A. RESHMA*, P. LATHA, V. UMAMAHESH, R.P. VASANTHI AND P. SUDHAKAR
Department of Crop Physiology, S.V. Agricultural College, Tirupati – 517 502, A.P.
Field experiment was conducted at Regional Agricultural Research Station, Tirupati during early kharif 2013 with 16 pre release and released groundnut genotypes. Heat stress tolerance of these genotypes across the important growth phenophases were measured using reliable traits viz., Relative injury to the cell membranes and Chlorophyll Stability Index. Among the pre release genotypes, TCGS-1375 recorded high CSI, moderate RI and high pod yield. TCGS-1375 possess high heat stress tolerance and high yield and hence farmers can grow this cultivar and is suitable for early kharif situation. Other genotypes, TCGS-1350, TCGS-1173, TCGS-1349, TCGS-1157 possess heat stress tolerance with moderate yields. These genotypes can be used as donor source in resistant breeding programmes.
Early kharif, Groundnut, Heat stress tolerance