Research Topics
| D RoffSummaryAffiliation: McGill University Country: Canada Publications
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Detail Information
Publications
The evolution of the G matrix: selection or drift?D Roff
Department of Biology, McGill University, 1205 Dr Penfield Ave, Montreal, Quebec, Canada H3A 1B1
Heredity (Edinb) 84:135-42. 2000..However, more research on the predicted statistical distribution of G as a result of selection and/or drift is required and further development of statistical tests to distinguish these two forces needs to be made...- A quantitative genetic analysis of phenotypic plasticity of diapause induction in the cricket Allonemobius sociusD A Roff
Department of Biology, McGill University, 1205 Dr Penfield Ave, Montreal, Quebec, Canada, H3A 1B1
Heredity (Edinb) 84:193-200. 2000..When the two environments are converted into the estimated days in the year the two reaction norms form approximately a single curve as predicted from previous theoretical analysis of the optimal reaction norm... - The evolution of trade-offs: effects of inbreeding on fecundity relationships in the cricket Gryllus firmusD A Roff
Department of Biology, McGill University, Montreal, Quebec, Canada
Evolution 55:111-21. 2001..This prediction is supported. These results indicate that trade-offs will evolve and such changes will affect evolutionary trajectories by altering the pattern of relationships among fitness components... - The threshold model as a general purpose normalizing transformationD A Roff
Department of Biology, McGill University, 1205 Dr Penfield Ave, Montreal, Quebec, Canada, H3A 1B1
Heredity (Edinb) 86:404-11. 2001..Confidence intervals estimated from the non-normal data were consistently too small. The method is illustrated using data on the proportion of diapausing eggs produced by the cricket, Allonemobius socius... - The evolution of the phenotypic covariance matrix: evidence for selection and drift in MelanoplusD A Roff
Department of Biology, University of California, Riverside, CA 92521, USA
J Evol Biol 18:1104-14. 2005.... - The effect of temperature and wing morphology on quantitative genetic variation in the cricket Gryllus firmus, with an appendix examining the statistical properties of the Jackknife-MANOVA method of matrix comparisonM Begin
Department of Biology, McGill University, Montreal, Quebec, Canada
J Evol Biol 17:1255-67. 2004..The implications of this result are discussed with respect to the prediction of evolutionary trajectories... - Extra-nuclear effects on growth and development in the sand cricket Gryllus firmusD A Roff
Department of Biology, University of California, Riverside, CA, USA
J Evol Biol 17:663-71. 2004..This study demonstrates that extra-nuclear effects are important contributors to the phenotypic variation in life history traits of G. firmus... - Phenotypic plasticity and the evolution of trade-offs: the quantitative genetics of resource allocation in the wing dimorphic cricket, Gryllus firmusD A Roff
Department of Biology, University of California, Riverside, CA 92521, USA
J Evol Biol 16:55-63. 2003..Analysis further indicates a very high genetic correlation between environments (food ration) supporting the hypothesis of a strong functional constraint between reproduction and flight capability... - The common quantitative genetic basis of wing morphology and diapause occurrence in the cricket Gryllus veletisM Begin
Department of Biology, McGill University, Montreal, Quebec, Canada
Heredity (Edinb) 89:473-9. 2002.... - Evolutionary genetics of lifespan and mortality rates in two populations of the seed beetle, Callosobruchus maculatusC W Fox
Department of Entomology, S 225 Agricultural Science Center North, University of Kentucky, Lexington, KY 40546 0091, USA
Heredity (Edinb) 92:170-81. 2004..This study thus demonstrated substantial genetic variation in lifespan and mortality rates within and between populations of C. maculatus... - Comparing sire and dam estimates of heritability: jackknife and likelihood approachesD A Roff
Department of Biology, University of California, Riverside, CA, USA
Heredity (Edinb) 100:32-8. 2008..An approximate power analysis can be done using the data from the jackknife method but the estimated power is typically a substantial underestimate of the true power and its use is not recommended... - Inbreeding and extreme outbreeding cause sex differences in immune defence and life history traits in Epirrita autumnataM J Rantala
Department of Biology, Section of Ecology, University of Turku, Turku, Finland
Heredity (Edinb) 98:329-36. 2007.... - The evolution of trade-offs: where are we?D A Roff
Department of Biology, University of California, Riverside, CA 92507, USA
J Evol Biol 20:433-47. 2007..Although this lack is discouraging, we suggest that it provides a rich ground for further study and the integration of many disciplines, including the emerging field of genomics... - The importance of growth and mortality costs in the evolution of the optimal life historyD A Roff
Department of Biology, University of California, Riverside, CA 92521, USA
J Evol Biol 19:1920-30. 2006..We find that the PJM model is unacceptable but that the SSJM model produces fits suggesting that, within the two species studied, juvenile mortality is proportional to adult mortality but the value differs between the two species... - The quantitative genetics of sexual dimorphism: assessing the importance of sex-linkageD J Fairbairn
Department of Biology, University of California, Riverside, CA 92521, USA
Heredity (Edinb) 97:319-28. 2006..This novel protocol will allow quantitative evaluation of the above predictions, and hence should spur progress in understanding the role of sex-linkage in the evolution of SD... - Analysis of the importance of genotypic variation, metabolic rate, morphology, sex and development time on immune function in the cricket, Gryllus firmusM J Rantala
Department of Biology, University of California, CA, USA
J Evol Biol 19:834-43. 2006..Our study indicates that genetic variation in immune parameters can be a very significant contributor to phenotypic variation in immune function... - The evolution of fledging age in songbirdsD A Roff
Department of Biology, University of California, Riverside, CA 92521, USA
J Evol Biol 18:1425-33. 2005..3-0.4 of nesting mortality (i.e. mortality declines rapidly after fledging) produces predictions which, on average, equal the observed values. Data are presented showing that mortality does indeed decline rapidly upon fledging... - The evolution of trade-offs: geographic variation in call duration and flight ability in the sand cricket, Gryllus firmusD A Roff
Department of Biology, University of California, Riverside, CA 92521, USA
J Evol Biol 16:744-53. 2003..But in the Bermuda and South Carolina populations the probability of a female selecting a macropterous male is less than P, indicating a preference for the micropterous male even after differences in call duration are accounted for... - Geographic variation in the G matrices of wild populations of the barn swallowD A Roff
Department of Biology, University of California, Riverside, CA 92521, USA
Heredity (Edinb) 93:8-14. 2004..The significant variation among the populations in the G matrices appears to be due in large measure to the most geographically distant population... 
Male sand crickets trade-off flight capability for reproductive potentialI K Saglam
Ecological Sciences Research Laboratories, Department of Biology, Faculty of Science, Hacettepe University, Ankara, Turkey
J Evol Biol 21:997-1004. 2008..The possible implications of this for morph-specific reproductive tactics are discussed...