Dear All
I have scored plant height and spike length in three replication in two years.
The analysis of anove was
genotypes+replicaiton+years+ R*G+R*Y+R*G*Y
I have found high significant correlation between the two years and no significant interaction G*Y
the correlation between 2021 and 2022 for plant height is 0.99. I really astonished how I have high significant differences between the two years in Ph and found such high correlation between the two years for pH. the same trend also was found for SL
Even though the genotypes were consistent, environmental factors could still have an impact on the observed values of the trait in each year, leading to differences between the two years. For example, if one year had more rainfall or better soil fertility, the plants might have grown taller, resulting in higher plant height measurements. The opposite can occur in the case of temperature or pest and disease pressure, even if the genotypes were the same as in the other year.
Merouche, A., Debaeke, P., Messahel, M., & Kelkouli, M. (2014). Response of durum wheat varieties to water in semi-arid Algeria. African Journal of Agricultural Research, 9(38), 2880-2893.
Correlation compares population means over the two seasons, the high correlation indicates a similar overall performance of the population. ANOVA compares the performance of each genotype between both environments. In your case genotypes behave in different ways in both environments; however, the overall performance is similar.
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