Reaction of drou
Reaction of drought tolerance in grain maize hybrid using drought tolerance indices
S. H. Ghasemi 1, R. Chokan2
1, 2, Seed and plant Improvement Institute, Karaj, Iran.
*Corresponding author: email@example.com, Tel +98-910-2911161
Abstract: In order to examine effects of drought stress in yield of maize grain hybrid in moisture stress condition and non-stress with use tolerance indices, this study carried out in 2007 at experimental field of Seed and plant Improvement Institute, Karaj, Iran in four separate experiments, normal irrigation, vegetative period stress, reproductive period stress and general stress condition using randomized complete block design in three repetition. Six tolerance indices are Mean Productivity (MP), Geometrical Mean Productivity (GMP), Harmonic mean (Harm), Tolerance Index (TOL), Stress Susceptibility Index (SSI) and Stress Tolerance Index (STI) to determine for all of hybrid. In attention to correlation between tolerance indices and yield in drought stress condition and non drought stress condition GMP and STI indices were identified as the best and a reliable criteria to select also between 20 hybrid of study hybrids KLM76005/7-1-2-1-1-1XK19/1 and KSC 704 were identified as tolerant to vegetative period stress condition, hybrids ZP 677, ZP 684 and KLM 76005/7-1-2-1-1-1 X K19/1 were identified as tolerant to reproductive period stress condition and hybrids KSC 720, KLM 76005/7-1-2-1-1-1 X K19/1 and KSC 704 were identified as tolerant to general period stress condition. Hybrid KLM 76005/7-1-2-1-1-1 X K19/1 is the best hybrid in each four experiments, vegetative period stress, reproductive period stress, general period stress and non-stress after those hybrids ZP 677, KSC 720 and KSC 720 introduced as tolerant hybrids to moisture stress condition.
[S. H. Ghasemi, R. Chokan. Reaction of drought tolerance in grain maize hybrid using drought tolerance indices. Life Sci J 2013;10(1):935-943]. (ISSN: 1097-8135). http://www.lifesciencesite.com. 6
Keywords: Maize; Hybrid; Drought stress; Tolerance indices.