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Literature DB >> 21266545

Changes in 24-nt siRNA levels in Arabidopsis hybrids suggest an epigenetic contribution to hybrid vigor.

Michael Groszmann¹, Ian K Greaves, Zayed I Albertyn, Graham N Scofield, William J Peacock, Elizabeth S Dennis.

Abstract

Intraspecific hybrids between the Arabidopsis thaliana accessions C24 and Landsberg erecta have strong heterosis. The reciprocal hybrids show a decreased level of 24-nt small RNA (sRNA) relative to the parents with the decrease greatest for those loci where the parents had markedly different 24-nt sRNA levels. The genomic regions with reduced 24-nt sRNA levels were largely associated with genes and their flanking regions indicating a potential effect on gene expression. We identified several examples of genes with altered 24-nt sRNA levels that showed correlated changes in DNA methylation and expression levels. We suggest that such epigenetically generated differences in gene activity may contribute to hybrid vigor and that the epigenetic diversity between ecotypes provides increased allelic (epi-allelic) variability that could contribute to heterosis.

Entities: Species

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Year: 2011 PMID： 21266545 PMCID： PMC3038704 DOI： 10.1073/pnas.1019217108

Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN： 0027-8424 Impact factor: 11.205

35 in total

1. The late flowering phenotype of fwa mutants is caused by gain-of-function epigenetic alleles of a homeodomain gene.

Authors: W J Soppe; S E Jacobsen; C Alonso-Blanco; J P Jackson; T Kakutani; M Koornneef; A J Peeters
Journal: Mol Cell Date: 2000-10 Impact factor: 17.970

2. Classical genetic and quantitative trait loci analyses of heterosis in a maize hybrid between two elite inbred lines.

Authors: Elisabetta Frascaroli; Maria Angela Canè; Pierangelo Landi; Giorgio Pea; Luca Gianfranceschi; Marzio Villa; Michele Morgante; Mario Enrico Pè
Journal: Genetics Date: 2007-03-04 Impact factor: 4.562

Review 3. Epigenetic inheritance in plants.

Authors: Ian R Henderson; Steven E Jacobsen
Journal: Nature Date: 2007-05-24 Impact factor: 49.962

4. Genetic analysis of heterosis for yield and yield components in rapeseed (Brassica napus L.) by quantitative trait locus mapping.

Authors: Mladen Radoev; Heiko C Becker; Wolfgang Ecke
Journal: Genetics Date: 2008-06-18 Impact factor: 4.562

Changes in 24-nt siRNA levels in Arabidopsis hybrids suggest an epigenetic contribution to hybrid vigor.

1. The late flowering phenotype of fwa mutants is caused by gain-of-function epigenetic alleles of a homeodomain gene.

2. Classical genetic and quantitative trait loci analyses of heterosis in a maize hybrid between two elite inbred lines.

Review 3. Epigenetic inheritance in plants.

4. Genetic analysis of heterosis for yield and yield components in rapeseed (Brassica napus L.) by quantitative trait locus mapping.

5. Highly integrated single-base resolution maps of the epigenome in Arabidopsis.

Review 6. Towards the molecular basis of heterosis.

7. Tandem repeats upstream of the Arabidopsis endogene SDC recruit non-CG DNA methylation and initiate siRNA spreading.

8. Locus-specific control of asymmetric and CpNpG methylation by the DRM and CMT3 methyltransferase genes.

9. Genome-wide profiling and analysis of Arabidopsis siRNAs.

10. Small RNA-directed epigenetic natural variation in Arabidopsis thaliana.

1. On epigenetics and epistasis: hybrids and their non-additive interactions.

Review 2. Natural variation in Arabidopsis: from molecular genetics to ecological genomics.

3. Trans chromosomal methylation in Arabidopsis hybrids.

4. A global view of hybrid vigor: DNA methylation, small RNAs, and gene expression.

5. Maternal siRNAs as regulators of parental genome imbalance and gene expression in endosperm of Arabidopsis seeds.

6. Repeat associated small RNAs vary among parents and following hybridization in maize.

7. Hybrid mimics and hybrid vigor in Arabidopsis.

8. Dicer-independent RNA-directed DNA methylation in Arabidopsis.

9. A non-additive interaction in a single locus causes a very short root phenotype in wheat.

10. Protein-coding cis-natural antisense transcripts have high and broad expression in Arabidopsis.