Response of Groundnut Genotypes to Photosynthetically Active Radiation

R B Gajjar; A M Shekh; N M Patel

doi:10.56093/aaz.v33i3.66202

Authors

R B Gajjar Department of Agril. Meteorology, BA. College of Agriculture, Gujarat Agricultural University, Anand Campus, Anand
A M Shekh Department of Agril. Meteorology, BA. College of Agriculture, Gujarat Agricultural University, Anand Campus, Anand
N M Patel Department of Agril. Statistics,B.A. Collegeof Agriculture,Gujarat AgriculturalUniversity,Anand Campus,Anand

https://doi.org/10.56093/aaz.v33i3.66202

Abstract

The causes of high yieldpotential of groundnut (Arachish hypogaea L.) genotype Robut 33-1in comparisonto GG-2(the releasedvariety)duringsummerseasonwere assessed under experimentallycreated varyingenvironmentsusing meteorologicalparameters. The genotype Robut 33-1 had higher PAR conversionuse efficiency(CUE) than GG-2 at all the growth stages studied. The relation betweenPAR absorption coefficient(Y), and days after sowing (D) for Robut 33-1 was : Y = -0.647 + ,0.010 ; 0.0000570 D² and for GG-2 it was : Y = -1.016 + 0.0296830 - 0.0001250, With R² > 0.86. The rate of dry matter production was linear over the intercepted PAR (R² > 0.88).The CUE (dlY matter produced per unit of intercepted PAR), by linear regression technique was 1.542 g Mr^-1 in Robut 33-1 and 1.067g Mr¹ in GG-2. The results revealed that PAR and CUE. could be utilized in selection programme for high yield potential.