Assessment of Seed Dormancy in Different Rice Varieties

Author: Chiranjeevi C. Kulkarni*, D. Lenka, K. C. Muduli, D.N. Bastia, S. Mohanty, R.K. Panda, S.K. Swain and S.P. Monalisa

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Abstract

ABSTRACT: An investigation has been planned to study the dormancy duration in different rice varieties. About 54 rice varieties of different groups (early, medium and late maturing) released from Odisha University of Agriculture and Technology (OUAT) and National Rice Research Institute (NRRI), Cuttack were studied for duration of seed dormancy. The fresh seeds of 54 rice varieties harvested during kharif 2017 exhibited variation in dormancy duration ranging from 4-79 days. Based on dormancy duration, the 54 rice varieties were classified into five categories viz., very weak (0-7 days), weak (7-14 days), moderate (14-21 days), strong (21-28 days) and very strong (> 28 days). The least dormancy duration of 4.00 days was recorded in variety Khandagiri and the varieties CR Dhan 506 and CR Dhan 508 showed highest dormancy duration of 79.00 days. The study focuses on the existence of wide range of dormancy in 54 rice varieties for using them as donors in the future rice improvement programm

Keywords

Keywords: Duration of dormancy, Germination, Rice, Seed dormancy, Varieties