CO 52 (IET 25487): A highly remunerative medium duration fine grain rice variety

  • S. Robin, Professor,CPBG ,TNAU
  • R. Pushpam, Associate ProfessorDepartment of Plant Breeding and GeneticsAC&RI, Killikulam
  • S. Rajeswari, Professor,CPBG ,TNAU
  • K. Amudha, ASst.Prof,CPBG,TNAU
  • P. Jeyaprakash, Professor,CPBG ,TNAU
  • S. Manonmani, Professor,CPBG ,TNAU
  • M. Raveendran, Professor,CPBG ,TNAU
  • R. Rabindran, Professor,CPBG ,TNAU
  • A. Ramanathan, Professor,CPPS ,TNAU
  • S. Suresh, Professor,CPPS ,TNAU
  • R.P. Soundararajan, assoc.Prof(Ento),TNAU
  • S. Radhamani, Associate Prof,Agronomy, TNAU
  • V. Ravichandran and K. Ganesamurthy Associate Prof, Crop Physiology, TNAU


In Department of Rice, Tamil Nadu Agricultural University, Coimbatore, a medium duration fine grain rice variety CO52 was released for cultivation in transplanted situation for  late samba / thaladi season . CO52 rice variety recorded a mean grain yield of 6191 kg/ha and possessess quality grain traits comparable to the predominantly cultivated fine grain types. It is a derivative of the cross between BPT 5204 and CO(R) 50 which matures in 130-135 days. The variety was tested in the  station trial for three (2009-2011)years, Multi Location Trial for two (2011-12 and 2012-13) years, Adaptive Research Trial for two (2013-14 and 2014-15) years, OFT for three (2013-14, 2014-15 and 2015-16) years and in AICRIP trial for two (2011 and 2015) years. CO52 variety is moderately resistant to insect pests viz., plant hoppers and leaf hoppers and diseases viz., blast, sheath rot, brown spot and sheath blight. It produces medium slender white rice with high milling percentage, high head rice recovery, high linear elongation ratio, intermediate amylose content, soft gel consistency and moderate gelatinization temperature indicating its suitability for cooking with a remunerative market price and consumer preference similar to Improved White Ponni and BPT 5204.

How to Cite
S. Robin, R. Pushpam, S. Rajeswari, K. Amudha, P. Jeyaprakash, S. Manonmani, M. Raveendran, R. Rabindran, A. Ramanathan, S. Suresh, R.P. Soundararajan, S. Radhamani, V. Ravichandran and K. Ganesamurthy
CO 52 IET 25487: A highly remunerative medium duration fine grain rice variety. 2019. Electronic Journal of Plant Breeding, 10 3, 1148-1160. Retrieved from
Research Article