Dr. Natarajan  Sivaraj

Dr. Natarajan Sivaraj

Research Scientist
ICAR-National Bureau of Plant Genetic Resources, India


Highest Degree
Ph.D. in Botany from Bharathidasan University, India

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Biography

Born in Madurai of Tamil Nadu in 1962, Dr. N. Sivaraj had his schooling in the same town and graduated in Chemistry and Botany in 1983 from the Madura College, Madurai, securing a first rank. Subsequently, he joined Saraswathi Narayanan College, Madurai for pursuing M.Sc., and M.Phil. degree courses in Botany. He pursued his doctoral degree programme at Bharathidasan University and obtained his Ph.D. in 1991. Dr. Sivaraj was selected for the Scientist position through Agricultural Research Service of Indian Council of Agricultural Research, Ministry of Agriculture, Government of India and posted to National Bureau of Plant Genetic Resources, Regional Station, Hyderabad.

Ever since his joining in NBPGR in 1994, Dr. Sivaraj has been actively associated with plant genetic resources (PGR) activities especially, Germplasm exploration & collection, characterization, evaluation, documentation and conservation in the South East Coastal zone of India. He has led over 19 germplasm collection missions and collected around 1900 samples of agri-horticultural crop and their wild relatives. He has characterized over 1000 accessions of brinjal, linseed, sesame, horsegram and jack bean germplasm & associated with the identification of superior genotypes and registration of promising genetic stocks with ICAR/NBPGR, notably, Linseed (2) cowpea (1), Jatropha (2), Chilli (3), sorghum (1), greengram (1), blackgram (1), bottle gourd (1), and Dolichos bean (1). He has been trained in CIAT, Colombia for Geographical Information System applications for PGR management and at Netherlands for PGR management. To his credit, he has over 200 research papers on contemporary PGR issues published in peer reviewed journals, book chapters, technical articles, abstracts and others.

Dr. Sivaraj is a Fellow of Indian Society of Oilseeds Research (Hyderabad) and member of many professional Societies including Indian Society of Plant Genetic Resources (New Delhi), Medicinal and Aromatic Plants Association of India (MAPAI), Swamy Botanical Club (Tiruchirapalli), Bharatiya Vidhya Bhavan (Mumbai) and others. He has received many honours/awards viz., SL Narasimha Iyengar Prize, Proficiency prize in M. Phil., Talented Scientist award by International Conference on Medicinal Plants and Herbal Products etc.

Area of Interest:

Plant and Soil Sciences
100%
Agriculture
62%
Botany
90%
Plant Ecology
75%
Geographic Information Systems
55%

Selected Publications

  1. Sunil, N., S.R. Pandravada, M.T. Reddy, N. Sivaraj, V. Kamala and S.K. Chakrabarty, 2015. Green leafy vegetables from two traditional agro-ecosystems of Peninsular India-their documentation and relevance. Agric. Sci. Digest Res. J., 35: 19-24.
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  2. Sultan, S.M., N. Dikshit and N. Sivaraj, 2015. Diversity, distribution and conservation of saffron thistle (Carthamus lanatus L.) in mid-high altitude temperate zone of Jammu and Kashmir, India: A DIVA-GIS study. Trop. Ecol., 56: 303-310.
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  3. Sankar, A.U., K. Anitha, N. Sivaraj, K.M. Kumari, N. Sunil and S.K. Chakrabarty, 2015. Screening of horsegram germplasm collected from Andhra Pradesh against anthracnose. Legume Res. Int. J., Vol. 38. 10.18805/lr.v38i6.6719.
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  4. Reddy, M.T., H. Begum, N. Sunil, S.R. Pandravada, N. Sivaraj and S. Kumar, 2015. Mapping the climate suitability using MaxEnt modeling approach for Ceylon spinach (Basella alba L.) cultivation in India. J. Agric. Sci., 10: 87-97.
  5. Reddy, M.T., H. Begum, N. Sunil, S.R. Pandravada and N. Sivaraj, 2015. Assessing climate suitability for sustainable vegetable roselle (Hibiscus sabdariffa var. sabdariffa L.) cultivation in India using MaxEnt model. Agric. Biol. Sci. J., 1: 62-70.
