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Arabidopsis arenosa x Arabidopsis thaliana

ABSTRACT: Arabidopsis arenosa x Arabidopsis thaliana Transcriptome or Gene expression

PROVIDER: PRJNA1262884 | ENA |

REPOSITORIES: ENA

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Interspecies hybridization between Arabidopsis thaliana and Arabidopsis arenosa

Project description:Hybrid matings between A. thaliana and A. arenosa result in post zygotic seed lethality resulting in hybridization barrier between the two species. This barrier can be overcome to a large degree by increasing the genome dosage of the maternal genome (i.e. A. thaliana) in a cross between the two species. In this experiment we assayed the transcriptome of an incompatible cross (2x At x 2x Aa) with high seed lethality and a compatible cross (4x At x 2x Aa) using silique tissue at 5 days after pollination. We used microarrays to identify dosage responsive gene in interspecies hybridization Keywords: differential expression

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Comparative genomic hybridization by array of Arabidopsis thaliana, Arabidopsis suecica, Arabidopsis arenosa and frankenfurter shows homeolog-specific retention in allotetraploid Arabidopsis suecica

Project description:Hybridization to Affymetrix tiling array Ath 1.0R performed using gDNA from Arabidopsis arenosa var. Care-1, Arabidopsis thaliana var 4x Ler, Arabidopsis suecica var. Sue-1, and F1 hybrids between A. thaliana var 4x Ler and A. arenosa var. Care-1

2011-01-01 | E-MEXP-2969 | biostudies-arrayexpress

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Cis- and trans- regulatory divergence between progenitor species determines gene-expression novelty in Arabidopsis allopolyploids

Project description:Gene-expression divergence between species shapes morphological evolution, but the molecular basis is largely unknown. Here we show cis- and trans-regulatory elements and chromatin modifications on gene-expression diversity in genetically tractable Arabidopsis allotetraploids. In Arabidopsis thaliana and Arabidopsis arenosa, both cis and trans with predominant cis-regulatory effects mediate gene-expression divergence. The majority of genes with both cis- and trans-effects are subjected to compensating interactions and stabilizing selection. Interestingly, chromatin modifications correlate with cis - and trans -regulation. In F1 allotetraploids, Arabidopsis arenosa trans factors predominately affect allelic expression divergence. Arabidopsis arenosa trans factors tend to upregulate Arabidopsis thaliana alleles, whereas Arabidopsis thaliana trans factors up- or down-regulate Arabidopsis arenosa alleles. In resynthesized and natural allotetraploids, trans effects drive expression of both homoeologous loci into the same direction. We provide evidence for natural selection and chromatin regulation in shaping gene-expression diversity during plant evolution and speciation.

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