Character association studies of drought tolerant attributes in groundnut (Arachis hypogaea L.)
Abstract
An investigation was carried out to study character association among physiological and drought tolerant attributes with 30 groundnut genotypes at College farm, Agricultural College, Mahanandi, Kurnool district, Andhra Pradesh. It indicated that the characters pod yield per plant, shelling out turn, harvest index, number of mature pods per plant, number of sound mature kernel, plant height, specific leaf area, crop growth rate at 75 DAS to harvest and relative growth rate at 75 DAS to harvest were significantly and positively inter-related among themselves and also with the kernel yield per plant. Hence, the improvement of any of these attributes would simultaneously improve the kernel yield per plant. Pod yield per plant exerted high positive direct effect on kernel yield per plant followed by shelling out turn. Plant height, number of mature pods per plant, number of sound mature kernels, harvest index and CGR at 75 DAS to harvest exerted their indirect effect through source contributions for several other characters. It is, therefore, inferred that these characters are to be given importance while formulating selection criteria in breeding programmes to isolate lines with genetic potential for high kernel yield.
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