scholarly journals Unidirectional response to bidirectional selection on body size II. Quantitative genetics

2020 ◽  
Vol 10 (20) ◽  
pp. 11453-11466
Author(s):  
Arnaud Le Rouzic ◽  
Clémentine Renneville ◽  
Alexis Millot ◽  
Simon Agostini ◽  
David Carmignac ◽  
...  
Keyword(s):  
Body Size ◽  
Quantitative Genetics ◽  
Bidirectional Selection

scholarly journals SEASONALLY VARYING DIET QUALITY AND THE QUANTITATIVE GENETICS OF DEVELOPMENT TIME AND BODY SIZE IN BIRCH FEEDING INSECTS

Evolution ◽  
2001 ◽  
Vol 55 (10) ◽  
pp. 1992-2001 ◽  
Author(s):  
Antti Kause ◽  
Irma Saloniemi ◽  
Jean-Philippe Morin ◽  
Erkki Haukioja ◽  
Sinikka Hanhimäki ◽  
...  
Keyword(s):  
Body Size ◽  
Quantitative Genetics ◽  
Diet Quality ◽  
Development Time

The quantitative genetics of sexual selection in the dung fly Sepsis cynipsea

Behaviour ◽  
2004 ◽  
Vol 141 (3) ◽  
pp. 327-341 ◽  
Author(s):  
Wolf Blanckenhorn ◽  
Claudia Mühlhäuser
Keyword(s):  
Sexual Selection ◽  
Body Size ◽  
Genetic Correlation ◽  
Quantitative Genetics ◽  
Sexual Conflict ◽  
Good Genes ◽  
Male Body ◽  
Selection Models ◽  
Sexually Selected Traits ◽  
Mating Cost

AbstractIn the common dung or black scavenger fly Sepsis cynipsea (Diptera: Sepsidae) several morphological and behavioural male and female traits interact during mating. Previous studies show that males attempt to mount females without courtship, females use vigorous shaking behaviour in response to male mounting, the duration of shaking is an indicator of both direct and indirect female choice and sexual conflict, and larger males enjoy a mating advantage. We conducted a quantitative genetic paternal half sib study to investigate the genetic underpinnings of these traits, notably body size (the preferred trait) and the associated female preference, and to assess the relative importance of various models generally proposed to account for the evolution of sexually selected traits. Several morphological traits and female shaking duration were heritable, thus meeting a key requirement of all sexual selection models. In contrast, two traits indicative of male persistence in mating were not. Male longevity was also heritable and negatively correlated with his mating effort, suggesting a mating cost. However, the crucial genetic correlation between male body size and female shaking duration, predicted to be negative by both 'good genes' and Fisherian models and positive by the sexual conflict (or chase-away) model, was zero. This could be because of low power, or because of constraints imposed by the genetic correlation structure. Based on our rsults we conclude that discriminating sexual selection models by sole means of quantitative genetics is difficult, if not impossible.

SEASONALLY VARYING DIET QUALITY AND THE QUANTITATIVE GENETICS OF DEVELOPMENT TIME AND BODY SIZE IN BIRCH FEEDING INSECTS

Evolution ◽  
2001 ◽  
Vol 55 (10) ◽  
pp. 1992 ◽  
Author(s):  
Antti Kause ◽  
Irma Saloniemi ◽  
Jean-Philippe Morin ◽  
Erkki Haukioja ◽  
Sinikka Hanhimäki ◽  
...  
Keyword(s):  
Body Size ◽  
Quantitative Genetics ◽  
Diet Quality ◽  
Development Time

scholarly journals Unidirectional response to bidirectional selection on body size. I. Phenotypic, life history and endocrine response.

Authorea ◽  
2020 ◽  
Author(s):  
Cl mentine Renneville ◽  
Alexis Millot ◽  
Simon Agostini ◽  
David Carmignac ◽  
Gersende Maugars ◽  
...  
Keyword(s):  
Life History ◽  
Body Size ◽  
Endocrine Response ◽  
Bidirectional Selection

scholarly journals Quantitative Genetics of Vector Competence for La Crosse Virus and Body Size inOchlerotatus hendersoniandOchlerotatus triseriatusInterspecific Hybrids

Genetics ◽  
2005 ◽  
Vol 169 (3) ◽  
pp. 1529-1539 ◽  
Author(s):  
Justin R. Anderson ◽  
Jennifer R. Schneider ◽  
Paul R. Grimstad ◽  
David W. Severson
Keyword(s):  
Body Size ◽  
Quantitative Genetics ◽  
Vector Competence ◽  
La Crosse Virus

scholarly journals Quantitative genetics of body size evolution on islands: an individual-based simulation approach

2019 ◽  
Vol 15 (10) ◽  
pp. 20190481 ◽  
Author(s):  
José Alexandre F. Diniz-Filho ◽  
Lucas Jardim ◽  
Thiago F. Rangel ◽  
Phillip B. Holden ◽  
Neil R. Edwards ◽  
...  
Keyword(s):  
Body Size ◽  
Quantitative Genetics ◽  
Evolutionary Genetics ◽  
Simulation Approach ◽  
Island Rule ◽  
Size Change ◽  
Evolutionary Patterns ◽  
New Developments ◽  
Size Evolution ◽  
Individual Based Simulation

