While ascertaining stability of genotypes, how to estimate the % variation due to environments, genotypes and their interaction. Can it be calculated manually (in MS Excel)?
ANOVA partitions total variability represented by total sum of squares SSt into four components: (1) sum of squares due to genotype SSg (2) sum of squares due to environment SSenv (3) sum of squares due the genotypexenvironment interaction SSgxe (4) sum of squares due to error SSe. The ratio of each sum of squares to SSt is the proportion each variable contributes to the total variability respectively. Note that the proportions add up to 1.
Dear Lakshmi
You can use factorial experiment with two factors : the first factor A ( genotypes) and the second factor B ( environments ).
The ANOVA of factorial experiment result the following sources of variance:
Main effect of genotypes (A)
Main effect of environments (B)
Interaction between A*B
Experimental Error
Good Luck
Sir Thanq for replying. However I need the % Total sum of squares due to above factors individually, as we can see in many articles on Genotype x Environment interaction.
ANOVA partitions total variability represented by total sum of squares SSt into four components: (1) sum of squares due to genotype SSg (2) sum of squares due to environment SSenv (3) sum of squares due the genotypexenvironment interaction SSgxe (4) sum of squares due to error SSe. The ratio of each sum of squares to SSt is the proportion each variable contributes to the total variability respectively. Note that the proportions add up to 1.
- Badges
- Science method
- Similar topics
- Mathematics
- Statistics
- Statistical Modeling
- Analyses of Variance
- ANOVA