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Indian Journal of Genetics and Plant Breeding (The)
Year : 2012, Volume : 72, Issue : 4
First page : ( 439) Last page : ( 444)
Print ISSN : 0019-5200. Online ISSN : 0975-6906.

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

Jadhav Sachin Sitaram*, Gowda M. V. C.

Wheat Scheme, MARS, University of Agricultural Sciences (UAS), Dharwad-580 005

1AICSMIP, PC Unit (Small Millets), GKVK, UAS, Bangalore 560 065, Karnataka

*Corresponding author's E-mail: ssljadhav77@gmail.com

Online published on 11 December, 2012.

Abstract

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.

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Keywords

Groundnut, phosphorus, RDW, RP, per cent responsiveness.

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