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  6. Reddy, M.T., H. Begum, N. Sunil, P.S. Rao, N. Sivaraj and S. Kumar, 2015. Predicting potential habitat distribution of sorrel (Rumex vesicarius L.) in India from presence-only data using maximum entropy model. Open Access Library J., 2: 1-11.
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  7. Rameash, K., N. Sivaraj, B.S. Babu and S.K. Chakrabarty, 2015. Screening brinjal genotypes for resistance to shoot and fruit borer, Leucinodes orbonalis and analysing the geographical divergence of resistance through DIVA-GIS. Bioscan, 10: 923-928.
  8. Raina, A.P., Z. Abraham and N. Sivaraj, 2015. Diversity analysis of Kaempferia galanga L. germplasm from South India using DIVA-GIS approach. Ind. Crops Prod., 69: 433-439.
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  9. Pandravada, S.R., M. Thirupathi Reddy, N. Sivaraj, R. Jairam, N. Sunil, S.K. Chakrabarty and I.S. Bisht, 2015. Preliminary characterization and evaluation of on-farm conserved okra germplasm from tribal pockets of Telangana. Ann. Plant Soil Res., 17: 342-345.
  10. Medagam, T.R., H. Begum, N.H. Rao, S. Neelam, S.R. Pandravada and S. Natarajan, 2015. Genetic diversity and variability in landraces for key agro-economic traits in vegetable roselle (Hibiscus sabdariffa var. sabdariffa L.). Jordan J. Biol. Sci., 8: 113-125.
  11. Lenkala, P., R.R. Rani, N. Sivaraj, K.R. Reddy and M.J. Prada, 2015. Morphological characterization of Jackbean-An under exploited vegetable. Ann. Plant Soil Res., 17: 183-186.
  12. Lenkala, P., K.R. Rani, N. Sivaraj, K.R. Reddy and M.J. Prada, 2015. Genetic variability and character association studies in Jack bean (Canavalia ensiformis (L.) DC.) for yield and yield contributing traits. Electr. J. Plant Breeding, 6: 625-629.
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  13. Lenkala, P., K.R. Rani, N. Sivaraj, K.R. Reddy and M. Jayaprada, 2015. Evaluation of jack bean genotypes for growth and yield characters. Ann. Plant Soil Res., 17: 311-313.
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  14. Lenkala, P., K.R. Rani, N. Sivaraj, K.R. Reddy and M. Jayaprada, 2015. Assessment of jack bean genotypes for seed characters and nutritional quality. Ann. Plant Soil Res., 17: 395-398.
  15. Dikshit, N. and N. Sivaraj, 2015. Analysis of agro-morphological diversity and oil content in Indian linseed germplasm. Grasas y Aceites, Vol. 66. 10.3989/gya.0689141.
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  16. Chand, D., N. Dikshit, N. Sivaraj and A.D. Sharma, 2015. Exploiting Resistance Gene of Cucumis sativus L. var. Hardwickii Germplasm in Cucumber improvement. Biotech. .
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  17. Abraham, B., M. Vanaja, P.R.R. Reddy, N. Sivaraj and S.K. Chakrabarty, 2015. Cluster analysis and maxent modelling of black gram [Vigna mungo (L.)Hepper] genotypes from Andhra Pradesh, India. Vegetos, 28: 119-126.
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  18. Varaprasad, S.K., N. Sivaraj and S.R. Pandravada, 2014. Exploring Potential of Native Landraces for Rice Improvement. In: New Frontiers in Rice Breeding for Improving Yield, Quality and Stress Tolerance for Sustaining Future Production, Bhadana, V.J., G.S.V. Prasad and P. Muthuraman (Eds.). Directorate of Rice Research, Hyderabad, pp: 22-26.
  19. Sunil, N., V. Kumar, B. Abraham, N. Sivaraj and K.S. Varaprasad, 2014. Branching-a tool for identification of promising genotypes in Jatropha? Thai J. Agric. Sci., 47: 23-30.
  20. Sunil, N., S.R. Pandravada, N. Sivaraj, J. Reddy, S.K. Chakrabarty, J. Ashok and I.S. Bisht, 2014. Diversity in the landraces of green gram (Vigna radiata (L) R. Wilczek. collected from tribal communities of peninsular India. J. Biodiversity, 114: 392-400.
