Estimation of some genetic parameters under plant density in sunflower
DOI:
https://doi.org/10.59658/jkas.v6i1.442Keywords:
genetic parameters, plant densities, sunflowerAbstract
The objectives of this experiment were to evaluate the performance of two varieties of sunflower (Helianthus annuus L.) with three plant densities (40, 50 and 60 thousands of plants.ha-1.) and estimate the phenotypic, genotypic and environment variation, phenotypic and genotypic coefficient of variation, heritability, stability and genetic resultant, for two seasons. The experiments were conducted during spring and fall seasons of 2013, using factorial experiment within RCBD with four replicates. The results showed the superiority of Shimoos variety, it gives seed yield 3.345 t.ha-1 compared with Aqmar variety which gave 2.375 t.ha-1 in spring season, at fall season Shimoos variety gave 6.265 t.ha-1, while Aqmar variety gave 5.379 t.ha-1. The yield increased with plant density increasing, it ranged from 2.425 to 3.222t.ha-1 in spring season and from 4.396 to 5.822t.ha-1 in fall season. The values of phenotypic stability were different according to differences between varieties and seasons. The high value was 93.75% for disc area followed by 90.13% for seed yield t.ha-1 for Aqmar in spring season and the higher value for Shimoos variety was 94.15 for disc area followed by 90.66% and 90.55% for 100 seed weight and number of seeds in disc respectively. . All values of genetic variation are higher than environment variation, and were closed to phenotypic variations for spring and fall seasons, except for seed number in disc in fall season which was less than environment variation. Hence the heritability for these traits were high and ranges from 63% for seed number in disc to 95% for shoot dry weight in spring season and from 33% for seed number in disc to 99.6% for disc area in fall season. So the genetic coefficient of variation for all traits is closed to phenotypic coefficient variation. The traits: plant growth rate and shoot dry weight for Aqmar, and leaf area index, plant growth rate and seeds yield for Shimoos showed non phenotypic stability in spring season. In fall season, seed yield t.ha-1 for Aqmar was the only trait non-phenotypic stable. The genetic results are ranged from 65.32% for shoot dry weight to 98.86% for seed number in disc for Aqmar and from 81.34% for seed number in disc to 114.79% for 100 seed weight for Shimoos in spring. In fall season, it ranges from 69.18 for leaf area index to 96.02% for seed number in disc for Aqmar and from 89.25% for seed number in disc to 107.32% for disc area for ShimoosIt is possible to conclude that Shimoos variety was superior in most of the traits. So we recommend planting Shimoos variety in the fall season, because it is more stable than Aqmar variety, while Aqmar variety can be cultivated in the spring season.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2019 Journal of Kerbala for Agricultural Sciences
This work is licensed under a Creative Commons Attribution 4.0 International License.
Licensing Terms
All articles are published under a Creative Commons License and will be directed to the Creative Commons Attribution 4.0 International License That permits use, distribution, and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
Use by non-commercial users
For non-commercial and non-promotional purposes individual users may access, download, copy, display, and redistribute the articles to colleagues, as well as adapt, translate, text- and data-mine the content subject to the following conditions:
- The author's moral rights are not compromised. These rights include the right of "paternity" (also known as "attribution" - the right for the author to be identified as such) and "integrity" (the right for the author not to have the work altered in such a way that the author's reputation, or integrity may be impugned).
- Where content in the article is identified as belonging to a third party, it is the obligation of the user to ensure that any reuse complies with the copyright policies of the owner of that content.
- If article content is copied, downloaded, or otherwise reused for non-commercial research and education purposes, a link to the appropriate bibliographic citation (authors, journal, article title, volume, issue, page numbers, DOI, and the link to the definitive published version on JKAS website) should be maintained.
- Copyright notices and disclaimers must not be deleted.
- Any translations, for which a prior translation agreement with JKAS has not been agreed, must prominently display the statement: "This is an unofficial translation of an article that appeared in an FSP publication. The publisher has not endorsed this translation."
Use by commercial "for-profit" organizations
Use of JKAS Open Access articles for commercial, promotional, or marketing purposes requires further explicit permission from JKAS (journal.agri@uokerbala.edu.iq) and will be subject to a fee.
The commercial purposes include:
Copying or downloading of articles, or linking to such articles for further redistribution, sale, or licensing; Copying, downloading, or posting by a site or service that incorporates advertising with such content; The inclusion, or incorporation of article content in other works, or services (other than normal quotations with an appropriate citation) that is then available for sale or licensing, for a fee (for example, a compilation produced for marketing purposes, inclusion in a sales pack); Use of article content (other than normal quotations with appropriate citation) by for-profit organizations for promotional purposes; Linking to article content in e-mails redistributed for promotional, marketing or educational purposes; Use for the purposes of monetary reward by means of sale, resale, license, loan, transfer or other form of commercial exploitation such as marketing products; Print reprints of articles can be purchased from journal.agri@uokerbala.edu.iq.
Permissions
- No special permission is required to reuse all, or part of the article published by JKAS, including figures and tables for non-commercial purposes.
- Any part of the article may be reused, for non-commercial purposes, without permission provided that the original article is cited.
- Reuse of an article does not imply endorsement by the authors, JKAS