Homology-Based Interactions between Small RNAs and Their Targets Control Dominance Hierarchy of Male Determinant Alleles of Self-Incompatibility in Arabidopsis lyrata

Self-incompatibility (SI) is conserved among members of the Brassicaceae plant family. This trait is controlled epigenetically by the dominance hierarchy of the male determinant alleles. We previously demonstrated that a single small RNA (sRNA) gene is sufficient to control the linear dominance hier...

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Published inInternational journal of molecular sciences Vol. 22; no. 13; p. 6990
Main Authors Yasuda, Shinsuke, Kobayashi, Risa, Ito, Toshiro, Wada, Yuko, Takayama, Seiji
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 29.06.2021
MDPI
Subjects
Alleles
Arabidopsis lyrata
Brassicaceae
DNA methylation
Dominance
Dominance hierarchies
dominance hierarchy
epigenetics
Haplotypes
Homology
Incompatibility
Kinases
MicroRNAs
Model testing
Self-incompatibility
small RNA
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Summary:Self-incompatibility (SI) is conserved among members of the Brassicaceae plant family. This trait is controlled epigenetically by the dominance hierarchy of the male determinant alleles. We previously demonstrated that a single small RNA (sRNA) gene is sufficient to control the linear dominance hierarchy in Brassica rapa and proposed a model in which a homology-based interaction between sRNAs and target sites controls the complicated dominance hierarchy of male SI determinants. In Arabidopsis halleri, male dominance hierarchy is reported to have arisen from multiple networks of sRNA target gains and losses. Despite these findings, it remains unknown whether the molecular mechanism underlying the dominance hierarchy is conserved among Brassicaceae. Here, we identified sRNAs and their target sites that can explain the linear dominance hierarchy of Arabidopsis lyrata, a species closely related to A. halleri. We tested the model that we established in Brassica to explain the linear dominance hierarchy in A. lyrata. Our results suggest that the dominance hierarchy of A. lyrata is also controlled by a homology-based interaction between sRNAs and their targets.
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These authors contributed equally to this work.
Present address: Plant Breeding and Experiment Station, Takii and Company, Limited, Konan, Shiga 520-3231, Japan.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms22136990