  21. Sunil, N., M.T. Reddy, B. Hameedunnisa, P.S. Rao and N. Sivaraj et al., 2014. Diversity in bottle gourd (Lagenaria siceraria-(Molina) Standl.) germplasm from Peninsular India. Electr. J. Plant Breeding, 5: 236-243.
  22. Sultan, S.M., S.A. Dar, S.A. Dand and N. Sivaraj, 2014. Diversity of common bean in Jammu and Kashmir, India: A DIVA-geographic information system and cluster analysis. J. Applied Nat. Sci., 6: 226-233.
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  23. Sivaraj, N., V.P. Bhadana, S.G. Ram, S.H. Ramakrishnan and A.J. Joel et al., 2014. Collection and conservation of cold adapted indigenous rice landraces from western Ghats, South India. Indian J. Plant Genet. Resour., 27: 59-62.
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  24. Sivaraj, N. and S.K. Chakrabarty, 2014. Agrobiodiversity: Status and Conservation Strategies in India. In: Biodiversity Conservation Present Status, Rao, K.R.S.S. and M.A. Lakshmi (Eds.). Department of Zoology, J.M.J. College for Women, Guntur, Andhra Pradesh, India, pp: 85-106.
  25. Reddy, M.T., H. Begum, N. Sunil, P.S. Rao, N. Sivaraj and S. Kumar, 2014. Preliminary characterization and evaluation of landraces of Indian spinach (Basella spp. L.) for agro-economic and quality traits. Plant Breeding Biotechnol., 2: 48-63.
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  26. Rathnam, K., N. Sivaraj and A. Shankar, 2014. Effect of salt stress on chlorophyll and carotenoid contents of roselle (Hibiscus sabdariffa L.) landraces. Progressive Res., 9: 242-245.
  27. Pandravada, S.R., N. Sivaraj, V. Kamla, N. Sunil and S.K. Chakrabarty, 2014. PSRKK-11287 (IC0436231; INGR 14040), a Chilli (Capsicum annuum) Germplasm with purple phenotype as a morphological marker. Indian J. Plant Genet. Resour., 27: 314-315.
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  28. Pandravada, S.R., N. Sivaraj, R. Jairam, N. Sunil and H. Begum et al., 2014. Luffa hermaphrodita: First report of its distribution and cultivation in Adilabad, Andhra Pradesh, South India. Asian Agri-History, 18: 123-132. Asian Agri-History, 18: 123-132.
  29. Nizar, M.A., N. Dikshit and N. Sivaraj, 2014. DIVA-geographic information system approaches for assessment of diversity and distribution pattern of Abelmoschus species from Maharashtra, India. Adv. Applied Res., 6: 28-34.
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  30. Neelam, S., V. Kumar, S. Natarajan, K. Venkateshwaran and S.R. Pandravada, 2014. Evaluation and diversity observed in horsegram (Macrotyloma uniflorum (Lam) Verdc.) Germplasm from Andhra Pradesh, India. Int. J. Plant Res., 4: 17-22.
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  31. Natarajan, S., V. Kamala, S.R. Pandravada, N. Sunil and M. Elangovan et al., 2014. Floristic ecology and phenological observations on the Medicinal flora of Southern Eastern Ghats, India. Open Access J. Med. Aromatic Plants, 5: 5-22.
  32. Kamala, V., T.S. Aghora, N. Sivaraj, T. Rao and S.R. Pandravada <et al., 2014. Germplasm collection and diversity analysis in Yardlong Bean (Vigna unguiculata subsp. sesquipedalis) from coastal Andhra Pradesh and Odisha. Indian J. Plant Genet. Resour., 27: 171-177.
  33. Kamala, V., A.J. Gupta, A.S. Rajput, N. Sivaraj and S.R. Pandravada et al., 2014. Diversity in bulb traits in onion germplasm collected from Chhattisgarh and Maharashtra. Indian J. Hortic., 71: 499-504.
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  34. F. Aliya, H. Begum, M.T. Reddy, N. Sivaraj, S.R. Pandravada, G. Narshimulu 2014. Correlation and Path Coefficient Analysis of Quantitative Characters in Spine Gourd (Momordica dioica Roxb.) Pak. J. Biol. Sci., 17: 659-666.
