Genetic analysis of heat stress tolerance and association of traits in Tropical Maize (Zea mays L.)
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ArticleLanguage: English Publication details: 2017. India : MKK Publication,Subject(s): Online resources:
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Environment and Ecology v. 35, no. 3C, p. 2354-2360Summary: 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 hybrids 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 component 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 number of traits. Association studies revealed that yield was positively associated with plant height and number of grains per cob and negatively associated with tassel blast and leaf firing under heat stress condition.
| Item type | Current library | Collection | Call number | Status | Date due | Barcode | Item holds | |
|---|---|---|---|---|---|---|---|---|
| Article | CIMMYT Knowledge Center: John Woolston Library | CIMMYT Staff Publications Collection | Available |
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 hybrids 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 component 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 number of traits. Association studies revealed that yield was positively associated with plant height and number of grains per cob and negatively associated with tassel blast and leaf firing under heat stress condition.
Maize CRP FP3 - Stress resilient and nutritious maize
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