[article]
| Title : |
Evaluation of heat tolerant maize (zea mays l.) Inbred lines under natural field conditions in India |
| Material Type: |
printed text |
| Authors: |
M. P. Tripathi, Author ; Ghimire; S.K., Author ; S. K. Nair, Author ; Shanti Kumari Shahi, Author ; M. P. Pandey, Author ; M. T. Vinayanan, Author ; K. Seetharaman, Author ; P. H. Zaidi, Author |
| Publication Date: |
2020 |
| Article on page: |
99-104 p. |
| Languages : |
English (eng) |
| Keywords: |
Double haploid (DH), genotypic variation (σ2 g), heat stress, heritability (h2), and inbred lines |
| Abstract: |
Heat stress is becoming an eminent constraint of maize production in all the major maize producing regions, including
South Asia. Effect of natural heat stress on flowering, height, grain yield, and other major secondary traits were evaluated
in Hyderabad and Bhubaneswar, India during spring season of 2016. Two hundred and two double haploid (DH) maize
inbred lines were tested for heat tolerance using α-lattice design with two replication. Differences observed for days to
anthesis (AD), days to silking (SD), plant height (PH), ear height (EH), tassel blasting (TB), leaf firing (LF), senescence
(SEN), soil plant analysis development (SPAD) index, and grain yield (GY) among the tested maize lines. The GY of
heat tolerant parent ranged 0.227-0.375 t ha-1 and susceptible tester ranged 0.10-0.15 t ha-1 while grain yield of population
ranged from 0.014 to 0.935 t ha-1. The wider range of genotypic variation was recorded among inbred lines for TB
(205.7-234.3), LF (534.7-559.5), and SEN (132.4-163.4). Moderate to high heritability (0.63 to 0.95) and transgressive
segregations were observed in both directions for these secondary traits. As major and additive genes can be expected
for moderate to high heritability of these traits, selection could be a best tool to be applied for reliable improvement of
maize against heat stress. Indirect selection of the secondary traits can play influential roles in GY improvement of maize
under heat stress. Such information could be useful in inbred lines selection and development of novel heat tolerant
maize hybrids in the futur |
| Link for e-copy: |
https://afu.edu.np/jafu |
in Journal of Agriculture and Forestry University > Volume 3 (2019) . - 99-104 p.
[article] Evaluation of heat tolerant maize (zea mays l.) Inbred lines under natural field conditions in India [printed text] / M. P. Tripathi, Author ; Ghimire; S.K., Author ; S. K. Nair, Author ; Shanti Kumari Shahi, Author ; M. P. Pandey, Author ; M. T. Vinayanan, Author ; K. Seetharaman, Author ; P. H. Zaidi, Author . - 2020 . - 99-104 p. Languages : English ( eng) in Journal of Agriculture and Forestry University > Volume 3 (2019) . - 99-104 p.
| Keywords: |
Double haploid (DH), genotypic variation (σ2 g), heat stress, heritability (h2), and inbred lines |
| Abstract: |
Heat stress is becoming an eminent constraint of maize production in all the major maize producing regions, including
South Asia. Effect of natural heat stress on flowering, height, grain yield, and other major secondary traits were evaluated
in Hyderabad and Bhubaneswar, India during spring season of 2016. Two hundred and two double haploid (DH) maize
inbred lines were tested for heat tolerance using α-lattice design with two replication. Differences observed for days to
anthesis (AD), days to silking (SD), plant height (PH), ear height (EH), tassel blasting (TB), leaf firing (LF), senescence
(SEN), soil plant analysis development (SPAD) index, and grain yield (GY) among the tested maize lines. The GY of
heat tolerant parent ranged 0.227-0.375 t ha-1 and susceptible tester ranged 0.10-0.15 t ha-1 while grain yield of population
ranged from 0.014 to 0.935 t ha-1. The wider range of genotypic variation was recorded among inbred lines for TB
(205.7-234.3), LF (534.7-559.5), and SEN (132.4-163.4). Moderate to high heritability (0.63 to 0.95) and transgressive
segregations were observed in both directions for these secondary traits. As major and additive genes can be expected
for moderate to high heritability of these traits, selection could be a best tool to be applied for reliable improvement of
maize against heat stress. Indirect selection of the secondary traits can play influential roles in GY improvement of maize
under heat stress. Such information could be useful in inbred lines selection and development of novel heat tolerant
maize hybrids in the futur |
| Link for e-copy: |
https://afu.edu.np/jafu |
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Evaluation of heat tolerant maize (zea mays l.) Inbred lines under natural field conditions in India / M. P. Tripathi in Journal of Agriculture and Forestry University, Volume 3 (2019)