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  35. Dikshit, N., V.K. Gite and N. Sivaraj, 2014. In-situ assessment of phenotypic diversity in Cajanus scarabaeoides (L.) Thouars. Ecoscan, 8: 263-267.
  36. Dikshit, N., N. Sivaraj and A.B. Das, 2014. Genotypic variations in agro-morphological and physico-chemical traits in ethnic aromatic rice (Oryza sativa) landraces of Odisha. Indian J. Agric. Sci., 84: 987-992.
  37. Dikshit, N., M.A. Nizar and N. Sivaraj, 2014. Phenotypic variability in grass pea (Lathyrus sativus L.) germplasm of Vidarbha region of Maharashtra, India. Legume Res. Int. J., 37: 556-558.
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  38. Dikshit, N., G. Katna, C.S. Mohanty, A.B. Das and N. Sivaraj, 2014. Horse Gram. In: Broadening the Genetic Base of Grain Legumes, Singh, M., I.S. Bisht and M. Dutta (Eds.). Springer, India, pp: 209-215.
  39. Abraham, B., K.S. Varaprasad, M. Vanaja, N. Sunil, N. Sivaraj, V. Kamala and S.K. Chakrabarty, 2014. BAR-062 (IC426765; INGR13057), a Blackgram (Vigna mungo) Germplasm as a Photosensitive Line (Flowers only in Post Rainy/Rabi season). Indian J. Plant Genet. Resour., 27: 70-71.
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  40. Spandana, B., R.B.N. Prasad, C. Sarika, G. Anuradha, N. Sivaraj and S. Sivaramakrishnan, 2013. Variation in seed oil content and fatty acid composition in sesame (Sesamum indicum). Indian J. Agric. Sci., 83: 1402-1405.
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  41. Sivaraj, N., S.K. Chakrabarty, K.V. Kumar and S.K. Soam, 2013. GIS Applications for Plant Genetic Resources Management with Special Reference to Germplasm Conservation. In: Geospatial Technologies for Natural Resources Management, Soam, S.K., P.D. Sreekanth and N.H. Rao (Eds.). New India Publsihing Agency, New Delhi, India, pp: 321-333.
  42. Radhamani, J. and N. Sivaraj, 2013. Conservation Strategies and Management of Jatropha Germplasm. In: Jatropha Challenges for a New Energy Crop, Bahadur, B., M. Sujatha and N. Carels (Eds.). Springer, New York, pp: 479-500.
  43. Pandravada, S.R., N. Sivaraj, N. Sunil, R. Jairam and Y. Prashanthi et al., 2013. Sorghum landraces patronized by tribal communities in Adilabad district, Andhra Pradesh. Indian J. Traditional Knowledge, 12: 465-471.
  44. Lokesh, B., P. Suryanarayana, R.V.S. Reddy, K. Reddy and N. Sivaraj, 2013. Variability, heritability and genetic advance studies in Brinjal (Solanum melongnea L). Electron. J. Plant Breed., 4: 1097-1100.
  45. Lokesh, B., P. Suryanarayana, R.V.S. Reddy, K. Reddy and N. Sivaraj, 2013. Correlation and path coefficient studies in Brinjal (Solanum melongnea L). Green Farming, 4: 1-5.
  46. Kumar, G., N. Sivaraj, V. Kamala, K.K. Gangopadhyay and S. Pandey et al., 2013. Diversity analysis in eggplant Germplasm in India using DIVA-GIS approach. Indian J. Horticult., 70: 519-525.
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  47. Kiranmayi, S.L., V. Roja, K. Padmalatha, N. Sivaraj and S. Sivaramakrishnan, 2013. Assessment of genetic diversity in sesame (Sesamum indicum L.) using morphological and molecular approaches. Trends Biosci., 6: 710-718.
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  48. Dikshit, N. and N. Sivaraj, 2013. Diversity for protein and morpho-agronomical characteristics in proso millet germplasm collections of ratnagiri district, maharashtra, India. Vegetos, 26: 164-170.
  49. Abraham, B., M. Vanaja, P.R.R. Reddy, N. Sivaraj, N. Sunil, V. Kamala and K.S. Varaprasad, 2013. Identification of stable and high yielding genotypes in blackgram (Vigna mungo (L.) Hepper) germplasm. Indian J. Genet. Plant Breed., 73: 264-269.
