International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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Original Research Articles                      Volume : 9, Issue:6, June, 2020

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : /
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2020.9(6): 1814-1823

Identification of Heat Tolerant Hybrids based on Morphological Traits and Selection Indices
Ningthaipuilu Longmei1*, G. K. Gill2, R. Kumar1, P. H. Zaidi3 and Lalit Pal2
1Indian Institutes of Maize -ICAR, Ludhiana, Punjab, India
2Department Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana, Punjab, India
3International Maize and Wheat Improvement Centre (CIMMYT), Asia regional office, Hyderabad, India
*Corresponding author

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.

Keywords: Maize; Heat stress; Morphological traits; Selection indices; Climate change

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How to cite this article:

Ningthaipuilu Longmei, G. K. Gill, R. Kumar, P. H. Zaidi and Lalit Pal. 2020. Identification of Heat Tolerant Hybrids based on Morphological Traits and Selection Indices.Int.J.Curr.Microbiol.App.Sci. 9(6): 1814-1823. doi:
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