BIOL 5240 Fall 2005
Laurila, A., S. Karttunen, and J.
Merila. 2002. Adaptive phenotypic plasticity and genetics of
larval life histories in two Rana temporaria populations. Evolution 56(3):617-627.
We haven’t talked yet about genetic correlations among
traits, so don’t worry about that aspect of the paper (Table 4).
on what you know about basic genetics, how is it possible that
“plasticity” can have a genetic basis?
Why isn’t plasticity just an environmental effect?
- On the
top of page 618, column 1, second full sentence, the authors state:
“Furthermore, in many within-population vertebrate studies conducted so
far, the genetic estimates of plasticity have been potentially distorted
by the use of full-sibling analyses, which tend to overestimate the amount
of additive genetic variation.”
Explain to me what are they talking about here in terms of
- Why did
the authors hypothesize that the two focal populations should differ in
plasticity for the traits that they studied? Were their hypotheses supported?
does each of the following main effects in the ANOVA mean? For example, if they were significant,
what would you conclude?
does each of these interactions in the ANOVA mean? For example, if it were statistically
significant, what would you conclude?
Population x treatment
Sire x treatment
Dam x treatment
- Is it
likely that adaptive phenotypic plasticity will continue to evolve in
these populations? Why or why not?