Indian Society of Genetics & Plant Breeding

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Assessment of genetic variation and selection of most responsive lines for root traits in relation to phosphorous nutrition in groundnut (Arachis hypogaea L.)

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Genetic studies were conducted to select lines efficient
in Phosphorus (P) uptake under the soils with reduced P
availability from a set of RILs derived from a cross JL24 x
ICGV 86590 in groundnut. ANOVA and genetic variability
components revealed significant variations among RILs,
phosphorus levels and their interaction for most of the
root traits enabling intensive selection. ICGV 86590
showed a higher response to P, while JL 24 recorded
negative response for primary root length and shoot
length. RILs displayed variable degree of response (in
percent). Selected 20 contrasting lines exhibited
significant variations with high heritability for P uptake.
In both P availability conditions P uptake traits showed
significant positive correlation with biomass traits. RILs
1-23 and 1-18 were most responsive based on their per se
performance and per cent responsiveness over the traits.

Keywords: Groundnut, phosphorus, RDW, RP, per cent responsiveness

Info

Year: 2012
Volume: 72
Issue: 4
Article DOI: N/A
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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