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The Capsella rubella genome and the genomic consequences of rapid mating system evolution
The transition to selfing may be typified by parallel shifts in gene expression, along with a measurable reduction of purifying selection, similar to that seen in Arabidopsis, which self fertilization evolved about 1 million years ago.
Hybrid origins and the earliest stages of diploidization in the highly successful recent polyploid Capsella bursa-pastoris
- G. Douglas, Gesseca Gos, S. Wright
- BiologyProceedings of the National Academy of Sciences
- 17 February 2015
The results suggest that the earliest stages of diploidization are associated with quantitative genome-wide decreases in the strength and efficacy of selection rather than rapid gene loss, and that nonfunctionalization can receive a “head start” through a legacy of deleterious variants and differential expression originating in parental diploids populations.
Mating system shifts and transposable element evolution in the plant genus Capsella
The results suggest that the evolution of selfing may have different effects on TE evolution on a short and on a long timescale, and cross-species comparisons of transposon abundance are sensitive to reference genome bias, and efforts to control for this bias are key when making comparisons across species.
No evidence that sex and transposable elements drive genome size variation in evening primroses
- J. Ågren, S. Greiner, Marc T. J. Johnson, S. Wright
- BiologyEvolution; international journal of organic…
- 1 April 2015
It is found that variation in sexual/asexual reproduction cannot explain the almost twofold variation in genome size and, using whole genome sequences, it was found that genome size was not associated with TE abundance; instead the larger genomes had a higher abundance of simple sequence repeats.
- J. Ågren
- BiologyThe Gene's-Eye View of Evolution
- 21 July 2021
This chapter traces the origins of the gene’s-eye view through three sections of evolutionary biology, showing how adaptationism, the tradition that takes the appearance of design in living world to be the cardinal problem a theory of evolution needs to explain, has been especially prominent in British biology.
Transposable element evolution in the allotetraploid Capsella bursa-pastoris.
The lack of a genomewide effect of allopolyploidy on TE abundance, combined with the increases TE abundance in gene-rich regions, suggests that relaxed selection rather than hybrid breakdown of host silencing explains the TE accumulation in C. bursa-pastoris.
Coevolution of Genome Architecture and Social Behavior.
Sexual conflict through mother's curse and father's curse.
Chromosomal Distribution of Cytonuclear Genes in a Dioecious Plant with Sex Chromosomes
The coordination between nuclear and organellar genes is essential to many aspects of eukaryotic life, including basic metabolism, energy production, and ultimately, organismal fitness. Although…