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  50. Abraham, B., K.S. Varaprasad, M. Vanaja, N. Sunil, V. Kamala, N. Sivaraj and P.R. Reddy, 2013. Identification of photosensitive lines in black gram and their characterization. Indian J. Plant Genet. Resour., 26: 47-49.
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  51. Sunil, N., V. Kumar, N. Sivaraj, B. Abraham, N.S. Panwar and K.S. Varaprasad, 2012. Identification of areas of diversity and distribution of Pongamia based on altitude and seed traits. Indian J. Agric. Sci., 82: 489-493.
  52. Sunil, N., K.S. Varaprasad, N. Sivaraj, B. Abraham and V. Kumar, 2012. Identification and characterization of green gram [Vigna radiata (L.) R. Wilczek.] photosensitive lines and their significance. Legume Res., 35: 78-80.
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  53. Sujatha, M., S. Vijay, S. Vasavi, N. Sivaraj and S.C. Rao, 2012. Combination of thidiazuron and 2-isopentenyladenine promotes highly efficient adventitious shoot regeneration from cotyledons of mature sunflower (Helianthus annuus L.) seeds. Plant Cell Tissue Organ Cult., 111: 359-372.
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  54. Spandana, B., N. Sivaraj, G.J.P. Rao, G. Anuradha, S. Sivaramakrishnan and F. Jabeen, 2012. Diversity analysis of sesame germplasm using DIVA-GIS. J. Spices Aromatic Crops, 21: 145-150.
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  55. Sivaraj, N., S.R. Pandravada, R. Jairam, N. Sunil and K.S. Varaprasad et al., 2012. An indigenous cost effective innovation for bird scares by the Gond tribe in Adilabad district, Andhra Pradesh. Indian J. Traditional Knowledge, 11: 714-718.
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  56. Sivaraj, N., S.R. Pandravada, N. Dikshit, M.A. Nizar and V. Kamala et al., 2012. Geographical Information System (GIS) approach for sustainable management of safflower (Carthamus tinctorius L.) genetic resources in India. J. Oilseeds Res., 29: 45-49.
  57. Sivaraj, N., N. Sunil, S.R. Pandravada, V. Kamala and V. Kumar et al., 2012. Variability in linseed (Linum usitatissimum) germplasm collections from peninsular India with special reference to seed traits and fatty acid composition. Indian J. Agric. Sci., 82: 102-105.
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  58. Pandravada, S.R., N. Sivaraj, N. Sunil, V. Kamala and N. Dikshit et al., 2012. Safflower (Carthamus tinctorius L.) genetic resources of India: Status of collection, evaluation, conservation and utilization from peninsular region. J. Oilseeds Res., 29: 80-84.
  59. Pandravada, S.R., B.S. Babu, K. Anitha, S.K. Chakrabarty and N. Sivaraj et al., 2012. BSBS-151 (IC0383192; INGR11031), a Dolichos bean (Lablab purpureus) germplasm, with resistance to aphids (Aphis craccivora) and Anthracnose (Colletotrichum lindemuthianum). Indian J. Plant Genet. Resour., 25: 217-218.
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  60. Elangovan, M., P.K. Babu, V.A. Tonapi, L.V. Subbarao and N. Sivaraj, 2012. Cultivated grasses their wild relatives of Andhra Pradesh and its conservation concerns. Indian J. Plant Genet. Resour., 25: 166-173.
  61. Dikshit, N., M.A. Nizar and N. Sivaraj, 2012. Evaluation and diversity analysis of safflower germplasm in relation to morpho-agronomic characteristics. J. Oilseeds Res., 29: 17-23.
  62. Spandana, B., G. Anuradha, N. Sivaraj and S. Sivaramakrishnan, 2011. Determination of genetic variation in Indian Sesame (Sesamum indicum) genotypes for agro-morphological traits. J. Res. Agric. Sci., 7: 88-99.
  63. Sivaraj, N., S.R. Pandravada, V. Kamala, N. Sunil and K.S. Varaprasad, 2011. NS/2009/042 (IC0571819; INGR10064), bottle gourd (Lagenaria siceraria L.) germplasm, a rare and unique bottlegourd accession with spindle shaped fruits with hard durable rind. Plant germplasm registration notice. Indian J. Plant Genet. Resour., 24: 128-129.
