异源多倍体植物细胞核表达调节的变异

IF 3.3 3区 生物学 Genetics Pub Date : 2022-03-12 DOI:10.1101/2022.03.10.483839
C. Grover, Evan S. Forsythe, Joel Sharbrough, Emma R. Miller, Justin L. Conover, R. DeTar, Carolina Chavarro, Mark A. Arick, D. Peterson, S. Leal-Bertioli, Daniel B. Sloan, J. Wendel
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引用次数: 3

摘要

细胞核协同进化是植物的共同特征,它协调细胞核和细胞器之间的基因表达和蛋白质产物。因此,谱系特异性差异可能导致杂交类群细胞核和细胞质之间的不相容性。异源多倍体也是植物进化中的一种常见现象。异源多倍体的杂交性质可能导致细胞核不相容,但多倍体过程中产生的大量细胞核冗余为解决细胞核冲突(即细胞核调节)提供了额外的途径。在这里,我们评估了六个异源多倍体谱系的细胞器靶向核基因的表达变化,这些谱系代表四个属(即拟南芥、Arachis、藜属和棉属),并涵盖了一系列多倍体年龄。由于细胞核和细胞质之间的不相容性可能导致对母体同源性和/或母体表达水平的偏见,我们评估了与非细胞核表达变化背景和二倍体亲本相比,细胞核基因中同源性使用、表达偏见和表达水平优势的模式。尽管我们在大多数谱系中发现了与我们对母体偏好的预期相匹配的细胞核基因亚群,但这些观察结果在异源多倍体或细胞器靶向基因类别中并不一致。我们的研究结果表明,细胞核表达调节可能是一种微妙和/或可变的现象,不能捕捉到异多倍体植物解决核质不相容性的全部机制。
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Variation in cytonuclear expression accommodation among allopolyploid plants
Cytonuclear coevolution is a common feature among plants, which coordinates gene expression and protein products between the nucleus and organelles. Consequently, lineage-specific differences may result in incompatibilities between the nucleus and cytoplasm in hybrid taxa. Allopolyploidy is also a common phenomenon in plant evolution. The hybrid nature of allopolyploids may result in cytonuclear incompatibilities, but the massive nuclear redundancy created during polyploidy affords additional avenues for resolving cytonuclear conflict (i.e., cytonuclear accommodation). Here we evaluate expression changes in organelle-targeted nuclear genes for six allopolyploid lineages that represent four genera (i.e., Arabidopsis, Arachis, Chenopodium, and Gossypium) and encompass a range in polyploid ages. Because incompatibilities between the nucleus and cytoplasm could potentially result in biases toward the maternal homoeolog and/or maternal expression level, we evaluate patterns of homoeolog usage, expression bias, and expression level dominance in cytonuclear genes relative to the background of non-cytonuclear expression changes and to the diploid parents. Although we find subsets of cytonuclear genes in most lineages that match our expectations of maternal preference, these observations are not consistent among either allopolyploids or categories of organelle-targeted genes. Our results indicate that cytonuclear expression accommodation may be a subtle and/or variable phenomenon that does not capture the full range of mechanisms by which allopolyploid plants resolve nuclear-cytoplasmic incompatibilities.
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来源期刊
Genetics
Genetics 生物-遗传学
CiteScore
6.20
自引率
6.10%
发文量
177
期刊介绍: GENETICS is published by the Genetics Society of America, a scholarly society that seeks to deepen our understanding of the living world by advancing our understanding of genetics. Since 1916, GENETICS has published high-quality, original research presenting novel findings bearing on genetics and genomics. The journal publishes empirical studies of organisms ranging from microbes to humans, as well as theoretical work. While it has an illustrious history, GENETICS has changed along with the communities it serves: it is not your mentor''s journal. The editors make decisions quickly – in around 30 days – without sacrificing the excellence and scholarship for which the journal has long been known. GENETICS is a peer reviewed, peer-edited journal, with an international reach and increasing visibility and impact. All editorial decisions are made through collaboration of at least two editors who are practicing scientists. GENETICS is constantly innovating: expanded types of content include Reviews, Commentary (current issues of interest to geneticists), Perspectives (historical), Primers (to introduce primary literature into the classroom), Toolbox Reviews, plus YeastBook, FlyBook, and WormBook (coming spring 2016). For particularly time-sensitive results, we publish Communications. As part of our mission to serve our communities, we''ve published thematic collections, including Genomic Selection, Multiparental Populations, Mouse Collaborative Cross, and the Genetics of Sex.
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