“…Cotton genotypes grown in a controlled environment under optimal conditions (35/21 ± 2 • C) for 30 days and then exposed to high temperature (46/30 ± 2 • C) at the reproductive stage, by gradually increasing temperature by 2 • C per day, were screened for CMT-cultivars FH-900, MNH-552, CRIS-19, and Karishma emerged as relatively heat-tolerant (thermostable) and FH-634, CIM-448, HR109-RT, and CIM-443 as heat-susceptible (Rahman et al, 2004). In a similar study at > 32 • C, cotton genotypes B557 and NIAB-78 showed minimum electrolyte leakage (<40%) and were regarded as tolerant compared to genotypes MNH-554, FH682 and FH900 which showed maximum electrolyte leakage (>50%) (Rana et al, 2011). Abro et al (2015) reported cotton varieties NIA-80, NIA-81, NIA-83, NIA-84, NIA-M-30, NIA-M31, NIA-HM-48, NIA-HM-327, NIA-H-32, NIA-HM-2-1, NIA-Bt1, NIA-Bt2, NIA-Perkh, CRIS-342, CRIS-134, and NIAB-111 and check variety Sadori as heat-tolerant using CMT as a screening parameter in both heat-stressed (44 • C) and non-stressed (32 • C) temperature regimes.…”