The regulation of parental genome dosage is of fundamental importance in animals and plants, as exemplified by X-chromosome inactivation and dosage compensation. The 'triploid block' is a classic example of dosage regulation in plants that establishes a reproductive barrier between species differing in chromosome number. This barrier acts in the embryo-nourishing endosperm tissue and induces the abortion of hybrid seeds through a yet unknown mechanism . Here we show that depletion of paternal epigenetically activated small interfering RNAs (easiRNAs) bypasses the triploid block in response to increased paternal ploidy in Arabidopsis thaliana. Paternal loss of the plant-specific RNA polymerase IV suppressed easiRNA formation and rescued triploid seeds by restoring small-RNA-directed DNA methylation at transposable elements (TEs), correlating with reduced expression of paternally expressed imprinted genes (PEGs). Our data suggest that easiRNAs form a quantitative signal for paternal chromosome number and that their balanced dosage is required for post-fertilization genome stability and seed viability.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1038/s41588-017-0033-4 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Clinical features and molecular genetics of patients with RASopathies: expanding the phenotype with rare genes and novel variants.
Eur J Pediatr
December 2024
Department of Medical Genetics, Dr. Behçet Uz Children's Hospital, Izmir, Turkey.
Unlabelled: The RASopathies are a group of disorders resulting from a germline variant in the genes encoding the Ras/mitogen-activated protein kinase pathway. These disorders include Noonan syndrome (NS), cardiofaciocutaneous syndrome (CFC), Costello syndrome (CS), Legius syndrome (LS), and neurofibromatosis type 1 (NF1), and have overlapping clinical features due to RAS/MAPK dysfunction. In this study, we aimed to describe the clinical and molecular features of patients exhibiting phenotypic manifestations consistent with RASopathies.
View Article and Find Full Text PDFGenotyping-by-sequencing uncovers a Thinopyrum 4StS·1JS Robertsonian translocation linked to multiple stress tolerances in bread wheat.
Theor Appl Genet
December 2024
Hungarian Research Network (HUN-REN), Centre for Agricultural Research, Agricultural Institute, Martonvásár, 2462, Hungary.
GBS read coverage analysis identified a Robertsonian chromosome from two Thinopyrum subgenomes in wheat, conferring leaf and stripe rust resistance, drought tolerance, and maintaining yield stability. Agropyron glael (GLAEL), a Thinopyrum intermedium × Th. ponticum hybrid, serves as a valuable genetic resource for wheat improvement.
View Article and Find Full Text PDFPrognostic importance of direct assignment of parent-of-origin via long-read genome and epigenome sequencing in retinoblastoma.
JCI Insight
December 2024
Department of Ophthalmology and Roger and Karalis Johnson Retina Center, University of Washington, Seattle, United States of America.
Background: Current clinical sequencing methods cannot effectively detect DNA methylation and allele-specific variation to provide parent-of-origin information from the proband alone. Parent-of-origin effects can lead to differential disease and the inability to assign this in de novo cases limits prognostication in the majority of affected individuals with retinoblastoma, a hereditary cancer with suspected parent-of-origin effects.
Methods: To directly assign parent-of-origin in retinoblastoma patients, genomic DNA was extracted from blood samples for sequencing using a programmable, targeted single-molecule long-read DNA genomic and epigenomic approach.
Genetic Diagnostics and Phenotypic Profiling of a Girl With Autosomal Recessive Intellectual Developmental Disorder and Autism.
Cureus
November 2024
Laboratory of Genomic Medicine, GHC Genetics SK Ltd. Science Park, Comenius University in Bratislava, Bratislava, SVK.
In this article, we present a case study of a five-year-old girl with autism and developmental delay, conducted at the Academic Center for Autism Research in Bratislava, Slovakia. The girl was diagnosed using Autism Diagnostic Observation Schedule-Second Edition (ADOS-2) and Autism Diagnostic Interview-Revised (ADI-R) instruments and met the criteria for autism spectrum disorder. Intellectual functioning was in the markedly below-average range, as indicated by the Snijders-Oomen Nonverbal Intelligence Test-Revised (SON-R) examination, and her level of adaptive functioning was significantly reduced.
View Article and Find Full Text PDFCytogenetic features of intergeneric amphydiploids and genome-substituted forms of wheat.
Vavilovskii Zhurnal Genet Selektsii
November 2024
Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia.
Synthetic intergeneric amphydiploids and genome-substituted wheat forms are an important source for transferring agronomically valuable genes from wild species into the common wheat (Triticum aestivum L.) genome. They can be used both in academic research and for breeding purposes as an original material for developing wheat-alien addition and substitution lines followed by translocation induction with the aid of irradiation or nonhomologous chromosome pairing.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!