Author details
Author M. P. Tripathi |
Available item(s) by this author (2)
Refine your search Apply to external sourcesEvaluation 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)
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 futurLink 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 futurLink for e-copy: https://afu.edu.np/jafu
Title : Evaluation of maize hybrids in Terai and inner Terai ecological belt of Nepal Material Type: printed text Authors: K. B. Koirala, Author ; T. R. Rijal, Author ; G. K.C., Author ; Salman Khan, Author ; D, N. Mahato, Author ; S. Manandhar, Author ; S. Subedi, Author ; M. P. Tripathi, Author Publication Date: 2020 Article on page: 109-116 p. Languages : English (eng) Keywords: Coordinated varietal trial, genotypes, multi-location, single cross Abstract: Hybrid is the most economical option to boost up the grain yield of maize, and slowly it is gaining popularity among the
farmers of Nepal. In order to identify the potential hybrids suitable for Terai and Inner Terai regions, a set of experiment was
conducted on hybrid maize developed by National Maize Research Program (NMRP), Rampur in Coordinated Variety Trials
(CVTs) during the winter season of 2014/15 and 2015/16. The experiments were done by using Randomized Complete Block
Design (RCBD). Each treatment was replicated thrice for each site at Rampur, Belachapi, Tarahara, and Parwanipur. Over
the years, genotypes RML-83/RL-197 and RML-4/RL-111 yielded higher than other tested genotypes in Tarahara. Similarly,
RL-180/RL-105, RML-87/RL-105, Dekalb double and Rampur Hybrid-6 produced higher grain yield at Belachapi during
2014/15. Genotype RML-4/RML-111 followed by RML-98/RL-105, and Rampur Hybrid-6 yielded higher at Parwanipur
during 2015/16. In the case of Rampur, genotypes RML-98/RML-105 had produced higher yield in both the years whereas
RML-5/RL-105 during 2014/15, and Rampur Hybrid-2 followed by RML-55/RL-105 were the superior genotypes in terms
of grain yield during 2015/16. Those hybrids with higher grain yield in CVTs will be upgraded to Coordinated Farmers Field
Trial on Hybrid (CFFTH) and these hybrids might be the potential future hybrids for Terai and Inner Terai of Nepal.Link for e-copy: https://afu.edu.np/sites/default/files/Evaluation%20of%20maize%20hybrids%20in%20 [...]
in Journal of Agriculture and Forestry University > Volume 4 (2020) . - 109-116 p.[article] Evaluation of maize hybrids in Terai and inner Terai ecological belt of Nepal [printed text] / K. B. Koirala, Author ; T. R. Rijal, Author ; G. K.C., Author ; Salman Khan, Author ; D, N. Mahato, Author ; S. Manandhar, Author ; S. Subedi, Author ; M. P. Tripathi, Author . - 2020 . - 109-116 p.
Languages : English (eng)
in Journal of Agriculture and Forestry University > Volume 4 (2020) . - 109-116 p.
Keywords: Coordinated varietal trial, genotypes, multi-location, single cross Abstract: Hybrid is the most economical option to boost up the grain yield of maize, and slowly it is gaining popularity among the
farmers of Nepal. In order to identify the potential hybrids suitable for Terai and Inner Terai regions, a set of experiment was
conducted on hybrid maize developed by National Maize Research Program (NMRP), Rampur in Coordinated Variety Trials
(CVTs) during the winter season of 2014/15 and 2015/16. The experiments were done by using Randomized Complete Block
Design (RCBD). Each treatment was replicated thrice for each site at Rampur, Belachapi, Tarahara, and Parwanipur. Over
the years, genotypes RML-83/RL-197 and RML-4/RL-111 yielded higher than other tested genotypes in Tarahara. Similarly,
RL-180/RL-105, RML-87/RL-105, Dekalb double and Rampur Hybrid-6 produced higher grain yield at Belachapi during
2014/15. Genotype RML-4/RML-111 followed by RML-98/RL-105, and Rampur Hybrid-6 yielded higher at Parwanipur
during 2015/16. In the case of Rampur, genotypes RML-98/RML-105 had produced higher yield in both the years whereas
RML-5/RL-105 during 2014/15, and Rampur Hybrid-2 followed by RML-55/RL-105 were the superior genotypes in terms
of grain yield during 2015/16. Those hybrids with higher grain yield in CVTs will be upgraded to Coordinated Farmers Field
Trial on Hybrid (CFFTH) and these hybrids might be the potential future hybrids for Terai and Inner Terai of Nepal.Link for e-copy: https://afu.edu.np/sites/default/files/Evaluation%20of%20maize%20hybrids%20in%20 [...]
