Indian Society of Genetics & Plant Breeding

Unravelling the phosphorus use efficiency associated traits in mungbean (Vigna radiata L.) under low phosphorus condition

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Phosphorus (P) deficiency is one of the serious problems
affecting plant growth in mungbean in different parts of
the world. The root, shoot and biomass related traits were
investigated for identifying P-efficient genotypes in 54
mungbean genotypes under low-P (LP) and normal-P (NP)
conditions. In this study, the membership function value
of P use efficiency of studied traits was used as a
compendious index for studying P use efficiency (PUE) in
mungbean. Among the studied traits, mean values of total
root volume, chlorophyll concentration, root dry weight
(RDW) and root to shoot ratio increased >25% under LP
condition indicating that these traits are highly responsive
to P deficiency. Correlation and stepwise regression
analysis revealed that RDW explained most of the variation
and could be used as a clear indicator of PUE. The five
highly P-efficient genotypes namely, MH 805, M 42, PUSA
9531, EC 398885 and M 209 with high MFVP values may be
used for PUE improvement in mungbean.

Keywords: Green gram, membership function value of P use efficiency, phosphorus use efficiency, root traits, regression analysis


Year: 2020
Volume: 80
Issue: 4
Article DOI: 10.31742/IJGPB.80.4.6
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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