Thus, we interpret the interpopulation variation we observed, along with the intrapopulation data, as supportive of the idea that Lesquerella has the sort of genetic and environmental variation
favoring the evolution of adaptive syndromes of germination and post-germination traits within populations.
The ECSM statistical extensions accurately model the impact of process and environmental variation
- a potentially performance depriving problem - which can negate many of the advantages of moving to process nodes at or below 65nm.
Phenotypic variation in natural populations is influenced by both genetic and environmental variation
Via 1984; Lively 1985; Scheiner and Lyman 1989; Weis and Gorman 1990; Hillesheim and Stearns 1991; Boulding and Hay 1993; Miller and Fowler 1993; Andersson and Shaw 1994) have emphasized the role of coarse-grained environmental variation
(that is, variation in which each individual effectively experiences only one of a range of possible environments) as a selective agent favoring phenotypic flexibility.
On a biochemical level, interactions between genes are simple and additive, and environmental variation
is normally distributed and also additive.
Such phylogenetic constraints in development, implying low levels of genetic variation within a species for the parameter in question, will limit both phenotypic and evolutionary responses to environmental variation
Minimizing environmental variation
in the laboratory facilitates detection of genetic variation but also results in heritabilities that are likely to be greater than they would be in nature.
Because each population initially had the same genetic composition, residual differences between the progeny of the two selective groups likely reveals evolutionary change in response to local environmental variation
However, evolution of quantitative traits is dependent on many factors other than genetic variation per se (Arnold and Wade 1984; Mitchell-Olds and Rutledge 1986; Mitchell-Olds and Shaw 1987; Arnold 1992), such as the correlation structure involving other traits, the level of environmental variation
in relation to additive genetic variation (e.
Hickman 1975), thus experiments are often employed that account for this source of environmental variation
She also studies how Adelie penguin populations and sea bird foraging behaviours respond to environmental variation
The genetic control of persistency is very less in the study however the genetic control can be better estimated by recording accurate measurements of reason of shorter lactations and precise pedigree recording and the further research is needed to explore the exact cause of greater environmental variation
and low heritability of persistency.