Krishnaji Jodage, P. H. Kuchanur, P. H. Zaidi, Ayyanagouda Patil, K. Seetharam, M. T. Vinayan, B. Arunkumar
Environment & Ecology 35 (3C) : 2354—2360, July—September 2017
Abstract
Maize is more affected by abiotic stress especially heat stress as compared to other crop plants. In the present study, eight females and four males were crossed in NCD-II design to get 32 hy-brids and these hybrids were evaluated for their combining ability, mode of gene action and association of heat adaptive traits under natural heat stress condition. The combining ability analysis revealed that the predominance of non-additive gene action for heat tolerant traits as GCA/SCA variance ratio was very low except grain yield. Among the parents, L1 and L2 were good general combiners for heat tolerance com-ponent traits like leaf firing, tassel blast and also for yield contributing traits. Two hybrids, L1 × T3 and L4×T1 showed desirable sca effects for maximum num-ber of traits. Association studies revealed that yield was positively associated with plant height and num-ber of grains per cob and negatively associated with tassel blast and leaf firing under heat stress condition.
See: http://environmentandecology.com
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