CO(R) 48 (IET 19037): A New High Yielding Medium Duration Fine Grain Rice Variety
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Author: S. Rajeswari, S. Robin, K. Mohana Sundaram, K. Thiyagarajan, S. Manonmani, N. Kumaravadivel, R. Rabindran, S. Suresh, Subbalakshmi Loganadhanand T.S. Raveendran,
p-ISSN: 0024-9602, e-ISSN:2582-5321, Vol: 99, Issue: oct-dec,
DOI:https://doi.org/10.29321/MAJ.10.100169
Abstract
CO(R) 48, a medium duration rice variety was developed to meet the fine rice requirement of
Tamil Nadu. It is a derivative of the cross between CO 43 and ASD 19. It has medium tall plant
stature with high biomass and grain yield. It matures in duration of 130-135 days. CO (R) 48
recorded a mean grain yield of 6007 Kg/ha in 93 trials which was 9.8 and 16.6 per cent higher
than Improved White Ponni and BPT 5204 respectively. It is moderately resistant to stem
borer, BPH, WBPH, GLH, blast, RTD and sheath blight. It produces medium slender white rice
with high milling percentage(71.9%), good head rice recovery (70.9%), intermediate amylose
content (24.9%), soft gel consistency, good linear elongation ratio (1.43) and moderate
gelatinization temperature (73.14°C), the characters accounting for market preference and
superior cooking quality. In view of its superior performance with higher yield, better pests
and diseases resistance and superior cooking quality, the variety CO(R) 48 was released for
cultivation in the irrigated ecosystems of Tamil Nadu during thaladi season.
Keywords: CO(R) 48, medium duration, fine grain rice variety
