scholarly journals Contrasting GC-content dynamics across 33 mammalian genomes: Relationship with life-history traits and chromosome sizes

2010 ◽  
Vol 20 (8) ◽  
pp. 1001-1009 ◽  
Author(s):  
J. Romiguier ◽  
V. Ranwez ◽  
E. J. P. Douzery ◽  
N. Galtier
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Gc Content ◽  
Mammalian Genomes

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

scholarly journals Impact of mating systems on patterns of sequence polymorphism in flowering plants

2006 ◽  
Vol 273 (1604) ◽  
pp. 3011-3019 ◽  
Author(s):  
Sylvain Glémin ◽  
Eric Bazin ◽  
Deborah Charlesworth
Keyword(s):  
Life History ◽  
Genome Evolution ◽  
Mating Systems ◽  
Life History Traits ◽  
Gc Content ◽  
Sequence Polymorphism ◽  
Effective Population ◽  
Recombination Rates ◽  
Woody Perennial ◽  
Evolutionary Changes

A fundamental challenge in population genetics and molecular evolution is to understand the forces shaping the patterns of genetic diversity within and among species. Among them, mating systems are thought to have important influences on molecular diversity and genome evolution. Selfing is expected to reduce effective population size, N e , and effective recombination rates, directly leading to reduced polymorphism and increased linkage disequilibrium compared with outcrossing. Increased isolation between populations also results directly from selfing or indirectly from evolutionary changes, such as small flowers and low pollen output, leading to greater differentiation of molecular markers than under outcrossing. The lower effective recombination rate increases the likelihood of hitch-hiking, further reducing within-deme diversity of selfers and thus increasing their genetic differentiation. There are also indirect effects on molecular evolutionary processes. Low N e reduces the efficacy of selection; in selfers, selection should thus be less efficient in removing deleterious mutations. The rarity of heterozygous sites in selfers leads to infrequent action of biased conversion towards GC, which tends to increase sequences' GC content in the most highly recombining genome regions of outcrossers. To test these predictions in plants, we used a newly developed sequence polymorphism database to investigate the effects of mating system differences on sequence polymorphism and genome evolution in a wide set of plant species. We also took into account other life-history traits, including life form (whether annual or perennial herbs, and woody perennial) and the modes of pollination and seed dispersal, which are known to affect enzyme and DNA marker polymorphism. We show that among various life-history traits, mating systems have the greatest influence on patterns of polymorphism.

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.

DO VARIATIONS IN SUBSTITUTION RATES AND MALE MUTATION BIAS CORRELATE WITH LIFE-HISTORY TRAITS? A STUDY OF 32 MAMMALIAN GENOMES

Evolution ◽  
2011 ◽  
Vol 65 (10) ◽  
pp. 2800-2815 ◽  
Author(s):  
Melissa A. Wilson Sayres ◽  
Chris Venditti ◽  
Mark Pagel ◽  
Kateryna D. Makova
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Mutation Bias ◽  
Substitution Rates ◽  
Mammalian Genomes ◽  
Male Mutation Bias

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.

Life History Traits in a Population of Pelobates syriacus (Boettger, 1889) from Turkey

2020 ◽  
Vol 27 (4) ◽  
pp. 195-200
Author(s):  
Ufuk Bülbül ◽  
Halime Koç ◽  
Yasemin Odabaş ◽  
Ali İhsan Eroğlu ◽  
Muammer Kurnaz ◽  
...  
Keyword(s):  
Life History ◽  
Age Structure ◽  
Life History Traits ◽  
Spadefoot Toad ◽  
Males And Females

Age structure of the eastern spadefoot toad, Pelobates syriacus from the Kızılırmak Delta (Turkey) were assessed using phalangeal skeletochronology. Snout-vent length (SVL) ranged from 42.05 to 86.63 mm in males and 34.03 to 53.27 mm in females. Age of adults ranged from 2 to 8 years in males and 3 to 5 years in females. For both sexes, SVL was significantly correlated with age. Males and females of the toads reached maturity at 2 years of age.

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