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  64. Kamala, V., A.J. Gupta, N. Sivaraj, S.R. Pandravada, N. Sunil, K.S. Varaprasad and K.E. Lawande, 2011. Diversity analysis of onion germplasm collections from north Telangana region of Andhra Pradesh. Indian J. Plant Genet. Resour., 24: 163-171.
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  65. Varaprasad, K.S., S.K. Sharma, N. Sivaraj and A. Sarker, 2010. Integrated gene resource management of underutilized legumes in India. Euphytica, 180: 49-56.
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  66. Varaprasad, K.S. and N. Sivaraj, 2010. Plant genetic resources conservation and use in light of recent policy developments. Electron. J. Plant Breed., 1: 1276-1293.
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  67. Sunil, N., N. Sivaraj, S.R. Pandravada, V. Kamala, B. Abraham, V. Kumar and K.S. Varaprasad, 2010. Trait specific analysis of castor (Ricinus communis L.) germplasm for dlineation of areas of diversity in Andhra Pradesh using DIVA-GIS. J. Oilseeds Res., 27: 154-159.
  68. Sivaraj, N., S.R. Pandravada, V. Kamala, N. Sunil, K.S.N. Murthy and K.S. Varaprasad, 2010. Ethnic uses of castor (Ricinus communis L.) in Eastern ghats, India. J. Oilseeds Res., 27: 318-323.
  69. Sivaraj, N., N. Sunil, S.R. Pandravada, V. Kamala and B.V.S.K. Rao et al., 2010. Fatty acid composition in seeds of jack-bean [Canavalia ensiformis (L.) DC.] and sword-bean [Canavalia gladiata Jacq.) DC.] germplasm from south India: A DIVA-GIS analysis. Seed Technol., 32: 46-53.
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  70. Gangopadhyay, K.K., R.K. Mahajan, Kumar, Gunjeet and S.K. Yadav et al., 2010. Development of a core set in brinjal (Solanum melongena L.). Crop Sci., 50: 755-762.
  71. Anitha, K., N. Sunil, N. Sivaraj, S.K. Chakrabarty and B. Abraham et al., 2010. Spatial distribution of seedborne fungi on Pongamia pinnata: A DIVA-GIS analysis with reference to Macrophomina phaseolina. Indian J. Plant Prot., 38: 67-72.
  72. Abraham, B., V. Kamala, N. Sivaraj, N. Sunil, S.R. Pandravada, M. Vanaja and K.S. Varaprasad, 2010. DIVA-GIS approaches for diversity assessment of pod characteristics in black gram (Vigna mungo L. Hepper). Curr. Sci., 98: 616-619.
  73. Sunil, N., V. Kumar, N. Sivaraj, C. Lavanya, R.B.N. Prasad, B.V.S.K. Rao and K.S. Varaprasad, 2009. Variability and divergence in Pongamia pinnata (L.) Pierre germplasm-a candidate tree for biodiesel. GCB Bioenergy, 1: 382-391.
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  74. Sunil, N., N. Sivaraj, K. Anitha, B. Abraham and V. Kumar et al., 2009. Analysis of diversity and distribution of Jatropha curcas L. germplasm using Geographic Information System (DIVA-GIS). Genet. Resour. Crop Evol., 56: 115-119.
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  75. Sivaraj, N., N. Sunil, S.R. Pandravada, V. Kamala and V. Kumar et al., 2009. DIVA-GIS approaches for diversity assessment of fatty acid composition in linseed (Linum usitatissimum L.) germplasm collections from peninsular India. J. Oilseeds Res., 26: 13-15.
  76. Sivaraj, N., K.S. Varaprasad, S.R. Pandravada and S.K. Sharma, 2009. Agrobiodiversity Hotspots in Eastern Ghats - Issues and Challenges. In: Agrobiodiversity Hotspots: Access and Benefit Sharing, Kannaiyan, S. (Ed.). Narosa Publishing Company, New Delhi, India, Pages: 325.
  77. Seetharama, N., M. Elangovan, I.S. Khairwal, K.T. Gowda and A. Seetharam et al., 2009. Sorghum and Millet Genetic Resources Management. In: Agrobiodiversity Hotspots: Access and Benefit Sharing, Kannaiyan, S. (Ed.). Narosa Publishing Company, New Delhi, India.
