Author : Ngawang Chhogyell, Neelam Pradhan, Mahesh Ghimiray and Yadunath Bajgai

Abstract :

Ten elite short duration rice varieties were introduced from Bangladesh Rice Research Institute (BRRI), Bangladesh and evaluated at the Renewable Natural Resources Research and Development Centre – Bhur, in Sarpang in 2014. The varieties were tested both as the spring and main season crops to assess their potential for rice double cropping and crop intensification program of theDepartment of Agriculture. Rice varieties with short maturity duration are needed to adapt to the changing climate and altered growing conditions. The result from the spring crop showed that almost all the introduced varieties were not better than the local check (IR20913) in terms of earliness. Their days to flowering (DTF) ranged from 110 days (d) to 131 days except for one variety which had 103 days. IR 20913 flowered in 110 day and most of the varieties took about 2 weeks or longer to flower. However, the same varieties tested in the main season flowered between 81 d to 99 d which is comparable to the local check (Bhur Kambja 1) with 90 d. As the spring crop, these varieties were not better than the local checks in terms of their earliness. But the Bangladesh Rice Research Institute (BRRI) varieties like BRRI dhan26, 28, 56 and 58 were identified to be suitable for other agronomic traits such as crop stand, plant height and yield. These varieties produced grain yield of over 2 t/ha. Thus, four of the elite varieties have been selected and will be further evaluated prior to their release as climate resilient varieties.

Key Words :

Climate-smart varieties, days to flowering, short maturity duration, crop intensification program, Bhutan

Reference :

Bagchi, B.D., R. Bardhan, W.H. Jaim, and M. Hossain. 2012.Diversity, Spatial distribution and the process of adoption of improved rice varieties in West Bengal. Page 161-214 In Hussain, M., W.H. Jaim,T.R. Paris, and B.

Hardy, editors. Adoption and diffusion of modern rice varieties in Bangladesh and Eastern India. International Rice Research Institute, Los Banos. Philippines.

Baloch, M.S., Awa, I.U., Hassan, G. 2006.Growth and yield of rice as affected by planting dates and seedlings/hill under high temperature of Dera Ismail Khan.PakisthanJournal of Zhejiang University Science 7 (7): 572-579.

Chhogyel, C., L. Gyem and C. Dorji. 2013.Performance Evaluation of improved rice varieties at RDC Bajo.Journal of Renewable Natural Resources of Bhutan.Council for Renewable Natural Resources Research of Bhutan.Ministry of Agriculture and Forest, Thimphu Bhutan. 9 (2013) 25-30.

Department of Agriculture.2011. Field Manual for Rice production in low altitude zone. Renewable Natural Resources Research and Development Sub-Centre, Bhur, Gelephu. Department of Agriuclture, Ministry of Agriculture and Forests. Thimphu.40p

De Datta, S.K.1981. Principles and practices of Rice production.A Wiley-Interscience publications, United States of America. 640p

Food and Agriculture Organization. 2014. A regional rice strategy for sustainable food security in Asia and the Pacific. Final edition.Food and Agriculture Organization of the United NationsRegional Office for Asia and the Pacific. Bangkok, Thailand.38p.

Ghimiray, M., Dorji, K.D., Katwal, T.B., Penjore, U., Dorji, S., Pem S., G. Tenzin and K. Pradhan. 2008. Rice in Bhutan:A Resource book. Council for RNR Research of Bhutan (CoRRB, Ministry of Agriculture, Thimphu, Bhutan.271p.

Hargrove,T. and W.R. Coffman. 2006. Breeding History. Pages 34-38 in International Rice Research Institute. Rice Today October- December 2006. International Rice Research Institute, Los Banos, Philippines.

Hasan, E. 2014.Proposing mitigation strategies for reducing the impact of rice cultivation on climate change in Egypt.National Water Research Centre. Egypt. Science Direct. Water science 27: 69-77.

Intergovernmental Panel on Climate Change. 2007. Climate change 2007. Synthesis Report.An assessment of the intergovernmental Panel on Climate (accessed April 2015)

International Rice Research Institute. 1994. Breaking yield barrier: Rice Yield potential in favourable environments proceedings. International Rice Research Institute, Los Banos. Philippines. 135p.

International Rice Research Institute. 1974. Annual Report for 1973. International Rice Research Institute, Los Banos, Philippines.

International Rice Research Institute.1965.The morphology and varietal characteristics of the rice plants.Technical Bulletin 4. International Rice Research Institute, Los Banos, Philippines (4):40p.

Hazel, P.R. 2010. Asia’s Green Revolution: past achievements and future challenges. Page 61-92. In Pandey, S., D. Byerlee,D. Dawe, A.Dobermann,S.Mohanty,S. Rozelle and B. Hardy, editors.Rice in the Global Economy.Strategic Research and Policy Issues for Food security.International Rice Research Institute, LosBanos, Philippines.

Pandey, S., D. Byerlee, D. Dawe, A. Dobermann, S. Mohanty,S, Rozelleand B. Hardy. 2010. Rice in the Global Economy.Strategic Research and Policy Issues for Food security.International Rice Research Institute, LosBanos, Philippines.

Taiz, L., and E. Zeiger. 2002. Plant Physiology.3rd edition.Sinauer Associates, Inc. Publishers. Sunderland, MA. United States of America.

Wang, H., S.Pandy, O.Velarde, B.Hardy, editors, 2012. Pattern of varietal adoption and economics of rice production in Asia. International Rice Research Institute, Los 103

Banos. Philippines.

Wassmann, R., et al. 2009. Regional Vulnerability of Climate change Impacts on Asian Rice production and scope for adaption. Advances in Agronomy, International Rice Research Institute. Los Banos, Philippines 22: 91-133.

Yang, w., Peng, S., Rececca, S.l., R.M. VesperasandM.L. Dionsio-Sese. 2004. Grain yield and yield attributesof new plant type and hybrid rice. Crop breeding and genetics.International Rice Research Institute, Los Banos, Philippines.

Yoshida, S. 1981. Fundamentals of rice Crop Science. International Rice Research Institute, Los Banos. Philippines.p277.

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