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Identification of heat tolerant hybrids based on morphological traits and selection indices

Creator: Longmei, N.
Creator: Gill, G.K.
Creator: Kumar, R.
Creator: Zaidi, P.H.
Creator: Pal, L.
Year: 2020
URI: https://hdl.handle.net/10883/21184
Language: English
Publisher: Excellent Publishers
Copyright: CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose
Type: Article
Place of Publication: India
Pages: 1814-1823
Issue: 6
Volume: 9
DOI: 10.20546/ijcmas.2020.906.226
Keywords: Morphological Traits
Description: Development of climate resilient cultivars is necessary for maize production as increased temperature have negative impact on maize yield. Selection based on grain yield along with stress-adaptive secondary traits could help in the development of improved, stable heat stress tolerant cultivars. The current study was conducted to identify reliable and effective secondary traits associated with heat stress tolerance in tropical maize. A Six hundred and sixty two double haploid lines derived from nine bi-parental pedigree populations were phenotyped under natural heat stress and optimal condition. Evaluation was carried out under optimal and natural heat stress condition by sowing on 1st week of February and March to expose the reproductive stages and grain filling period during heat stress. Various morphological traits under study were significantly affected by heat stress. ASI found negative correlation and direct effect while EH observed positive correlation and direct effect under heat stress condition. In both conditions, grain yield found positive and significant correlation with STI, MP and GMP as indicated the better heat stress tolerant indices toward Yp and Ys. Results of this study showed that the DH line, DH_1_178 identified as heat tolerant line since this DH line had high grain yield in both conditions and this line can used in future heat tolerant breeding programme.
Agrovoc: MAIZE
Agrovoc: HEAT STRESS
Agrovoc: MORPHOLOGY
Agrovoc: SELECTION INDEX
Agrovoc: CLIMATE CHANGE
ISSN: 2319-7706
Journal: International Journal of Current Microbiology and Applied Sciences


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  • Maize
    Maize breeding, phytopathology, entomology, physiology, quality, and biotech

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