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Electroweak radiative corrections can generate the neutrino (mass)$^2$difference required for the large mixing angle solution (LMA) to the solarneutrino problem if two of the neutrinos are assumed degenerate at high energy.We test this possibility with the existing experimental knowledge of the lowenergy neutrino mass and mixing parameters. We derive restrictions on ranges ofthe high scale mixing matrix elements and obtain predictions for the low energyparameters required in order to get the LMA solution of the solar neutrinoproblem picked out by KamLAND. We find that in the case of standard model thisis achieved only when the (degenerate) neutrino masses lie in the range$(0.7-2) \eV$ which is at odds with the cosmological limit $m_{\nu}<0.23 \eV$(at $95 % C.L$) established recently using WMAP results. Thus SM radiativecorrections cannot easily generate the LMA solution in this scenario. However,the LMA solution is possible in case of the MSSM electroweak corrections with(almost) degenerate spectrum or with inverted mass hierarchy for limited rangesin the high scale parameters.Comment: 15 pages, LATEX includes five postscript figure

Implications of partially degenerate neutrinos at a high scale in light of KamLAND and WMAP results