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Chandran K.,Sugarcane Breeding Institute Research Center
Sugar Tech | Year: 2011

Saccharum edule is grown in Pacific islands for its edible, aborted inflorescence. This species is not amenable for conventional hybridization programme for improvement of sugarcane as it does not produce normal flowers. For in vitro multiplication of this species, immature inflorescence slices of 1 mm thick were inoculated on modified MS medium supplemented with 1 mg l-1 NAA + 2,4-D (5-50 mg l-1). Compact and nodular calli were observed in medium supplemented with 40 mg l-1 2,4-D. This calli were sub-cultured on medium supplemented with 1 mg l-1 NAA + BAP (2-10 mg l-1), good regeneration (327 shoots/Explant) were obtained. The regenerated plants were planted in field after rooting and hardening. The field grown plants were morphologically similar to the parental clones with similar aborted inflorescence. © 2011 Society for Sugar Research & Promotion. Source


Yadav R.P.,ICAR Vivekananda Parvatiya Krishi Anusandhan Sansthan | Bisht J.K.,ICAR Vivekananda Parvatiya Krishi Anusandhan Sansthan | Pandey B.M.,ICAR Vivekananda Parvatiya Krishi Anusandhan Sansthan | Kumar A.,Sugarcane Breeding Institute Research Center | Pattanayak A.,ICAR Vivekananda Parvatiya Krishi Anusandhan Sansthan
Applied Ecology and Environmental Research | Year: 2016

Tree growth and productivity are influenced by silvicultural strategies such as tree density and cutting management, which determine the potential of tree species to store carbon in the vegetation. A field experiment was conducted at Vivekananda Institute of Hill Agriculture, Almora, India in a 30-year-old Quercus leucotrichophora to evaluate the changes in vegetation carbon pools as a function of four cutting management (1m, 2m, local practice, and above 1/3rd part undisturbed), under high density plantation (1.0m × 1.0m). Tree cutting management significantly (<0.01) influenced the carbon stocks of Q. leucotrichophora trees. Total vegetation (aboveground + below ground) carbon stock was highest for the above 1/3rd part undisturbed (356.9 Mg ha-1) and lowest in the cutting at 1m (86.7 Mg ha-1). Overall, less disturbance to stands promote carbon storage, but intense cutting management (e.g., cutting at 1m) may adversely affect tree growth and productivity, reducing vegetation carbon pools. Cutting management effects are very much visible on carbon stock of Q. leucotrichophora under high density plantation. By extension, stand cutting exerts negative or positive feedbacks on biomass accretion, which may also influence the amount of carbon sequestered by the trees. © 2016, ALÖKI Kft., Budapest, Hungary. Source


Mahesh P.,Sugarcane Breeding Institute Research Center | Chandran K.,Sugarcane Breeding Institute Research Center | Srikanth J.,Sugarcane Breeding Institute | Nisha M.,Sugarcane Breeding Institute Research Center | Manjunatha T.,Sugarcane Breeding Institute Research Center
Sugar Tech | Year: 2013

The pink stem borer Sesamia inferens (Walker) (Lepidoptera: Noctuidae) has attained pest status in recent years in the world collection of sugarcane germplasm maintained at the Sugarcane Breeding Institute Research Centre, Kannur, Kerala state, India. With a view to identify sources of resistance to the hitherto minor pest, which occurs during the early stage (March-June) of crop growth, the flowering accessions of Saccharum officinarum L. from the germplasm collection were screened against the borer under natural conditions for three consecutive years (2010-2013). Deadheart incidence was used as the parameter for screening and the genotypes were graded in four categories based on the level of incidence. Among all accessions across the years, the minimum incidence of the borer (1.47 %) was recorded in NG 77-93 while the maximum (29.41 %) was in 57 NG 111. Almost all the accessions harboured pink borer infestations with only one or two exceptions in individual years. Grouping of accessions on the basis of deadheart showed 17 (15.45 %) as resistant, 50 (45.45 %) as moderately resistant, 36 (32.72 %) as susceptible and 7 (6.36 %) as highly susceptible. Of the total accessions screened, New Guinea, Indonesia and Mauritius collections contributed 9.09 % (ten clones), 5.45 % (six clones) and 0.91 % (one clone) respectively to the resistant grade. The study also indicated that pink borer infestation starts in March, peaks by third week of May, gradually declines after the onset of monsoon and reaches the minimum by the second week of June. Nearly 60 % genotypes that showed resistance/moderate resistance to pink borer can serve as potential donors for resistance breeding programmes after confirmation using laboratory screening methods. © 2013 Society for Sugar Research & Promotion. Source


Mahesh P.,Sugarcane Breeding Institute | Srikanth J.,Sugarcane Breeding Institute | Chandran K.,Sugarcane Breeding Institute Research Center | Nisha M.,Sugarcane Breeding Institute Research Center | Balan S.,Sugarcane Breeding Institute Research Center
International Journal of Pest Management | Year: 2015

Biology, damage pattern, incidence levels and status of the leaf miner Aphanisticus aeneus Kerremans (Coleoptera: Buprestidae) were studied in accessions of Saccharum spp. Egg, grub and pupal periods of the miner lasted 6.0 ± 0.8, 18.5 ± 1.9 and 7.0 ± 1.3 days, respectively; adults lived for 8–10 days. The grub tunneled the leaf on the lower surface just above the epidermis forming a linear channel; infested tissues showed brownish discoloration. The extent of leaf miner attack among the 331 accessions of Saccharum spp. ranged 4.00%–76.47% on cane basis and 7.14%–100.00% on leaf basis; the mined leaf area ranged 3.22–11.00 cm2. When the accessions were grouped on the basis of an infestation index developed with the above three parameters, 267 occupied very low category, 51 were in low category, 11 were in moderate category and 2 were placed in high incidence category. All accessions showed miner attack in at least one study year. Within each of the four Saccharum spp., accessions differed significantly among the three study years for all infestation parameters. Among the four species, while S. robustum accessions recorded significantly highest infestation index, the other three species remained on par. © 2014, Taylor & Francis. Source


Mahesh P.,Sugarcane Breeding Institute Research Center | Chandran K.,Sugarcane Breeding Institute Research Center | Manjunatha T.,Sugarcane Breeding Institute Research Center | Balan S.,Sugarcane Breeding Institute Research Center
Sugar Tech | Year: 2013

A leaf miner, Aphanisticus aeneus Kerremans (Coleoptera: Buprestidae), grub mining the sugarcane leaves results in destruction of leaf mesophyll. The incidence of the leaf miner A. aeneus infestation under natural conditions was recorded on 954 sugarcane genotypes maintained in the field gene bank of Sugarcane Breeding Institute Research Centre at Kannur. The leaf miner infestation was noticed from the first week of June to last week of August and the incidence ranged from 7. 4 % (57 NG 202) to 62. 5 % (57 NG 213) on leaf basis and 0. 0-75 % on cane basis. None of the genotypes showed severe incidence range (81-100 %), however 4. 93 % of genotypes were totally free from infestation (0-0 %). Among the Saccharum species, S. officinarum clones recorded the highest number of infested canes and leaves while it was the least in S. sinense and S. barberi clones. The number and length of mines was also more in S. officinarum clones and least in S. sinense. © 2012 Society for Sugar Research & Promotion. Source

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