Life-history traits display strong associations to genome size in annelids

Hydrobiologia ◽  
2021 ◽  
Vol 848 (4) ◽  
pp. 799-810
Author(s):  
Nicholas Beaudreau ◽  
Gloria Massamba-N’Siala ◽  
Claude Belzile ◽  
Piero Calosi ◽  
France Dufresne
Keyword(s):  
Life History ◽  
Genome Size ◽  
Life History Traits

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 Diversity in genome size and GC content shows adaptive potential in orchids and is closely linked to partial endoreplication, plant life‐history traits and climatic conditions

2019 ◽  
Vol 224 (4) ◽  
pp. 1642-1656 ◽  
Author(s):  
Pavel Trávníček ◽  
Martin Čertner ◽  
Jan Ponert ◽  
Zuzana Chumová ◽  
Jana Jersáková ◽  
...  
Keyword(s):  
Life History ◽  
Genome Size ◽  
Life History Traits ◽  
Gc Content ◽  
Climatic Conditions ◽  
Adaptive Potential ◽  
Plant Life

Genome size is not related to life-history traits in primates

Genome ◽  
2005 ◽  
Vol 48 (2) ◽  
pp. 273-278 ◽  
Author(s):  
Serge Morand ◽  
Robert E Ricklefs
Keyword(s):  
Life History ◽  
Body Size ◽  
Genome Size ◽  
Dna Content ◽  
Sexual Maturity ◽  
Life History Traits ◽  
Age At Maturity ◽  
Brain Mass ◽  
Gestation Time ◽  
C Value

Genome size (C value, the haploid DNA content of the nucleus) varies widely among eukaryotes, increasing through duplication or insertion of transposable elements and decreasing through deletions. Here, we investigate relationships between genome size and life-history attributes potentially related to fitness, including body mass, brain mass, gestation time, age at sexual maturity, and longevity, in 42 species of primates. Using multivariate and phylogenetically informed analyses, we show that genome size is unrelated to any of these traits. Genome size exhibits little variation within primates and its evolution does not appear to be correlated with changes in life-history traits. This further indicates that the phenotypic consequences of variation in genome size are dependent on the particular biology of the group in question.Key words: age at maturity, body size, brain mass, C value, genome size, gestation time, life history, primate.

Genome size variation is associated with life‐history traits in birds

2020 ◽  
Vol 310 (4) ◽  
pp. 255-260
Author(s):  
J. P. Yu ◽  
W. Liu ◽  
C. L. Mai ◽  
W. B. Liao
Keyword(s):  
Life History ◽  
Genome Size ◽  
Life History Traits ◽  
Size Variation ◽  
Genome Size Variation

Investigating the role of life-history traits in mammalian genomes

2020 ◽  
Vol 70 (2) ◽  
pp. 121-130 ◽  
Author(s):  
Yun Tang ◽  
Chun Lan Mai ◽  
Jian Ping Yu ◽  
Da Yong Li
Keyword(s):  
Life History ◽  
Genome Size ◽  
Life History Traits ◽  
Interspecific Variation ◽  
Evolutionary Patterns ◽  
Genome Size Evolution ◽  
Duplication Events ◽  
Weaning Age ◽  
Mammalian Genomes ◽  
Proximate Causes

Abstract Genome size evolution has intrigued many evolutionary biologists. Ultimately, the reasons that genomes have become large are proliferation of non-coding elements and/or duplication events. The proximate causes are related to phylogeny, life-history traits and environmental factors. Genome size in mammals exhibits little interspecific variation compared with other taxa. The proximate causes and the evolutionary patterns shaped by phylogeny or life-history traits are largely unknown for mammals. Here, with a dataset of 121 species of mammals, we studied the variations of genome size associated with life history using a comparative quantitative analysis. The results showed that the genome size was positively associated with body size, but not with four other life-history traits (i.e., gestation period, weaning age, litter size, and longevity) in these species. For Primates, Rodentia and Chiroptera, the genome size was not correlated with life-history traits. Our results suggest that evolution of a large genome may result from increased cell size and thus facilitate the evolution of large bodies.

Genome size estimates for some oligochaete annelids

2002 ◽  
Vol 80 (8) ◽  
pp. 1485-1489 ◽  
Author(s):  
T Ryan Gregory ◽  
Paul D.N Hebert
Keyword(s):  
Life History ◽  
Genome Size ◽  
Dna Content ◽  
Life History Traits ◽  
Nuclear Dna ◽  
Nuclear Dna Content ◽  
Interspecific Differences ◽  
Parthenogenetic Reproduction ◽  
Size Estimates ◽  
Freshwater Oligochaetes

Haploid genome sizes (C-values) were estimated for 12 species of freshwater oligochaetes (families Naididae and Tubificidae) and 15 species of earthworms (families Lumbricidae and Megascolecidae). Aquatic worms ranged in genome size from about 0.8 to 7.6 pg, while earthworms varied from approximately 0.4 to 1.2 pg. Interspecific differences in nuclear DNA content did not appear to be linked to variation in chromosome number, but there was evidence of cryptopolyploidy in the aquatic worms. No correlations were found between genome size and either body size or life-history traits, although there may be an association between higher DNA content and parthenogenetic reproduction in earthworms.

Prey tell: what quillback rockfish early life history traits reveal about their survival in encounters with juvenile coho salmon

2020 ◽  
Vol 650 ◽  
pp. 7-18 ◽  
Author(s):  
HW Fennie ◽  
S Sponaugle ◽  
EA Daly ◽  
RD Brodeur
Keyword(s):  
Life History ◽  
Early Life ◽  
Life History Traits ◽  
Direct Evidence ◽  
Coho Salmon ◽  
Larval Fish ◽  
Early Life History ◽  
In The Wild ◽  
Otolith Microstructure Analysis ◽  
Pelagic Juvenile

Predation is a major source of mortality in the early life stages of fishes and a driving force in shaping fish populations. Theoretical, modeling, and laboratory studies have generated hypotheses that larval fish size, age, growth rate, and development rate affect their susceptibility to predation. Empirical data on predator selection in the wild are challenging to obtain, and most selective mortality studies must repeatedly sample populations of survivors to indirectly examine survivorship. While valuable on a population scale, these approaches can obscure selection by particular predators. In May 2018, along the coast of Washington, USA, we simultaneously collected juvenile quillback rockfish Sebastes maliger from both the environment and the stomachs of juvenile coho salmon Oncorhynchus kisutch. We used otolith microstructure analysis to examine whether juvenile coho salmon were age-, size-, and/or growth-selective predators of juvenile quillback rockfish. Our results indicate that juvenile rockfish consumed by salmon were significantly smaller, slower growing at capture, and younger than surviving (unconsumed) juvenile rockfish, providing direct evidence that juvenile coho salmon are selective predators on juvenile quillback rockfish. These differences in early life history traits between consumed and surviving rockfish are related to timing of parturition and the environmental conditions larval rockfish experienced, suggesting that maternal effects may substantially influence survival at this stage. Our results demonstrate that variability in timing of parturition and sea surface temperature leads to tradeoffs in early life history traits between growth in the larval stage and survival when encountering predators in the pelagic juvenile stage.

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