Single-parent expression drives dynamic gene expression complementation in maize hybrids

文献类型： 外文期刊

第一作者： Li, Zhi

作者： Li, Zhi;Della Coletta, Rafael;Brohammer, Alex B.;O'Connor, Christine H.;Hirsch, Candice N.;Zhou, Peng;Springer, Nathan M.;Zhang, Tifu;Vaillancourt, Brieanne;Buell, C. Robin;Lipzen, Anna;Daum, Chris;Barry, Kerrie;de Leon, Natalia;Kaeppler, Shawn M.;Hirsch, Cory D.

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关键词： maize; single‐ parent expression; presence; absence variation; complementation; gene expression regulation; transposable element

期刊名称：PLANT JOURNAL （ 影响因子：6.417； 五年影响因子：7.627 ）

ISSN： 0960-7412

年卷期： 2021 年 105 卷 1 期

页码：

收录情况： SCI

摘要： Single-parent expression (SPE) is defined as gene expression in only one of the two parents. SPE can arise from differential expression between parental alleles, termed non-presence/absence (non-PAV) SPE, or from the physical absence of a gene in one parent, termed PAV SPE. We used transcriptome data of diverse Zea mays (maize) inbreds and hybrids, including 401 samples from five different tissues, to test for differences between these types of SPE genes. Although commonly observed, SPE is highly genotype and tissue specific. A positive correlation was observed between the genetic distance of the two inbred parents and the number of SPE genes identified. Regulatory analysis showed that PAV SPE and non-PAV SPE genes are mainly regulated by cis effects, with a small fraction under trans regulation. Polymorphic transposable element insertions in promoter sequences contributed to the high level of cis regulation for PAV SPE and non-PAV SPE genes. PAV SPE genes were more frequently expressed in hybrids than non-PAV SPE genes. The expression of parentally silent alleles in hybrids of non-PAV SPE genes was relatively rare but occurred in most hybrids. Non-PAV SPE genes with expression of the silent allele in hybrids are more likely to exhibit above high parent expression level than hybrids that do not express the silent allele, leading to non-additive expression. This study provides a comprehensive understanding of the nature of non-PAV SPE and PAV SPE genes and their roles in gene expression complementation in maize hybrids.

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