Abstract
Improvement of groundnuts for drought tolerance could increase production in drought prone areas.
This study aimed at determining the heritability estimates and relationship of HI and SCMR with yield
and yield components using 30 groundnut genotypes planted under different watering regimes, so as to
speed up the selection and breeding of groundnut genotypes tolerant to drought. A completely
randomized design arranged in a split plot experiment with four replications was conducted in screen
house in Morogoro, Tanzania. Data collection was done on plant height, number of pod/plant and pod
yield/plant. Drought tolerant traits measured included, harvest index (HI), SCMR at 40, 60 and 80 DAS.
Broad-sense heritability was calculated for HI, pod yield, number of pod/plant and SCMR. Results
showed that number of pods/plant, SCMR at 60 DAS and HI were significantly related to pod yield in
all watering condition. Heritability of the traits ranged from 0.22 to 0.59 with HI having highest value
and number of pods lowest in WW while in WS condition heritability was generally lower from 0.04
to 0.45. Due to SCMR at 60 DAS, number of pods/plant and HI having moderate heritability and
significant correlation with pod yield under water stress condition, these could be useful criteria in
drought tolerance selection.
Mashamba Philipo, Clara Mollay, Susan Nchimbi-Msolla. (2016) HERITABILITY AND RELATIONSHIP BETWEEN DROUGHT TOLERANCE TRAITS AND YIELD IN GROUNDNUTS (ARACHIS HYPOGAEA L.) UNDER DIFFERENT WATERING REGIMES, Asian Journal of Agriculture and Biology, Volume 4, Issue 4.
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