yield potential of exotic potato varieties subsequent in generations

Abstract

Abstract : Fifteen exotic potato varieties were evaluated for yield potential over three generations during 1989-90 to 1991-92. Both the fresh and dry yield were significantly higher in 2nd generation than 1st and 3rd generations. The average reduction of yield over 1st generation was found to be higher in Alkon, Granola, Obelix and Origo ranging (-10.3 to -38.8%) but very lower in Mondial (-0.7%) and Producent (-0.5%). On an average, the high increase in yield in subsequent generations over 1st generation was noticed in Bartina, Diamant, Liseta and Morene (173 to 64.5%). Similarly the degeneration of dry yield was observed in Granola, Obelix, Origo and Producent (1.1 to 40.5%) while the yield increased in Bartina, Diamant, Liseta, Escort, Morene and Thebes (17.5 to 38.8%). Considering the parameters studied, varieties viz. Ajiba, Bartina, Liseta, Mondial, Morene and Thebes showed acceptable performance in comparison to recommended variety Diamant.