Browsing by Author "Iyer, R.D."
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Item Anther-culturing and agriculture — problems and prospects(1977) Iyer, R.D.Item Biotech-breeding for plantation crop improvement(1995-06) Iyer, R.D.Item Biotech-breeding for plantation crop improvement(2007-02-08) Iyer, R.D.Item Biotechnology - Engineering plantation crops for future(1999) Iyer, R.D.; Parthasarathy, V.A.Item Breeding Methodology as Applicable to Coconut Improvement(1984) Iyer, R.D.; Satyabalan, K.; Bhaskara Rao, E.V.V.; Sukumaran, C.K.Item CGDxWCT hybrid - an ideal planting material for root (wilt) disease endemic areas(2007-02-08) Jacob, P.M.; Iyer, R.D.; Nair, R.V.; Nampoothiri, K.U.K.Item Coconut embryo culture - Protocol for germplasm collection(CPCRI, 2002-10) Anitha Karun; Parthasarathy, V.A.; Kumaran, P.M.; Iyer, R.D.; Sajini, K.K.Item Coconut plantlets from leaf tissue cultures(1984-06) Raju, C.R.; Prakash Kumar, P.; Mini Chandramohan; Iyer, R.D.Item Coconut plantlets from leaf tissue cultures(2007-02-08) Raju, C.R.; Prakash Kumar, P.; Mini Chandramohan; Iyer, R.D.Item Coconut tissue culture in India: Status and prospects(2007-02-08) Iyer, R.D.The first report of successful induction of somatic embryoids and their subsequent organisation into clonal plantlets was from CPCRI in 1984. Using tender leaf segments from one to two-year old WCT seedlings, somatic embryoids were induced in 16 weeks on a modified Y-3 medium supplemented with high levels of auxin (NAA), inositol and casein hydroiysate. After a process of hardening, four of these plantlets have been successfully field planted in January 1989 and are growing well. More recently, with a view to reproducing the above success with mature palm tissues, a non-destructive method of tissue extraction has been standardised. Rachilla explants have so far given only shoot-like outgrowths, but no true leaves yet, whereas anther culture gave only multi-celled pollen embryoids.Item DEPUTATION REPORT ON VISIT TO DACCA, BANGLADESH(1981-12) Iyer, R.D.Item Diamond jubilee celebrations of coconut research in India: Recommendations(2007-02-08) Iyer, R.D.; Nayar, N.M.; Bavappa, K.V.A.Item Diamond jubilee celebrations of coconut research in India: Recommendations(1977-06) Iyer, R.D.; Nayar, N.M.; Bavappa, K.V.A.Item Embryo and Tissue Culture for Crop Improvement, Especially of Perennials, Germplasm Conservation and Exchange - Relevance to Developing Countries(1981) Iyer, R.D.Plant tissue and organ culture techniques are increasingly applied for the improvement of economically important crops in the developing countries. Work done at this Institute on coconut spathe tissue and embryo culture, as well as turmeric tissue culture for rapid multiplication of superior clones, is briefly described. The application of tissue and organ culture in other crops, especially the perennials, like agricultural plantation crops, forest trees and horticultural plants is briefly reviewed with regard to (a) the conservation and international exchange of germplasm, especially of bulky seeded materials like coconut and vegetatively propagated ones like tapioca, potato and certain fruit trees; (b) clonal multiplication of elite materials; (c) induction of haptoids; (d) induction of mutations and rare recombinations and (e) embryo culture. The rapid advances made in tissue, cell and organ culture hold great promise for their immediate application to problems in the developing countries where bulk of the farm holdings for most crops fall below one hectare. Hence, any advance towards improving the yield or disease resistance of the planting materials, made through the use of tissue culture techniques is sure to benefit the farmers.Item Embryo and tissue culture for Crop Improvement, especially of perennials, germplasm conservation and exchange — Relevance to developing countries(2007-02-08) Iyer, R.D.Plant tissue and organ culture techniques are increasingly applied for the improvement of economically important crops in the developing countries. Work done at this Institute on coconut spathe tissue and embryo culture, as well as turmeric tissue culture for rapid multiplication of superior clones, is briefly described. The application of tissue and organ culture in other crops, especially the perennials, like agricultural plantation crops, forest trees and horticultural plants is briefly reviewed with regard to (a) the conservation and international exchange of germ-plasm, especially of bulky seeded materials like coconut and vegetatively propagated ones like tapioca, potato and certain fruit trees; (b) clonal multiplication of elite materials; (c) induction of haploids; (d) induction of mutations and rare recombinations and (e) embryo culture. The rapid advances made in tissue, cell and organ culture hold great promise for their immediate application to problems in the developing countries where bulk of the farm holdings for most crops fall below one hectare. Hence, any advance towards improving the yield or disease resistance of the planting materials, made through the use of tissue culture techniques is sure to benefit the farmers.Item An evaluation of tissue culture techniques in coconut and turmeric(2007-02) Kuruvinashetti, M.S.; Iyer, R.D.In vitro studies in coconut and turmeric were undertaken with the main objectives of achieving rapid multiplication of elite genotypes. In coconut a stage in the development of flower primordia was standardised for their