Yield stability under different agronomic situations in linseed (Linum usitatissimum L.)
The present investigation was carried out at Bihar Agricultural College, Sabour, Bhagalpur (Bihar) during the rabi, 2017-18 with eighteen genotypes including three checks, in order to identify the high yielding stable linseed genotypes in three agronomic situations viz., Utera (sowing of the seed before harvesting of standing paddy crop in order to utilize moisture efficiently under rainfed agro-ecosystem), Rainfed, and Irrigated conditions. The mean squares due to genotypes and environments (linear) were highly significant for all the characters studied. The mean squares due to genotype x environment interactions (linear) were significant for days to days to 50 per cent flowering, oil content and seed yield per plant. The mean squares due to pooled deviations were significant for all the characters viz., flowering period, the number of primary branches per plant, the number of capsules per plant, the number of seeds per capsule, bud fly infestation, 1000-seeds weight, oil content and seed yield per plant. The highest yielding genotype, BRLS 111-3 and the lowest yielding genotype, BRLS 105-1 were found unstable. The genotype, BRLS 119 had reasonably high seed yield per plant (rank 2nd) and non-significant regression from deviation with regression coefficient at on par with one and identified as stable genotype having high seed yield. This genotype had also non- significant deviation from regression and regression coefficient at on par with one for the other characters viz., days to 50 per cent flowering, days to 50 per cent maturity, plant height, the number of primary branches per plant, the number of capsules per plant, bud blight infestation and 1000-seed weight. Hence, BRLS 119 was identified as a promising stable genotype which may be commercially grown after critical evaluation over locations.
Keywords: Agronomic situations, Linseed and Stability
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