EFFECT OF VARYING TRANSPLANTING TIMES ON GRAIN QUALITY CHARACTERISTICS OF RICE (Oryza sativa L.) GENOTYPES

KANU PRIYA SHARMA¹*, NEERJA SHARMA^2
1Department of Biochemistry, Punjab Agricultural University, Ludhiana, 141004, Punjab, India
²Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana, 141004, Punjab, India
* Corresponding Author : sharmakanu426@gmail.com

Received : 13-09-2017     Accepted : 16-09-2017     Published : 18-09-2017
Volume : 9     Issue : 43       Pages : 4693 - 4696
Int J Agr Sci 9.43 (2017):4693-4696

Keywords : Rice, Oryza sativa, transplanting time, grain quality, head rice recovery, chalkiness
Academic Editor : Jyotirmoy Ghosh, Dr Madhu Patial
Conflict of Interest : None declared
Acknowledgements/Funding : We are thankful to Punjab Agricultural University, Ludhiana for providing lab and field facilities to conduct the experiment. We also thanks to Dr Gurjit Singh Mangat (Sr.Rice Breeder) and Dr Rupinder Kaur (Rice Breeder) for providing seeds and their help in designing and conduct of field experiment
Author Contribution : Sharma Kanu Priya carried out the experimental work and wrote the manuscript. Sharma Neerja designed, provided scientific support, and co-wrote the manuscript

To investigate the effect of varying transplanting dates on rice grain quality characteristics and to compare the protein profile of flag leaf at different dates of transplanting in rice (Oryza sativa L.) genotypes viz., heat tolerant (N22), moderately heat susceptible (IR8) and fine grain rice variety (PR116), were transplanted at three different times i.e., D1 (very early), D2 (early) and D3 (normal date of transplanting). No predictable difference was observed in the electrophoretic pattern of protein bands in all the three cultivars. The 1000-grain weight of paddy, brown rice and milled rice decreased at D1 and D2, particularly in IR8. Grain dimensions were unaffected by different transplanting dates. The head rice recovery was decreased significantly at D1 (53.83- 65.96 %) and D2 in all the three cultivars with the maximum head rice recovery (60.24- 68.60%) being obtained at normal transplanting time. Early transplanting caused significant increase in the percentage of chalky grains (%) in the susceptible genotype IR8 compared N22 and PR 116. Higher temperature during very early and early transplanting times had great impact on chalkiness. The heat susceptible cultivar were observed to be prone to heat stress encountered during very early and early DOT as maximum chalkiness was recorded in IR8 during D1 (12.80 %) followed by D2 (9.60 %) and D1 (6.75 %) respectively.

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