TABLE 1.

Types of variance contributing to between-group differences in phenotypic variability

	Sources of phenotypic variability
Variance groupa	Decanalization (epistasis)	Environmental sensitivity	Temporal fluctuation	Measurement error
Genetically distinct individuals with same allele at a vQTLb	•	•	•	•
Genetically identical individuals		•	•	•
Same individual at different times			•	•
Same individual at the same time				•

^aThe group in which variance is assessed, and between which variance is compared.

^bThe variance groups compared here.