conversion into vegetative structures onY3 medium supplemented with 2mg/l BAP 0.5 mg/l Kinetin. Shoot-like structures were produced on the rachilla explants excised from the spadices which were extracted from the axils of first (mainly) to third open leaves on the crown. Rooting of these structures was not regular. Calli were induced from stem and petiole explants of one year old WCT seedlings on ¥3 medium supplemented with 0,5 to 1-0 mg/l. 2,4-D. Culture of isolated embryos was done on MS medium supplemented with 200 mg/l. KCl. Embryos took four months to attain the first open leaf stage. Rooting of the seedlings was not regular. Seedlings when grown on liquid medium supplemented with 1 mg/l IBA produced roots. In turmeric, a tissue culture method for rapid multiplication of clone 15 B was developed. On MS medium supplemented with 0.2 mg/l kinetin and 0. 4mg/l BAP, the rate of multiplication was of the order of eight plantlets from every bud cultured for two months, which works out to over two lakh plantlets per bud per year. For initiating callus cultures, buds were grown on the same medium supplemented with 2 mg/l IAA or 0.5 mg/l 2, 4-D in dark. These calli were soft and friable. When exposed to light, IAA induced calli underwent differentiation to produce several plantlets. These plantlets could be separated and grown further before they were transplanted to polybags. These plants are growing very vigorously in the glasshouse for the last 8 months.Item Heterosis breeding in coconut - Past, present and future(2007-02) Dhamodaran, S.; Viraktamath, B.C.; Iyer, R.D.The coconut improvement programme through breeding was initiated in the early part of the current century. The discovery of hybrid vigour in coconut in India by Patel (1937) was a significant landmark in the history of coconut improvement. Subsequently, systematic efforts were made in Sri Lanka, Ivory Coast and Jamaica which led to the successful exploitation of hybrid vigour in coconut. Selection of elite parental palms, testing their combining ability and establishing seed gardens with promising parental lines for hybrid seed production, are the important steps in heterosis breeding. The desired traits both from Dwarf and Tall parents are brought together in hybrids. Due to the concerted efforts of coconut breeders many hybrids have been relesedfor cultivation in different coconut growing countries. Notable among them is the Ivory Coast hybridMAWA ofl.R.H.O., whichhas been widely distributed in different S.E. Asian countries like Indonesia, Thailand, Malaysia, Philippines etc. The historical background of heterosis breeding, present status and future programmes envisaged in various coconut growing countries have been reviewed in this paper.Item Heterosis breeding in coconut - Past, present and future(1992-05) Dhamodaran, S.; Viraktamath, B.C.; Iyer, R.D.The coconut improvement programme through breeding was initiated in the early part of the current century. The discovery of hybrid vigour in coconut in India by Patel (1937) was a significant landmark in the history of coconut improvement. Subsequently, systematic efforts were made in Sri Lanka, Ivory Coast and Jamaica which led to the successful exploitation of hybrid vigour in coconut. Selection of elite parental palms, testing their combining ability and establishing seed gardens with promising parental lines for hybrid seed production, are the important steps in heterosis breeding. The desired traits both from Dwarf and Tall parents are brought together in hybrids. Due to the concerted efforts of coconut breeders many hybrids have been relesedfor cultivation in different coconut growing countries. Notable among them is the Ivory Coast hybrid MAWA of l.R.H.O., which has been widely distributed in different S.E. Asian countries like Indonesia, Thailand, Malaysia, Philippines etc. The historical background of heterosis breeding, present status and future programmes envisaged in various coconut growing countries have been reviewed in this paper.Item Heterosis breeding in coconut - Past, present and future(Journal of Plantation Crops 19 (2) : 70-80 December.. 1991, 1991-12) Dhamodaran, S.; Viraktamath, B.C.; Iyer, R.D.The coconut improvement programme through breeding was initiated in the early part of the current century. The discovery of hybrid vigour in coconut in India by Patel (1937) was a significant landmark in the history of coconut improvement. Subsequently, systematic efforts were made in Sri Lanka, Ivory Coast and Jamaica which led to the successful exploitation of hybrid vigour in coconut. Selection of elite parental palms, testing their combining ability and establishing seed gardens with promising parental lines for hybrid seed production, are the important steps in heterosis breeding. The desired traits both from Dwarf and Tall pareuts are brought together in hybrids. Due to the concerted efforts of coconut breeders many hybrids have been released for cultivation in different coconut grOWing countries. Notable among them is the Ivory Coast hybrid MAWA of I.R.H.O., which has been widely distributed in different S. E. Asian countries like Indonesia, Thailand, Malaysia, Philippines etc. The historical background of heterosis breeding, present status and future programmes envisaged in various coconut growing countries have been reviewed in this paper.Item High yielding coconut cultivars and hybrids(2007-02) Ratnambal, M.J.; Bhaskara Rao, E.V.V.; Iyer, R.D.