Vegetative growth and yield associated flowering time variation in Sri Lankan rice 'Hondarawala'
Article
Article Title | Vegetative growth and yield associated flowering time variation in Sri Lankan rice 'Hondarawala' |
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Article Category | Article |
Authors | Ranathunga, E. U. U. (Author), Senanayake, S. G. J. N. (Author), Dissanayake, N. (Author), Seneweera, S. (Author) and Geekiyanage, S. (Author) |
Journal Title | Journal of Agricultural Sciences - Sri Lanka |
Journal Citation | 11 (1), pp. 42-52 |
Number of Pages | 11 |
Year | 2016 |
Publisher | Sabaragamuwa University of Sri Lanka |
Place of Publication | Sri Lanka |
ISSN | 2386-1363 |
1391-9318 | |
Digital Object Identifier (DOI) | https://doi.org/10.4038/jas.v11i1.8079 |
Web Address (URL) | http://jas.sljol.info/articles/abstract/10.4038/jas.v11i1.8079/ |
Abstract | Breeding new varieties adaptable for changing climate is an essential need in sustainable rice production. Around 2000 Sri Lankan rice accessions at Plant Genetic Resources Centre (PGRC), Sri Lanka have not been fully characterized for the yield potential and sensitivity to mild photoperiodic differences for days to flowering (DF). DF is a candidate key determinant in yield components in rice and understanding the physiological and molecular nature for DF is important to manipulate crop yield through breeding programmes. The objective of this study was to assess the genetic diversity of 15 Hondarawala accessions from PGRC using selected 37 morphological characters and DF. DF varied from 58-189 days while accession number 3988 did not flower until 200th day of seed germination. Principal Component Analysis (PCA) revealed that four principle components (PA) explained 86.5% of total observed variation. Variation of DF positively associated with most of morphological characters of vegetative growth while a few characters were negatively associated. In the dendogram, 10 clusters formed at rescale distance of 5. Widely variable DF accessions distributed among clusters. |
Keywords | days to flowering; genetic diversity; morphological characters; Sri Lankan rice |
ANZSRC Field of Research 2020 | 410203. Ecosystem function |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Ruhuna, Sri Lanka |
Ministry of Agriculture, Sri Lanka | |
Centre for Crop Health | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q35w8/vegetative-growth-and-yield-associated-flowering-time-variation-in-sri-lankan-rice-hondarawala
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