inbred lines. Despite the rediscovery of this phenomenon a century ago and its paramount agronomic importance, the genetic and molecular basis of heterosis remains enigmatic. Recently, various pioneer studies described differences in genome organization and gene expression of hybrids and their parental inbred lines. At the genomic level, a significant loss of colinearity at many loci between different inbred lines of maize was observed. At the level of gene expression, complex transcriptional networks specific for different developmental stages and tissues were monitored in maize (Zea mays), rice (Oryza sativa) and Arabidopsis (Arabidopsis thaliana). Integration of this complex expression data might contribute to improve our understanding of the molecular basis of heterosis.
机译:杂种优势描述了杂合杂种植物优于其纯合亲本近交系。尽管一个世纪前重新发现了这种现象,并且其在农学上具有极其重要的意义,但杂种优势的遗传和分子基础仍然是个谜。最近,各种先驱研究描述了杂种及其亲本近交系在基因组组织和基因表达上的差异。在基因组水平上,观察到玉米不同自交系之间许多位点的共线性显着损失。在基因表达水平上,在玉米(Zea mays),水稻(Oryza sativa)和拟南芥(Arabidopsis thaliana)中监测了针对不同发育阶段和组织的复杂转录网络。这种复杂的表达数据的整合可能有助于增进我们对杂种优势的分子基础的理解。

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