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|Rawli Pandey, Brij Kishore Mishra, Nidhi Verma, Ameena Siddiqui and Sudhir Shukla|
|Identification of specific, widely adapted and stable genotypes in any crop can be done by evaluation of its expression of stability which may be achieved through one of the finest breeding strategy, genotype x environment interaction. A genotype is stable if it maintains its approximate yield in different environments. Opium poppy ( Papaver somniferum L.) is one of the most geographically-widespread medicinal plant having multiple medicinal properties due to opium and its alkaloids chiefly morphine, codeine, thebaine, narcotine and papaverine. The response of opium poppy genotypes to different environmental conditions varies which may change the grading of individuals within a set of genotypes, giving rise to genotype x environment interaction. So, there is always a need to develop new high yielding varieties which must be tested for their adaptability and stability in different environments prior to their release for commercial farming. The present study was aimed to identify promising and stable genotypes from few advanced breeding lines using Eberhart and Russell model and simultaneously its comparison with various other stability models like Shuklas si 2 , Wrickes Wi 2 and Tais λ i for its aptness and authenticity. Correlations study was also done to find out the interrelationship of each stability parameter with yield and among them. The analysis of variance (ANOVA) for stability revealed highly significant differences between genotypes which suggest presence of considerable difference amongst genotypes. The GEI (linear) as well as pooled deviation mean squares were also significant, representing the presence of both predictable and non-predictable components. Five genotypes LT31, BR231, BR233, BR242 and BR234 were identified stable in yield performance through Eberhart and Russell model and were also confirmed by other stability models. It was interesting to note that mean yield performance and stability parameters had positive association. This study concluded that Eberhart and Russell model can be reliably used for the identification of stable genotypes over environments.|
Rawli Pandey has completed her M.Sc. from Chatrapati Sahu ji Maharaj University, Kanpur in the year 2009 and working as Project Assitant in Genetics and Plant Breeding Laboratory, National Botanical Research Institute, Lucknow.
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