According to the island rule, small-bodied vertebrates will tend to evolve larger body size on islands, whereas the opposite happens to large-bodied species. This controversial pattern has been studied at the macroecological and biogeographical scales, but new developments in quantitative evolutionary genetics now allow studying the island rule from a mechanistic perspective. Here, we develop a simulation approach based on an individual-based model to model body size change on islands as a progressive adaptation to a moving optimum, determined by density-dependent population dynamics. We applied the model to evaluate body size differentiation in the pigmy extinct hominin Homo floresiensis, showing that dwarfing may have occurred in only about 360 generations (95% CI ranging from 150 to 675 generations). This result agrees with reports suggesting rapid dwarfing of large mammals on islands, as well as with the recent discovery that small-sized hominins lived in Flores as early as 700 kyr ago. Our simulations illustrate the power of analysing ecological and evolutionary patterns from an explicit quantitative genetics perspective.

scholarly journals Decomposing phenotypic skew and its effects on the predicted response to strong selection

2021 ◽  
Author(s):  
Joel L Pick ◽  
Hannah Lemon ◽  
Caroline Elizabeth Thomson ◽  
Jarrod Hadfield
Keyword(s):  
Body Size ◽  
Environmental Factors ◽  
Quantitative Genetics ◽  
Selection Response ◽  
Evolutionary Change ◽  
Directional Selection ◽  
The Body ◽  
Cyanistes Caeruleus ◽  
The Impact ◽  
Blue Tits

The major frameworks for predicting evolutionary change assume that a phenotype's underlying genetic and environmental components are normally distributed. However, the predictions of these frameworks may no longer hold if distributions are skewed. Despite this, phenotypic skew has never been decomposed, meaning the fundamental assumptions of quantitative genetics remain untested. Here, we demonstrate that the substantial phenotypic skew in the body size of juvenile blue tits (Cyanistes caeruleus) is driven by environmental factors. Although skew had little impact on our predictions of selection response in this case, our results highlight the impact of skew on the estimation of inheritance and selection. Specifically, the non-linear parent-offspring regressions induced by skew, alongside selective disappearance, can strongly bias estimates of heritability. The ubiquity of skew and strong directional selection on juvenile body size implies that heritability is commonly overestimated, which may in part explain the discrepancy between predicted and observed trait evolution.

scholarly journals Evolutionary quantitative genetics of juvenile body size in a population of feral horses reveals sexually antagonistic selection

2019 ◽  
Vol 33 (4) ◽  
pp. 567-584
Author(s):  
Charlotte E. Regan ◽  
Laura A. Tuke ◽  
Julie Colpitts ◽  
Philip D. McLoughlin ◽  
Alastair J. Wilson ◽  
...  
Keyword(s):  
Body Size ◽  
Quantitative Genetics ◽  
Feral Horses ◽  
Antagonistic Selection ◽  
Sexually Antagonistic Selection

scholarly journals Unidirectional response to bidirectional selection on body size II Quantitative genetics

2020 ◽  
Author(s):  
Arnaud Le Rouzic ◽  
Clémentine Renneville ◽  
Alexis Millot ◽  
Simon Agostini ◽  
David Carmignac ◽  
...  
Keyword(s):  
Life History ◽  
Body Size ◽  
Body Length ◽  
Quantitative Genetics ◽  
Artificial Selection ◽  
Life History Traits ◽  
Random Effect ◽  
Control Line ◽  
Early Maturity ◽  
And Control

AbstractAnticipating the genetic and phenotypic changes induced by natural or artificial selection requires reliable estimates of trait evolvabilities (genetic variances and covariances). However, whether or not multivariate quantitative genetics models are able to predict precisely the evolution of traits of interest, especially fitness-related, life-history traits, remains an open empirical question. Here, we assessed to what extent the response to bivariate artificial selection on both body size and maturity in the medaka Oryzias latipes, a model fish species, fits the theoretical predictions. Three lines (Large, Small, and Control lines) were differentially selected for body length at 75 days of age, conditional on maturity. As maturity and body size were phenotypically correlated, this selection procedure generated a bi-dimensional selection pattern on two life history traits. After removal of non-heritable trends and noise with a random effect (’animal’) model, the observed selection response did not match the expected bidirectional response. For body size, Large and Control lines responded along selection gradients (larger body size and stasis, respectively), but, surprisingly, the Small did not evolve a smaller body length, and remained identical to the Control line throughout the experiment. The magnitude of the empirical response was smaller than the theoretical prediction in both selected directions. For maturity, the response was opposite to the expectation (the Large line evolved late maturity compared to the Control line, while the Small line evolved early maturity, while the opposite pattern was predicted due to the strong positive genetic correlation between both traits). The mismatch between predicted and observed response was substantial and could not be explained by usual sources of uncertainties (including sampling effects, genetic drift, and error in G matrix estimates).

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