DSpace Repository :: Browsing by Author "Samsudeen, K."

Browsing by Author "Samsudeen, K."

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3rd International Symposium on Coconut Research and Development
(2016) Chowdappa, P.; Muralidharan, K.; Samsudeen, K.; Rajesh, M.K.
Biology and cultivation of coconut
(2018) Samsudeen, K.
Characterization of Annur and Bedakam Ecotypes of Coconut from Kerala State, India, Using Microsatellite Markers
(2014-02) Rajesh, M.K.; Samsudeen, K.; Rejusha, P.; Manjula, C.; Shafeeq Rahman; Anitha Karun
Characterization of Kuttiyadi ecotype of coconut (Cocos nucifera L.) using morphological and microsatellite markers
(2014-12) Manjula, C.; Samsudeen, K.; Shafeeq Rahman; Rajesh, M.K.
West Coast Tall (WCT) is the most popular coconut cultivar grown by the farmers in Kerala, which occupies over 95 per cent of the area under coconut. The long history of coconut cultivation throughout Kerala state has resulted in the development of many ecotypes of WCT. The present work compares the similarity/diversity of the morphological and molecular characteristics of the Kuttiyadi ecotype growing in the hilly, midland region of Kozhikode District, Kerala with those of the WCT cultivar of the coastal region of Kasaragod District, Kerala, using vegetative, reproductive and fruit component characters and microsatellite markers. Geographically, these two locations show a wide range of variation for soil and climactic factors. The vegetative, reproductive and fruit component characteristics and microsatellite markers showed wide variations between selected WCT palms from Kasaragod and Kuttiyadi. The similarity index based on Dice’s coefficient, obtained after pair-wise comparison of Kuttiyadi and WCT samples with 15 SSR markers, revealed that the percentage similarity varied from the coefficient range 0.20 to 0.97 between the WCT and Kuttiyadi palms. UPGMA clustering clearly distinguished the two populations with WCT and Kuttiyadi forming separate clusters. STRUCTURE analysis was also carried out, which also showed that the two populations studied were distinct
Coconut (Cocos nucifera L.) Pollen Cryopreservation
(2014) Anitha Karun; Sajini, K.K.; Niral, V.; Amarnath, C.H.; Remya, P.; Rajesh, M.K.; Samsudeen, K.; Jerard, B.A.; Florent Engelmann
BACKGROUND: Coconut genetic resources are threatened by pests and pathogens, naturalhazards and human activities. Cryopreservation is the only method allowing the safe and costeffectivelong-term conservation of recalcitrant seed species such as coconut. OBJECTIVE: The objective of this work was to test the effect of cryopreservation and of cryostorage duration on coconut pollen germination and fertility. MATERIALS AND METHODS: Pollen of two coconut varieties (West Coast Tall WCT and Chowghat Orange Dwarf COD ) was collected in March-May over three successive years, desiccated to 7.5% moisture content (FW) and cryopreserved by direct immersion in liquid nitrogen. RESULTS: Germination and pollen tube length (PTL) of desiccated and cryopreserved pollen were not significantly different for both WCT and COD over the three harvest months of the three consecutive years of study. Pollen germination ranged from 24 to 32% in desiccated pollen whereas it was between 26 and 29% in cryopreserved COD pollen. In the case of WCT, germination ranged from 30 to 31% in desiccated pollen, while it was between 28 and 32% in cryopreserved pollen. PTL of cryopreserved pollen ranged between 224-390 m and 226-396 m for COD and WCT, respectively. Germination of COD pollen varied between 29.0 and 44.1% after 4 years and 1.0/1.5 years cryostorage, respectively. Germination of WCT pollen did not change significantly between 0 and 6 years cryostorage, being comprised between 32 (24 h) and 40 % (1.5 years). Germination and vigour of cryopreserved pollen were generally higher compared to that of pollen dried in oven and non-cryopreserved. Normal seed set was observed in COD and WCT palms using pollen cryostored for 6 months and 4 years. Cryopreserved pollen of five Tall and five Dwarf accessions displayed 24-31% and 25-49% germination, respectively. CONCLUSION: These results show that it is now possible to establish pollen cryobanks to contribute to coconut germplasm long-term conservation.
