Analysis of genetic diversity among the maize inbred lines (Zea mays L.) under heat stress condition
High temperature adversely affects the plant physiological processes: limits plant growth and reduction in grain yield. Heat stress is often encountered to spring sowing of maize in spring season. Twenty maize inbred lines were studied for days to 50 % anthesis and silking, anthesis–silking interval, leaf firing, tassel blast, SPAD reading and leaf senescence, plant and ear height, leaf area index, ear per plant, cob length and diameter, number of kernel/ear, number of kernel row/ear, number of kernel row, silk receptivity, shelling percentage, thousand kernel weight and grain yield in alpha lattice design at National Maize Research Program at Rampur, Chitwan,Nepal with the objective to identify superior heat stress tolerant lines. Analysis of variance showed significant difference for all the traits. Result of multivariable analysis revealed that twenty inbred lines formed four clusters. The resistance inbred lines and susceptible inbred lines formed different clusters. The members of cluster 4 were found to be tolerant to heat stress due to they had lowest value of tassel blast, leaf firing, and leaf area index with highest value of cob diameter and length, ear per plant, number of kernel row/ear, number of kernel/ear, number of kernel row, shelling percentage, silk receptivity and grain yield whereas as members of cluster 1were found most susceptible due to they had longer anthesis silking interval, with maximum tassel blast and leaf firing along with no grain yield under heat stress condition. From this study inbred lines RL-140, RML-76, RML-91 and RML-40 were found most tolerant to heat stress. These inbred lines belonging to superior cluster could be considered very useful in developing heat tolerant variety and other breeding activities.
Copyright (c) 2017 Manoj Kandel, Surya Kant Ghimire, Bishnu Raj Ojha, Jiban Shrestha
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
© The Authors
Authors retain the copyright of the published articles.
Under the Creative Commons Attribution-NonCommercial license, others than authors can remix, tweak, and build upon author’s work non-commercially, and although their new works must also acknowledge the author and be non-commercial, they don’t have to license their derivative works on the same terms.
All articles in the Journal of Maize Research and Development are licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. This license allows readers to
- Share — copy and redistribute the material in any medium or format
- Adapt — remix, transform, and build upon the material
- Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- NonCommercial — You may not use the material for commercial purposes.
The Author warrants that the Work:
- Has not been published before (except if included in an institutional pre-print server).
- Is not presently being considered for publication elsewhere.
- Does not violate any intellectual property right of any person or entity.
- Does not contain any subject matter that contravenes any laws (including defamatory material and misleading and deceptive material) and
- Meets ethical standards applicable to the research discipline.
They should warrant that the work and all figures, illustrations, photographs, charts, and other supplementary material are original. They declare that this manuscript has not been published elsewhere and submitted, nor will be submitted, to any other publication while consideration by the JMRD. There is no any plagiarism in this manuscript and no part of this manuscript (referenced or otherwise) has been copied verbatim. No one who has contributed significantly to the work has been denied authorship and those who helped have been duly acknowledged. All authors reviewed and approved the content and parts of this manuscript as submitted
This is a license agreement under which you, the author, retain copyright in your article, and grant the Journal of Maize Research and Development (hereinafter ‘the Publisher’) a license to allow the publisher to publish your article, including abstract, tables, figures, data, and supplemental material hosted by our publisher, as the Version of Record (VoR) in the Journal for the full period of copyright throughout the world, in all forms and all media.
Grant of publishing rights
The authors should grant the publisher this exclusive license to publish their article, in all forms and all media (whether known at this time or developed at any time in the future) throughout the world, in all languages, where their rights include but are not limited to the right to translate, create adaptations, extracts, or derivative works and to sublicense such rights, for the full term of copyright (including all renewals and extensions of that term), to take effect if and when the article is accepted for publication. The authors confirm that they have read and accept the full Terms and Conditions below including author warranties, and have read and agree to comply with the Journal’s policies on peer review and publishing ethics.
Click below link to download License to publish form;
Please read this above agreement carefully, complete it, and return a copy to us by email, fax, or hard copy immediately, to avoid any delay in the publication of your article.