Vegetative Growth and Yield Associated Flowering Time Variation in Sri Lankan Rice 'Hondarawala'
| Autor: | N. Dissanayake, Sudarshanee Geekiyanage, S. G. J. N. Senanayake, E. U. U. Rathnathunga, Saman Seneweera |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine Genetic diversity Vegetative reproduction business.industry Crop yield Dendrogram Biology Flowering time 01 natural sciences Agricultural and Biological Sciences (miscellaneous) Biotechnology 03 medical and health sciences Horticulture 030104 developmental biology Germination Negatively associated Yield (wine) business 010606 plant biology & botany |
| Zdroj: | Journal of Agricultural Sciences – Sri Lanka. 11:42-52 |
| ISSN: | 2386-1363 1391-9318 |
| DOI: | 10.4038/jas.v11i1.8079 |
| Popis: | 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. The Journal of Agricultural Sciences, vol.11, No 1, January 2016, pp.42-52 |
| Databáze: | OpenAIRE |
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