Coconut artificial pollination management system
(2017) Samsudeen, K.; Rajesh, M.K.; Sreejisha, P.; Nirmala, A.; Ranjith, L.M.R.; Deepa, K.
Coconut artificial pollination management system
(2017-04) Samsudeen, K.; Rajesh, M.K.; Sreejisha, P.; Nirmala, A.; L.M.R. Ranjith; Deepa, K.
Coconut breeding in India - Status and future prospects
(Coconut Development Board, 2006-05) Niral, V.; Samsudeen, K.; Kumaran, P.M.
Coconut variety Kalpa Dhenu
(2009) Niral, V.; Augustine Jerard, B.; Samsudeen, K.; Arunachalam, V.; Kumaran, P.M.; Ratnambal, M.J.; Rao, E.V.V.B.; Filial, R.V.; Satyabalan, K.; Nampoothiri, K.U.K.; Nair, M.K.; Bavappa, K.V.A.; Nair, R.V.; George V. Thomas; Kumar, M.; Meenakshi Ganesan, N.; Arulraj, S.
Coconut variety Kalpa Mitra
(2009) Niral, V.; Augustine Jerard, B.; Samsudeen, K.; Arunachalam, V.; Kumaran, P.M.; Ratnambal, M.J.; Rao, E.V.V.B.; Filial, R.V.; Satyabalan, K.; Nampoothiri, K.U.K.; Nair, M.K.; Bavappa, K.V.A.; Nair, R.V.; George V. Thomas; Bandopadhyay, A.; Ghosh, D.K.; Hore, J.K.; Sarangi, A.; Mitra, S.K.; Chattopadhyay, P.K.; Maity, S.C.; Arulraj, S.
Coconut variety Kalpa Pratibha
(2009-05) Niral, V.; Augustine Jerard, B.; Samsudeen, K.; Arunachalam, V.; Kumaran, P.M.; Ratnambal, M.J.; Rao, E.V.V.B.; Pillai, R.V.; Satyabalan, K.; Nampoothiri, K.U.K.; Nair, M.K.; Bavappa, K.V.A.; Nair, R.V.; George V. Thomas; Reddy, V.S.K.; Goutham, B.; Kalpana, M.; Raghava Rao, D.V.; Nageswarao, M.B.; Srinivasulu, B.; Vaithilingam, R.; Natarajan, C.; Kumar, M.; Meenakshi Ganesan, N.; Nagwekar, D.D.; Arulraj, S.;
Collecting coconut germplasm from Karnataka, lndia
(2000) Niral, V.; Samsudeen, K.; Augustine Jerard, B.; Kumaran, P.M.
Conservation and utilization of soft endosperm coconut accession from Andaman Islands
(2013-04) Jerard, B.A.; Damodaran, V.; Niral, V.; Samsudeen, K.; Rajesh, M.K.; Sankaran, M.
The recent genetic resources explorations undertaken in Andaman Islands revealed the occurrence of coconut palms yielding soft endosperm among the natural coconut population called Thairu thengai or Nei thengai. The characterization of Thairu thengai accession from Andaman Islands using the in situ observations on seven palms revealed that the palms belong to tall group of coconut.The palms of this type bear fruits with both normal and soft endosperm.About 16 to 27 per cent of the fruits per bunch were observed to be with soft endosperm and the remaining ones were with normal firm endosperm. The normal nuts of the identified palms produced poor quality copra indicating some degree of softness. The soft endosperm fruits are of three types with difference in the layers of soft endosperm, nut water and firm endosperm. The palms are found to occur sporadically in South Andaman. Although these palms appear morphologically looking similar to other coconut palms except for endosperm trait, differences could be observed for many morphological and fruit component traits. The morphological and fruit component traits of Thairu thengai coconut are compared with the other other coconut populations. The strategies for conservation and utilization of this novel type of coconut are proposed.
Decentralised planting material production in coconut
(2017-11) Samsudeen, K.; Thamban, C.
