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Fruit quality and DNA methylation are affected by parental order in reciprocal crosses of tomato
Plant Cell Reports ( IF 6.2 ) Pub Date : 2020-10-20 , DOI: 10.1007/s00299-020-02624-x
Magalí Diana Gimenez 1, 2 , Dana Valeria Vazquez 1 , Felipe Trepat 3 , Vladimir Cambiaso 1, 3 , Gustavo Rubén Rodríguez 1, 3
Affiliation  

Key message

Reciprocal effects were found for tomato fruit quality and DNA methylation. The epigenetic identity of reciprocal hybrids indicates that DNA methylation might be one of the mechanisms involved in POEs.

Abstract

Crosses between different genotypes and even between different species are commonly used in plant breeding programs. Reciprocal hybrids are obtained by changing the cross direction (or the sexual role) of parental genotypes in a cross. Phenotypic differences between these hybrids constitute reciprocal effects (REs). The aim of this study was to evaluate phenotypic differences in tomato fruit traits and DNA methylation profiles in three inter- and intraspecific reciprocal crosses. REs were detected for 13 of the 16 fruit traits analyzed. The number of traits with REs was the lowest in the interspecific cross, whereas the highest was found in the cross between recombinant inbred lines (RILs) derived from the same interspecific cross. An extension of gene action analysis was proposed to incorporate parent-of-origin effects (POEs). Maternal and paternal dominance were found in four fruit traits. REs and paternal inheritance were found for epiloci located at coding and non-coding regions. The epigenetic identity displayed by the reciprocal hybrids accounts for the phenotypic differences among them, indicating that DNA methylation might be one of the mechanisms involved in POEs.



中文翻译:

番茄互交中亲本顺序影响果实品质和DNA甲基化

关键信息

发现了番茄果实品质和 DNA 甲基化的相互影响。互惠杂种的表观遗传特性表明 DNA 甲基化可能是参与 POE 的机制之一。

抽象的

不同基因型之间甚至不同物种之间的杂交通常用于植物育种计划。互惠杂种是通过改变杂交中亲本基因型的交叉方向(或性角色)获得的。这些杂种之间的表型差异构成互惠效应(REs)。本研究的目的是评估三个种间和种内互交中番茄果实性状和 DNA 甲基化谱的表型差异。在分析的 16 种水果性状中,有 13 种检测到 RE。具有 REs 的性状数量在种间杂交中最少,而在来自同一种间杂交的重组自交系 (RIL) 之间的杂交中发现最多。有人提出了基因作用分析的扩展,以纳入起源父母效应 (POE)。在四个果实性状中发现了母系和父系优势。发现位于编码区和非编码区的表位具有REs和父系遗传。互惠杂种显示的表观遗传同一性解释了它们之间的表型差异,表明DNA甲基化可能是POEs中涉及的机制之一。

更新日期:2020-10-20
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