  78. Nirmala, R., N. Sunil and N. Sivaraj, 2009. Molecular Approaches for Plant Genetic Resource Management. In: Diversity of Plants-A Molecular Approach, The Rapinat Herbarium and Centre for Molecular Systematics, St. Joseph's College, Tiruchirapalli, pp: 89-102.
  79. Sunil, N., N. Sivaraj, S.R. Pandravada, V. Kamala, P.R. Reddy and K.S. Varaprasad, 2008. Genetic and geographical divergence in horse gram germplasm from Andhra Pradesh, India. Plant Genet. Resour., 7: 84-87.
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  80. Sunil, N., K.S. Varaprasad, N. Sivaraj, T.S. Kumar, B. Abraham and R.B.N. Prasad, 2008. Assessing Jatropha curcas L. germplasm in-situ: A case study. Biomass Bioenergy, 32: 198-202.
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  81. Sunil, N., G.S. Reddy, N. Sivaraj and S. Sridhar, 2008. Collection and conservation of tamarind (Tamarindus indica L.)-a multipurpose tree for livelihood of rural poor. J. Econ. Taxon. Bot., 32: 24-29.
  82. Sivaraj, N., S.R. Pandravada, V. Kamala, N. Sunil and B. Abraham, 2008. Efficacy of extraction methods on seed storage in eggplant (Solanum melongena L.). Seed Sci. Technol., 36: 99-104.
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  83. Sivaraj, N., N. Sunil, V. Kumar and K.V. Krishnamurthy, 2008. Phenology and Reproductive Ecology of Tree Taxa in the Scrub Vegetation of Eastern Ghats, India. In: Bioresources Conservation and Management, Raju, A.J.S. (Ed.). Today & Tomorrow's Printers and Publishers, New Delhi, India pp: 5-21.
  84. Varaprasad, K.S., N. Sivaraj, M. Ismail and S.K. Pareek, 2007. GIS Mapping of Selected Medicinal Plants Diversity in the Southeast Coastal Zone for Effective Collection and Conservation. In: Advances in Medicinal Plants, Reddy, K.J., B. Bahadur, B. Bhadraiah and M.L.N. Rao (Eds.). Universities Press, Hyderabad, India, pp: 69-78.
  85. Sivaraj, N., N. Sunil, V. Kamala and S.R. Pandravada, 2007. Weed flora in the groundnut field-an ecological study. J. Econ. Taxon. Bot., 31: 901-906.
  86. Sivaraj, N., S.R. Pandravada, K.S. Varaprasad, B.S. Babu and N. Sunil et al., 2006. Medicinal plant wealth of eastern ghats with special reference to indigenous knowledge systems. J. Swamy Botanical Club, 23: 165-172.
  87. Pandravada, S.R., N. Sivaraj, B.S. Babu, K.S. Varaprasad and M. Ismail, 2006. Biodiversity of Medicinal Plants-Exploration, Collection and Conservation from South East Coastal India. In: Advances in Medicinal Plants, Reddy, K.J., B. Bahadur, B. Badraiah and M.L.N. Rao (Eds.). Universities Press, Hyderabad, India, pp: 79-91.
  88. Pandravada, S.R., B. Joseph, N. Sivaraj, K.S. Varaprasad and V. Kamala, 2006. Diversity in germplasm of Pongamia pinnata (L.) Pierre and its traditional uses in southern parts of Andhra Pradesh. Indian J. Agroforestry, 8: 57-61.
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  89. Sivaraj, N. and S.R. Pandravada, 2005. Morphological diversity for fruit characters in bottle gourd germplasm from tribal pockets of Telangana Region of Andhra Pradesh, India. Asian Agric. History, 9: 305-310.
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  90. Babu, S.B., K. Anitha, S.R. Pandravada, S.K. Chakrabarty, N. Sivaraj, N. Sunil and R.D.V.J.P. Rao, 2005. Reaction of Lablab purpureus germplasm from peninsular India to Colletotrichum lindemuthianum and Aphis craccivora. J. Mycol. Plant Pathol., 34: 888-890.