Development of a Dwarf x Tall coconut hybrid 'Kalpa samrudhi'
(2015-04) Augustine Jerard, B.; Niral, V.; Samsudeen, K.; Nair, R.V.; Jayabose, C.
An evaluation trial conducted over 28 years on coconut hybrid combinations has resulted in identification of a superior, high yielding Dwarf x Tall hybrid, named as ‘Kalpa Samrudhi’ involving IND 058S as female parent and IND 069S as male parent. The results revealed that the hybrid is better performing over other hybrids and local control with higher fruit yield (117 fruits palm-1 year-1), high copra out turn (25.72 kg palm-1 year-1 or 4.5 t ha-1 year-1 copra) and estimated oil recovery of 3.04 tonnes ha-1 under rainfed conditions of Kerala. The palms of the hybrid are semi tall, take an average of 45 months for initiation of flowering under rainfed conditions, possess good tender nut water quality (TSS 6o Brix) and higher quantity (346 mL per tender nut). The tender nut water has Na content of 35.1 ppm and K content of 2370 ppm. The hybrid recorded 30.27 per cent more nut yield, 66.05 per cent more copra yield and 73.71 per cent more oil yield over another released Dwarf x Tall hybrid ‘Chandra Sankara’. The seedlings of the hybrid are more vigorous, producing higher number of leaves within 12 months, having higher leaf area and dry weight indicating precocity in growth and development. The flowering, morphological and fruit component traits of the hybrid were compared with parental palms. The characteristics of this hybrid and its performance indicate potential to increase the production and productivity of coconut.
Diversity in Mohachao Narel, a Sweet Endosperm Coconut (Cocos nucifera L.) Population from Maharashtra, India
(2013-06) Samsudeen, K.; Rajesh, M.K.; Nagwaker, D.D.; Reshmi Raghavan; Ajith Kumar, P.; Devadas, K.; Anitha Karun
Mohachao Narel, a coconut variant characterized by sweet and soft kernel with less fibre content, has been reported from Guhaghar taluk of Ratnagiri district of Maharashtra State in India. Farmers of the area get a premium price for sweet endosperm nuts and the sweet kernel is mainly consumed directly. A total of 28 mother palms possessing nuts with sweet kernel have been identified in these areas. The number of nuts with sweet endosperm per bunch varies from 10 to 77 percent in these 28 palms. In this study, 12 palm characters including vegetative as well as reproductive characters, 14 fruit characters and 14 SSR loci, distributed uniformly throughout the coconut genome, were used to assess the genetic diversity of these palms. Palms exhibited 18 and 33 % coefficient of variation in vegetative and reproductive characters respectively. In the case of vegetative characters, highest variation was detected in plant height followed by number of leaf scars per meter. Among the reproductive characters, number of female flowers per bunch possessed highest amount of variation followed by number of nuts per bunch. Among the 14 fruit characters studied, high variation was observed in the weight of embryo, husk weight, copra weight and oil content. The 14 SSR loci detected a total of 35 alleles with an average of 2.5 alleles per primer. All the primers were 100 % polymorphic. The analysis microsatellite revealed that palms of sweet kernel type had only 45 % similarity among them indicating the existence of a high level of genetic diversity between the palms. The results can pave the way for devising strategies for conservation and management of the sweet kernel coconut population and their use in future breeding programmes.
Enhancing planting material production in coconut through decentralised community nurseries
(2022-07) Thamban, C.; Samsudeen, K.; Regi Jacob Thomas
Enhancing planting material production in coconut through decentralised community nurseries
(2020-10) Thamban, C.; Samsudeen, K.; Regi Jacob Thomas
Ensuring quality planting material for sustainable coconut production
(2017) Samsudeen, K.; Thamban, C.; Niral, V.; Chowdappa, P.
Evaluation of coconut germplasm for fruit component traits and oil yield
(2009) Niral, V.; Nair, R.V.; Augustine Jerard, B.; Samsudeen, K.; Ratnambal, M.J.

Browsing by Author "Samsudeen, K."

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