Assessment of genotype x environment interactions and stability analysis in field peas (Pisum sativum)
2009
Toklu, Faruk | Karakoy,Tolga | Anlarsal, A Emin
This study was conducted during 2000-04 to assess the stability and performance of 10 varieties of field pea \{Pisum sativum L.) using univariate and multivariate statistical methods. Genotypic, environmental, and GxE interaction variances were found to be significant for all traits. The amount and distribution of rainfall and soil characteristics had significant effect on grain yield and other plant traits. Estimated stability parameters as co-efficient of variation (CV,), genotypic variances accross environments (S2,), ecovalence (W2,), regression co-efficient (bi) and deviation from regression (52di) showed that 2 varieties, namely 'Sprinter' and 'Progress' were the most stable with highest grain yield (2 241 and 2 034 kg/ha, respectively). The lowest bt value of 'Sprinter' was an indication of its specific stability for grain yield. Mean grain yield had a significant negative correlation with CVt and, CVt had a strong positive correlation with S2; and bt. S2; was significantly positive correlated to the W2,-, bi and S2di.
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