  91. Anitha, K., S.K. Chakrabarty, N. Sunil, N. Sivaraj and R.D.V.J.P. Rao, 2005. Evaluation of sunflower germplasm against Alternaria blight and rust diseases. J. Mycol. Plant Pathol., 35: 262-264.
  92. Pandravada, S.R., N. Sivaraj and Varaprasad, 2004. The Changing Pattern of Plant Biodiversity in the Eastern Ghats. In: Plant Genetic Resource Management, Dhillon, B.S., R.K. Tyagi, A. Lal and S. Saxena (Eds.). Narosa Publishing House, New Delhi, India, pp: 136-152.
  93. Sunil, N., N. Sivaraj and S.K. Chakrabarty, 2003. Characterization and evaluation of mung bean (Vigna radiata L. Wilczek) germplasm from Andhra Pradesh, India. Indian J. Plant Genet. Resour., 16: 18-20.
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  94. Sivaraj, N., S.R. Pandravada, N. Shrivastava and J. Haldar, 2001. Genetic diversity in Niger from peninsular India. J. Oilseeds Res., 18: 102-104.
  95. Sujatha, M., N. Sivaraj and M.S. Prasad, 2000. Biochemical and histological changes during in vitro organogenesis in jatropha integerrima. Biol. Plant., 43: 167-171.
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  96. Sivaraj, N., S.R. Pandravada, C.P. Rao and N. Reddy, 2000. Collecting rice germplasm from parts of Telangana region of Andhra Pradesh, India. Indian J. Plant Genet. Resour., 13: 191-193.
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  97. Pandravada, S.R., B.S. Babu, N. Sivaraj, G.M. Rao and Y.V.V. Satyanarayana, 2000. Species diversity and germplasm collection of medicinal plants from Eastern Ghats. Indian For., 126: 1191-1203.
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  98. Babu, B.S., S.R. Pandravada, N. Sivaraj and K. Venkateswaran, 2000. An introduced oil yielding plant from E1 Salvador, Simarouba glauca DC., a new host record for bark eating caterpillar Indarbela quadrinotata (Walker). Indian J. Plant Prot., 28: 111-112.
  99. Sivaraj, N., S.R. Pandravada and B. Abraham, 1999. Evaluation and characterization of eggplant (Solanum melongena L.) germplasm. J. Swamy Botanical Club, 16: 49-50.
  100. Sivaraj, N., T.R. Srinivas, S.R. Pandravada and V. Kamala, 1998. Field evaluation of eggplant germplasm. Indian J. Plant Genet. Resour., 11: 103-105.
  101. Babu, S.B., K.S. Varaprasad, S.K. Chakrabarty and N. Sivaraj, 1998. Status of resistant germplasm in eggplant and wild Solanum species. Indian J. Plant Genet. Resour., 11: 49-61.
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  102. Sivaraj, N. and S.R. Pandravada, 1997. Phalsa (Grewia asiatica L.) germplasm collection from Andhra Pradesh. Indian J. Plant Genet. Resour., 10: 223-225.
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  103. Babu, B.S., S.R. Pandravada, V. Kamala and N. Sivaraj, 1997. Reaction of some South Indian Solanum germplasm collection to shoot and fruit borer, Leucinodes orbonalis Guen. J. Entomol. Res., 21: 35-38.
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  104. Sivaraj, N. and S.R. Pandravada, 1996. Variability in the landraces of rice collected from Adilabad district of Andhra Pradesh. J. Swamy Botanical Club, 13: 13-18.
  105. Pandravada, S.R., N. Sivaraj and K.R.K. Murthy, 1996. Collection of rice germplasm from Adilabad district, Andhra Pradesh, India. Indian J. Plant Genet. Resour., 9: 255-260.
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  106. Sivaraj, N. and K.V. Krishnamurthy, 1992. Fruiting behaviour of herbaceous and woody flora of Shervaroy Hills in eastern Ghats, India. Trop. Ecol., 33: 191-199.
  107. Sivaraj, N. and K.V. Krishnamurthy, 1989. Flowering phenology in the vegetation of shervaroys, South India. Vegetatio, 79: 85-88.
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  108. Balasubramanian, V. and N. Sivaraj, 1986. Embryology of Alstonia venenata R. Br. J. Swamy Botanical. Club, 3: 169-171.