Indian Society of Genetics & Plant Breeding

Important

Inheritance of SPAD chlorophyll meter reading and specific leaf area in four crosses of groundnut (Arachis hypogaea L.)

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SPAD chlorophyll meter reading (SCMR) and specific leaf
area (SLA) are important traits associated with water-useefficiency
(WUE). Understanding their genetic nature and
association with yield parameters enables their deployment
in breeding programs for drought tolerance. The results
obtained from the study conducted on six generations of
four groundnut crosses showed significant additive effects
for SCMR and SLA in all the crosses indicating possible
gains through selection. Relative contribution of additive
effects was high for both, SCMR (58 to 93%) and SLA (63 to
91%). The low heritability of SCMR and SLA indicates
environmental influence on these traits. SCMR is positively
associated with pod, kernel and haulm yield, while the
association of SLA with them was negative. Combining
trait-based approach using SCMR and SLA with empirical
approach can be rewarding in groundnut breeding for
drought tolerance.

Keywords: WUE, SCMR, SLA, drought, additive effects, inheritance

Info

Year: 2015
Volume: 75
Issue: 3
Article DOI: 10.5958/0975-6906.2015.00067.X
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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