Correlated evolution of larval development, egg size, and genome size across two genera of snapping shrimp

2021 ◽  
Author(s):  
Kristin M. Hultgren ◽  
S.T.C. Chak ◽  
J. Bjelajac ◽  
K.S. Macdonald
Keyword(s):  
Larval Development ◽  
Genome Size ◽  
Egg Size ◽  
Correlated Evolution ◽  
Snapping Shrimp

scholarly journals Genome size correlates with reproductive fitness in seed beetles

2015 ◽  
Vol 282 (1815) ◽  
pp. 20151421 ◽  
Author(s):  
Göran Arnqvist ◽  
Ahmed Sayadi ◽  
Elina Immonen ◽  
Cosima Hotzy ◽  
Daniel Rankin ◽  
...  
Keyword(s):  
Life History ◽  
Natural Selection ◽  
Genome Size ◽  
Evolutionary Biology ◽  
Large Scale ◽  
Life History Traits ◽  
Single Species ◽  
Reproductive Fitness ◽  
Correlated Evolution ◽  
Seed Beetles

The ultimate cause of genome size (GS) evolution in eukaryotes remains a major and unresolved puzzle in evolutionary biology. Large-scale comparative studies have failed to find consistent correlations between GS and organismal properties, resulting in the ‘ C -value paradox’. Current hypotheses for the evolution of GS are based either on the balance between mutational events and drift or on natural selection acting upon standing genetic variation in GS. It is, however, currently very difficult to evaluate the role of selection because within-species studies that relate variation in life-history traits to variation in GS are very rare. Here, we report phylogenetic comparative analyses of GS evolution in seed beetles at two distinct taxonomic scales, which combines replicated estimation of GS with experimental assays of life-history traits and reproductive fitness. GS showed rapid and bidirectional evolution across species, but did not show correlated evolution with any of several indices of the relative importance of genetic drift. Within a single species, GS varied by 4–5% across populations and showed positive correlated evolution with independent estimates of male and female reproductive fitness. Collectively, the phylogenetic pattern of GS diversification across and within species in conjunction with the pattern of correlated evolution between GS and fitness provide novel support for the tenet that natural selection plays a key role in shaping GS evolution.

scholarly journals Correlated evolution of LTR retrotransposons and genome size in the genus eleocharis

2010 ◽  
Vol 10 (1) ◽  
pp. 265 ◽  
Author(s):  
František Zedek ◽  
Jakub Šmerda ◽  
Petr Šmarda ◽  
Petr Bureš
Keyword(s):  
Genome Size ◽  
Ltr Retrotransposons ◽  
Correlated Evolution

scholarly journals Correlated evolution of genome size and seed mass

2006 ◽  
Vol 173 (2) ◽  
pp. 422-437 ◽  
Author(s):  
Jeremy M. Beaulieu ◽  
Angela T. Moles ◽  
Ilia J. Leitch ◽  
Michael D. Bennett ◽  
John B. Dickie ◽  
...  
Keyword(s):  
Genome Size ◽  
Seed Mass ◽  
Correlated Evolution

scholarly journals CORRELATED EVOLUTION OF GENOME SIZE AND CELL VOLUME IN DIATOMS (BACILLARIOPHYCEAE)

2008 ◽  
Vol 44 (1) ◽  
pp. 124-131 ◽  
Author(s):  
Jessica A. Connolly ◽  
Matthew J. Oliver ◽  
Jeremy M. Beaulieu ◽  
Charles A. Knight ◽  
Lars Tomanek ◽  
...  
Keyword(s):  
Cell Volume ◽  
Genome Size ◽  
Correlated Evolution

scholarly journals Linking genome size variation to population phenotypic variation within the rotifer, Brachionus asplanchnoidis

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Claus-Peter Stelzer ◽  
Maria Pichler ◽  
Anita Hatheuer
Keyword(s):  
Embryonic Development ◽  
Genome Size ◽  
Genomic Dna ◽  
Egg Size ◽  
Development Time ◽  
Size Variation ◽  
Conclusive Evidence ◽  
Heritable Variation ◽  
Genome Size Variation ◽  
Mutational Change

AbstractEukaryotic organisms usually contain much more genomic DNA than expected from their biological complexity. In explaining this pattern, selection-based hypotheses suggest that genome size evolves through selection acting on correlated life history traits, implicitly assuming the existence of phenotypic effects of (extra) genomic DNA that are independent of its information content. Here, we present conclusive evidence of such phenotypic effects within a well-mixed natural population that shows heritable variation in genome size. We found that genome size is positively correlated with body size, egg size, and embryonic development time in a population of the monogonont rotifer Brachionus asplanchnoidis. The effect on embryonic development time was mediated partly by an indirect effect (via egg size), and a direct effect, the latter indicating an increased replication cost of the larger amounts of DNA during mitosis. Our results suggest that selection-based change of genome size can operate in this population, provided it is strong enough to overcome drift or mutational change of genome size.

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