THE EFFECT OF A VARIABLE ENVIRONMENT ON THE GENETIC CORRELATION STRUCTURE IN A FIELD CRICKET

@article{Simons1996THEEO,
  title={THE EFFECT OF A VARIABLE ENVIRONMENT ON THE GENETIC CORRELATION STRUCTURE IN A FIELD CRICKET},
  author={Andrew M. Simons and Derek A. Roff},
  journal={Evolution},
  year={1996},
  volume={50}
}
  • A. Simons, D. Roff
  • Published 1 February 1996
  • Biology, Environmental Science
  • Evolution
The evolutionary trajectory of a trait depends not only on the presence of genetic variation, but also on the pattern of genetic correlations (rg) among traits. Genetic correlations are most easily measured under homogeneous, controlled laboratory conditions, whereas natural populations typically experience a higher degree of environmental variability. The effect of environmental variability on genetic correlations in the cricket, Gryllus pennsylvanicus, was studied by measuring genetic… 
The Impact of Environmental Heterogeneity on Genetic Architecture in a Wild Population of Soay Sheep
TLDR
It is demonstrated that the genetic architecture of traits is not stable under temporally varying environments and highlights the fact that evolutionary processes may depend largely upon ecological conditions.
Among-environment heteroscedasticity and the estimation and testing of genetic correlation
TLDR
This is the first demonstration that a variance-stabilizing transformation of the data removes the bias in the estimation of genetic correlation caused by among-environment heteroscedasticity, while allowing valid statistical testing in an ANOVA-based approach.
Environmental quality and evolutionary potential: lessons from wild populations
TLDR
A meta-analysis on recent studies comparing heritability in favourable versus unfavourable conditions in non-domestic and non-laboratory animals provides evidence for increased heritabilityIn more favourable conditions, significantly so for morphometric traits but not for traits more closely related to fitness.
THE EVOLUTION OF GENETIC CORRELATIONS: AN ANALYSIS OF PATTERNS
  • D. Roff
  • Biology
    Evolution; international journal of organic evolution
  • 1996
TLDR
Analysis of the phenotypic and genetic correlations suggest that for the combinations M × M and L × M, but not L × L or B × B, the phenotypesic correlation is an adequate estimate of the genetic correlation.
Testing the phenotypic gambit: phenotypic, genetic and environmental correlations of colour
TLDR
Using a large‐scale cross‐fostering experiment, genetic, common environmental and phenotypic correlations between four colour traits and two skeletal traits in a wild population of passerine birds are measured and it is suggested that this may be common if trade‐offs or substantial parental effects exist.
THE FITNESS OF MANIPULATING PHENOTYPES: IMPLICATIONS FOR STUDIES OF FLUCTUATING ASYMMETRY AND MULTIVARIATE SELECTION
TLDR
The results suggest that assumptions about the relationship between condition and trait values, especially fluctuating asymmetry, cannot be made and studies that use manipulated phenotypes to statistically determine the form of selection must first demonstrate that the pattern of the phenotypic correlation matrix is not itself altered by the manipulation.
Genetic and phenotypic correlations among size-related traits, and heritability variation between body parts in Drosophila buzzatii
TLDR
Although heritability estimates were significant for all traits, heritabilities were higher for thorax-wing traits than for head traits, and the genetic correlation matrix estimated in the relatively homogeneous lab environment is not simply a constant multiplicative factor of the phenotypic correlation matrix estimates in WCF.
The estimation of genetic correlations from phenotypic correlations: a test of Cheverud's conjecture
TLDR
Examination of other data sets of morphological traits suggests that the phenotypic correlation may, in general, be a suitable substitute for the estimated genetic correlation.
ESTIMATING GENETIC CORRELATIONS FROM MEASUREMENTS OF FIELD‐CAUGHT WATERSTRIDERS
TLDR
Results for sample sizes of less than 100 pairs were often unstable or undefined, and even with more than 500 pairs only half of those correlations that had been found to be significant in standard laboratory experiments were statistically significant in this study.
Genetic variance in fitness and its cross‐sex covariance predict adaptation during experimental evolution
TLDR
This study addressed the value of VA for fitness in predicting evolutionary changes over several generations by combining classical quantitative genetics with experimental evolution in the model organism Tribolium castaneum in three new environmental conditions (Dry, Hot, Hot‐Dry).
...
...

