H. Zeinalzadeh  Tabrizi, M.  Tosun, E.  Sahin, 
    Genotype x Environment Interaction and Stability Analysis of Orchardgrass (<I>Dactylis glomerata</I> L.) Ecotypes for Seed Yield in Turkey,
    Research Journal of Biological Sciences,
    Volume 6,Issue 9,
    2011,
    Pages 413-416,
    ISSN 1815-8846,
    rjbsci.2011.413.416,
    (https://makhillpublications.co/view-article.php?doi=rjbsci.2011.413.416)
    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 (S<SUB>i</SUB><SUP>2</SUP>, 
  genotypic Coefficient of Variation (CV<SUB>i</SUB>, ecovalence (W<SUB>i</SUB><SUP>2</SUP>), 
  stability variance (&#963;<SUB>i</SUB><SUP>2</SUP>), regression coefficient 
  (b<SUB>i</SUB>), mean of regression deviation (S<SUB>di</SUB><SUP>2</SUP>) mean 
  variance (<img src="http://docsdrive.com/images/medwelljournals/rjbsci/2011/img1-2k11-413-416.gif" width="10" height="12" align="absmiddle">), 
  superiority index (P<SUB>i</SUB>), rank analysis (L<SUB>i</SUB>) and (R<SUB>i</SUB>). 
  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 CV<SUB>i</SUB> along with cluster analysis, ecotype U7 with a good combination 
  of yield and stability can be recommended.
    Keywords: variance;stability analysis;GenotypexEnvironment interaction;orchardgrass;seed yield;Iran