Journal of FARM SCIENCES, Vol 27, No 2 (2014)

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Genetic variability for drought tolerance in advanced breeding lines of groundnut (Arachis hypogaea L.)

S.K. Savita, P.V. Kenchanagoudar, H.L. Nadaf

Abstract


Hundred groundnut genotypes were included in the study. The field experiments were conducted at two locations viz., Agricultural Research Station, Hanumanamatti and Regional Agricultural Research Station, Bijapur, during kharif 2011 under normal rainfed condition, to screen the advanced breeding lines of groundnut for their tolerance to drought. The same genotypes were tested to confirm the drought tolerance in the third location i.e. at the Main Agricultural Research Station, Dharwad during rabi/summer season 2012. Selection for characters based on genetic parameters specific leaf weight at 45 and 75 DAS and SPAD chlorophyll meter reading, number of primary branches per plant, number of secondary branches per plant, number of immatured pods per plant and number of matured pods per plant were preferred in all environments and 100 kernel weight under kharif at Hanumanamatti was preferred. Relative Water Content (RWC) and Specific Leaf Weight (SLW) at 45 DAS correlated positively in all drought condition except under normal irrigated condition in rabi/summer season, where the traits were negatively correlated with pod yield. Therefore, a better scope exists for these characters for improvement under drought or limited moisture condition in advanced breeding lines of groundnut.

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