References

SHOWING 1-10 OF 36 REFERENCES
THE EFFECT OF ENVIRONMENTAL VARIABILITY ON THE HERITABILITIES OF TRAITS OF A FIELD CRICKET
  • A. Simons, D. Roff
  • Environmental Science
    Evolution; international journal of organic evolution
  • 1994
TLDR
There is no evidence that the increase in the environmental component of variance in the field is any more important in the reduction of h2 than is the decrease in the additive genetic component.
THE MEASUREMENT OF SELECTION ON CORRELATED CHARACTERS
TLDR
Measures of directional and stabilizing selection on each of a set of phenotypically correlated characters are derived, retrospective, based on observed changes in the multivariate distribution of characters within a generation, not on the evolutionary response to selection.
A COMPARISON OF GENETIC AND PHENOTYPIC CORRELATIONS
  • J. Cheverud
  • Biology, Psychology
    Evolution; international journal of organic evolution
  • 1988
TLDR
The analysis of the relationship of genetic‐ and phenotypic‐correlation magnitudes and patterns in 41 pairs of matrices drawn from the literature indicates that squared genetic correlations were on average much higher than squared Phenotypic correlations and that genetic and phenotypesic correlations had only broadly similar patterns.
The Problem of Environment and Selection
TLDR
Formulation of the genotype-environment interaction in terms of a genetic correlation leads easily to a solution of problems connected with selection and a precise answer can be given to the question whether it is better to carry out selection in the environment in which the improved breed is required eventually to live, or in some other environment more favorable to the expression of the desired character.
Natural selection and the heritability of fitness components
TLDR
It is found that the heritability of morphological traits is significantly lower for ectotherms than it is for endotherms which may in part be a result of the strong correlation between life history and body size for many ectotherm.
THE QUANTITATIVE GENETICS OF POLYPHAGY IN AN INSECT HERBIVORE. II. GENETIC CORRELATIONS IN LARVAL PERFORMANCE WITHIN AND AMONG HOST PLANTS
  • S. Via
  • Biology
    Evolution; international journal of organic evolution
  • 1984
Because the overall evolution of the phenotype is a composite of direct and correlated responses to selection, the evolutionary trajectories of genetically correlated characters are fundamentally
CAN ONE PREDICT THE EVOLUTION OF QUANTITATIVE CHARACTERS WITHOUT GENETICS?
TLDR
Cheverud's paper is valuable in emphasizing the great difficulty of estimating genetic parameters and in showing how comparisons of genetic and phenotypic correlations can increase the understanding of morphological integration and the evolution of development.
QUANTITATIVE GENETIC ANALYSIS OF MULTIVARIATE EVOLUTION, APPLIED TO BRAIN:BODY SIZE ALLOMETRY
  • R. Lande
  • Biology
    Evolution; international journal of organic evolution
  • 1979
TLDR
Methods of multivariate analysis, functional analysis and optimality criteria popular among evolutionists, do not account for dynamical constraints imposed by the pattern of genetic variation within populations.
The effect of new environment on adapted genetic architecture
TLDR
In the present study a comparison was made between the genetic architecture that had evolved in the ancestral environment and the way that this genetic architecture was disrupted following transfer to a new environment.
Natural selection on body size in Tribolium: possible genetic constraints on adaptive evolution
TLDR
To determine whether genetic constraints on adaptive evolution were operating in a laboratory population of a flour beetle, Tribolium castaneum, the direct selection acting on each of several body size traits was estimated and projections showed only a small predicted change in male pupal weight in spite of the strong selection, and a relatively large predicted increase in width in despite of the possible negative direct selection on this trait.
...
...