Performance of nine groundnut mutants and their parents under terminal drought stress conditions in western Sudan

Elgailani A. Abdalla, Abu Elhassan S. Ibrahim, Elhag H. Abuelgasim

Abstract


The current study was carried out at Elobeid Research Station Farm, North Kordofan State, Sudan, during 2003 and 2004 cropping seasons using nine groundnut mutants and their three parents. Its main objectives were creating genetic variation for selecting mutants with terminal drought tolerance and identifying drought tolerance traits that could be effectively used in groundnut breeding programs. Genotypic differences in days to 75% flowering were not significant with a range of 25-33 days. Mutants Barberton-B-30-3 and Barberton-B-30-4 exceeded their parent in pod yield, dry matter production, 100-seed weight and harvest index under stress conditions. Differences in reproductive efficiency of the genotypes were only significant under stressed environment of 2004 while shelling percentage differences were not significant under both environments and in the two seasons. Drought reduced pod yield of all the genotypes with ranges of 1381-2850 kg/ha and 677-2538 kg/ha for normal and stressed conditions, respectively with mutant Barberton-B-30-3 giving the highest pod yield. Though pod yield was positively, significantly and genotypically associated with most of the studied traits but their heritab-ility estimates were low except 100-seed weight. Hence, 100-seed weight is suggested as a selection criterion for high pod yield under terminal drought stress conditions of western Sudan..


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