1Department of Agricultural Botany, Chaudhary Charan Singh PG College, Heonra, Saifai, Etawah-206130, India
2Department of Crop Physiology, C S Azad University of Agriculture and Technology, Kanpur-208002, India
*Author for correspondence: Email: manojcsa7383@gmail.com/drmanojccspgcollege@gmail.com
Online published on 27 January, 2016.
Twenty two advance Indian mustard [Brassica juncea (L.) Czern and Coss.] genotypes were evaluated to assess genotypic variability in physio-biochemical parameters under late sown conditions. On the basis of this study, it was found that genotypes RH-8814, NRCDR-02 and BPR-549-9 recorded maximum values of relative water content (RWC %), chlorophyll stability index (CSI %), chlorophyll content (mg/g f. wt. leaf tissue) and lesser membrane injury index (MII %) over other genotypes at different growth stages. Thus RH-8814, NRCDR-02 and BPR-549-9 indicated their involvement in mechanism of terminal heat tolerance. Genotypes NRCDR-701, NPJ-113, NPJ-117, RGN-773, RGN-197, RH-0116 and DRMR-537-40 recoded a moderate heat tolerance which is preferable under late sown irrigated condition. So they can be used as donors in crossing programs to evolve new mustard genotypes having thermal tolerance.
Chlorophyll stability index, chlorophyll content, relative water content, membrane thermo-stability index
