http://ir.lib.ruh.ac.lk/handle/iruor/19210 Sun, 26 Apr 2026 19:59:33 GMT 2026-04-26T19:59:33Z http://ir.lib.ruh.ac.lk/handle/iruor/19610 Germination potential of toddy palm (caryota urens), cardamom (elettaria cardamomum) and nutmeg (myristica fragrans) seeds under in vivo conditions Rodrigo, W.D.R.J.; Dahanayake, N.; Senanayake, S.G.J.N. Kithul (Caryota urens: Arecaceae), Cardamom (Elettaria cardamomum: Zingiberaceae) and Nutmeg (Myristica fragrans: Myristaceae) are three species having great export potential in Sri Lanka. Due to the hard seed coat the germination potential of these species are low. Therefore a study was undertaken to explore possibilities of improving the seed germination through mechanical, physical and chemical treatments and to develop a cost effective and rapid seed germination method. C. urens seeds when treated with 50% HNO3 for 5 minutes recorded the highest germination (85%) followed by 30% HNO3 for 5 min. (77.5%) and tepid water for 24h (75%) as compared to untreated control (10%) and other treatments. Seeds of E. cardamomum treated with 50% H2SO4 for 5min recorded the highest germination (65%) followed by 75% HNO3 for 10min (55%) and 75% HNO3 for 15min (45%). Nutmeg seeds treated with 0.5% KNO3 for 30 min. showed improved germination. The results obtained in this study will be useful for plant breeders and farmers who cultivate these species commercially. Mon, 04 Jun 2012 00:00:00 GMT http://ir.lib.ruh.ac.lk/handle/iruor/19610 2012-06-04T00:00:00Z http://ir.lib.ruh.ac.lk/handle/iruor/19609 Preparation of ready-to-serve beverage from tropical almond (terminalia cattappa) fruit pulp Weerasekara, W.M.R.A.B.; Rathnayaka, R.M.U.S.K.; Saranandha, K.H. Tropical Almond (Kottamba) is a locally available underutilized fruits which is rich in vitamins, pigments and antioxidants. In this research, ready to serve drink (RTS) was produced using ripened Tropical Almond fruits. PH, titrable acidity and Brix value of the ripen Tropical Almond fruits were determined using standard methods. Four RTS samples were prepared according to SLS standards with different Brix value as 60, 90, 120 and 150 . Sensory evaluation, microbial analysis, PH and titrable acidity measurements were done for fresh products as well as for products stored at ambient tempera ture for six months. Sensory evaluation was conducted by trained sensory panel subjectively using 7 point hedonic scale. Results were analyzed according to Friedman test at 95% level of significant. Proximate analysis was carried out for the best sample which was identified by the above tests. The selected best sample (Brix valve 120) gave acceptable results according to SLS standers in all tests per formed. In the proximate analysis, protein content and fiber content, for the best product, were found to be 0.043% and 0.82% respectively. There was no microbial colony formation observe even after six month of storage. Considering the results it was concluded that Tropical Almond fruit pulp can be used to produce RTS with acceptable qualities according to the SLS standards. Wed, 01 Aug 2012 00:00:00 GMT http://ir.lib.ruh.ac.lk/handle/iruor/19609 2012-08-01T00:00:00Z http://ir.lib.ruh.ac.lk/handle/iruor/19608 Preparation of ready-to-serve beverage from tropical almond (terminalia cattappa) fruit pulp Weerasekara, W.M.R.A.B.; Rathnayaka, R.M.U.S.K.; Saranandha, K.H. Tropical Almond (Kottamba) is a locally available underutilized fruits which is rich in vitamins, pigments and antioxidants. In this research, ready to serve drink (RTS) was produced using ripened Tropical Almond fruits. PH, titrable acidity and Brix value of the ripen Tropical Almond fruits were determined using standard methods. Four RTS samples were prepared according to SLS standards with different Brix value as 60 , 90, 120 and 150. Sensory evaluation, microbial analysis, PH and titrable acidity measurements were done for fresh products as well as for products stored at ambient temperature for six months. Sensory evaluation was conducted by trained sensory panel subjectively using 7 point hedonic scale. Results were analyzed according to Friedman test at 95% level of significant. Proximate analysis was carried out for the best sample which was identified by the above tests. The selected best sample (Brix valve 120) gave acceptable results according to SLS standers in all tests performed. In the proximate analysis, protein content and fiber content, for the best product, were found to be 0.043% and 0.82% respectively. There was no microbial colony formation observe even after six month of storage. Considering the results it was concluded that Tropical Almond fruit pulp can be used to produce RTS with acceptable qualities according to the SLS standards Wed, 01 Aug 2012 00:00:00 GMT http://ir.lib.ruh.ac.lk/handle/iruor/19608 2012-08-01T00:00:00Z http://ir.lib.ruh.ac.lk/handle/iruor/19607 Qtl analysis of dehydration tolerance at seedling stage in rice (oryza sativa l.) Ranawake, A.L.; Nakamura, C. Dehydration tolerant QTLs at the seedling stage in rice (Oryza sativa L.) was studied using green shoot length as a parameter, which was measured during the recovery period after dehydration stress. According to the results of pilot experiment carried out to evaluate the two parental rice cultivars for the level of dehydration tolerance, at 4 - day and 5-day dehydration stress, Japonica parent Hyogokithanishiki (HGKN) showed more tolerance than that of Hokuriku-142 Indica parent (HOK). Quantitative trait loci (QTLs) associated with dehydration tolerance was identified using 163 recombinant inbred lines derived from these parents on a linkage map constructed with 95 simple sequence repeat (SSR) markers. Three dehydration tolerant minor QTLs were identified on chromosome 1, 2 and 3 at composite interval mapping by WinQTLCARTOGRAHER. According to the additive effect plots the QTLs on chromosome 1 and 2 have the allelic effect from the Indica parent Hokuriku-142 and QTL on chromosome 3 has allelic effect from Hyogokithanishiki Japonica parent. However, according to the 1000 time permutation test, these QTLs didn’t exceed the threshold LOD valu Mon, 04 Jun 2012 00:00:00 GMT http://ir.lib.ruh.ac.lk/handle/iruor/19607 2012-06-04T00:00:00Z