EFFECTIVE METHODS FOR DORMANCY BREAKING OF 15 NEW-IMPROVED RICE VARIETIES TO ENHANCE THE VALIDITY OF GERMINATION TEST

Yuningsih, Aida F. V. and Sri , Wahyuni (2016) EFFECTIVE METHODS FOR DORMANCY BREAKING OF 15 NEW-IMPROVED RICE VARIETIES TO ENHANCE THE VALIDITY OF GERMINATION TEST. In: Proceeding ISEPROLOCAL. Badan Penerbitan Fakultas Pertanian Universitas Bengkulu, Bengkulu, Indonesia, pp. 166-173. ISBN 9786029071184

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Abstract

Dormancy is acharacteristic of seeds, which is genetically inherited and is an important factor in the germination of seeds. Dormancy in rice serves as a mechanism of survival by protecting the seed from germinating in the mother-plants, however it becomes a problem in germination evaluation as part of seed quality testing when methods for overcoming dormancy is not effective.Seven different treatments were used to determine seed dormancy of 15 new improved-varieties. Results showed all varieties tested have a diversity of dormancies. A total of 15 varieties showed intensity of dormancy varied between 47-98%.Persistency of dormancy of the 15 varieties ranged between 2-8 weeks. At the beginning of seed storage (0 week), the results showed that 14 out of 15 varieties treated by drying at temperature of 50oC for 48 h and continued by soaking the seeds in 10 ppm GA3 solution for 24 h gave means value of seed germination ≥85%, whereas the control seeds of 15 tested varieties showed means value of germination below 60%. This method of breaking seed dormancy is considered to be effective and available to be used by seed analysts on rice seed germination testing specifically for those 14 varieties tested.

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