Research Journal of Biological Sciences
Genotype x Environment Interaction and Stability Analysis of Orchardgrass (Dactylis glomerata L.) Ecotypes for Seed Yield in Turkey
Authors : E. Sahin, H. Zeinalzadeh Tabrizi and M. Tosun
Abstract: The objective of this study was stability parameters estimation
of orchardgrass ecotypes in order to identify stable ecotype for seed yield
in Erzurum ecological condition in Turkey. The experiment was conducted in terms
of randomized complete block design with three replications. Plant materials
were seeds collected from 16 promising lines obtained from different local orchardgrass
ecotype populations (Oltu and Ulubag) along with standard local variety (control)
for seed yield. In order to estimate stability parameters, different methods
have been used including mean yield, environmental variance (Si2,
genotypic Coefficient of Variation (CVi, ecovalence (Wi2),
stability variance (σi2), regression coefficient
(bi), mean of regression deviation (Sdi2) mean
variance (
),
superiority index (Pi), rank analysis (Li) and (Ri).
Cluster analysis based on all stability parameters was applied as well. There
were significant effects for year, genotype and their interactions for seed
yield trait. According to stability parameters, biplot diagram of mean yield
and CVi along with cluster analysis, ecotype U7 with a good combination
of yield and stability can be recommended.
How to cite this article:
E. Sahin, H. Zeinalzadeh Tabrizi and M. Tosun, 2011. Genotype x Environment Interaction and Stability Analysis of Orchardgrass (Dactylis glomerata L.) Ecotypes for Seed Yield in Turkey. Research Journal of Biological Sciences, 6: 413-416.