Study on Morphological Traits of Wild Rice Species Collected from Different Agro ecological Regions in Sri Lank

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dc.contributor.author Tennakoon, T.M.S.A.
dc.contributor.author Sandamal, P.S.
dc.contributor.author Ratnasekera, D.
dc.contributor.author Amarasekera, D.A.B.N.
dc.date.accessioned 2022-08-10T06:15:17Z
dc.date.available 2022-08-10T06:15:17Z
dc.date.issued 2019-02-28
dc.identifier.issn 1800-4830
dc.identifier.uri http://ir.lib.ruh.ac.lk/xmlui/handle/iruor/7429
dc.description.abstract Wild relatives of genus Oryza play an important role in rice breeding program worldwide. To achieve sustainable crop improvement, wild relatives of rice are important as a genetic resource. The objective of this study was to explore the promising traits in species identification to distinguish wild rice species in Sri Lanka in terms of morphology. In this study, the rootstocks of five wild rice species (O. nivara, O. rufipogon, O. eichingeri, O. rhizomatis and O. granulata) available in Sri Lanka were collected from their natural populations representing different ecological conditions. To search for variation patterns and distinguish features which can be utilized for identification among species, plants were established in a common garden. Morphological diversity was measured by 11 quantitative traits following rice descriptor of IRRI. A considerable variation of morphological characteristics was found among the five wild rice species for the most of the traits measured. The results of the analysis of variance indicated that the total evaluated quantitative traits showed more variations among the species (P<0.05). The significantly highest plant height (184.75 cm) with seedling height (100.00 cm), culm length (152.25 cm) and culm diameter (7.3 mm) were showed in O. rufipogon. In contrast, O. nivara had significantly the highest grain width (2.625 mm) and 100-grain weight (1.955 g) compared to the other species. However, O. eichingeri and O. rhizomatis had a lower value of 100-grain weight than the other species. Whereas both O. rufipogon and O. nivara exhibited, significantly the highest flag leaf length and grain length than the other species. Moreover, flag leaf width of the O. nivara and O. rufipogon were significantly lower than the other species. In contrast, O. granulata had significantly larger flag leaf width (2.05 cm) but significantly the lowest plant height, culm diameter, panicle length, and flag leaf length compared to the other species. O. eichingeri exhibited significantly the shortest culm length (42.0 cm). Therefore, the morphological diversity information of wild rice species could be useful in rice breeding program and species identification in field level. en_US
dc.language.iso en en_US
dc.publisher Faculty of Agriculture, University of Ruhuna, Sri Lanka en_US
dc.relation.ispartofseries ISAE 2019;
dc.subject Diversity, en_US
dc.subject Field identification en_US
dc.subject Quantitative traits en_US
dc.subject Wild rice en_US
dc.title Study on Morphological Traits of Wild Rice Species Collected from Different Agro ecological Regions in Sri Lank en_US
dc.type Article en_US


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