Pre-Harvest Sprouting Variation of Rice Seeds Located on Each Panicle Position According to Grain Filling Days

Jung-Sun Baek; Nam-Jin Chung

doi:10.7740/kjcs.2014.59.1.022

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Original Research Article

Pre-Harvest Sprouting Variation of Rice Seeds Located on Each Panicle Position According to Grain Filling Days 벼 등숙일수에 따른 이삭 착생 부위별 종자의 수발아 변이

31 March 2014. pp. 22-26

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Abstract

This research was implemented to investigate pre-harvest sprouting characteristics in two Korean rice cultivars, Shindongjin (SDJ) and Hopum (HP). The panicles of both varieties were sampled after 15 days after heading (DAH) to 60 DAH at intervals of 5 days. As soon as sampled, the panicles were imbibed in water for 14 days at 25°C to determine the vigor and germination ability of seeds according to location on panicle. To investigate the cause of non-germination of seeds in panicles, tetrazolium test and dormancy breaking were performed. The preharvest sprouting of HP started at 20 DAH while that of SDJ began at 30 DAH. The germination of seeds located in high rank branches within a panicle and the terminal seeds within a branch were earlier and faster and the germination patterns were same in both cultivars. The times at more than 50% of germination in a panicle were 35 DAH (57.0%) in HP and 45 DAH (56.8%) in SDJ. Preharvest sprouting was more than 80% at 50 DAH (82.6% of HP, 92.3% of SDJ) and more than 99% at 60 DAH (99.5%, 99.4%, HP and SDJ). These results indicated that the rate of PHS in a panicle increased with accumulation of the days after heading. The cause of non-germinated seeds at 15-25 DAH in panicle was immature embryo. After 30 DAH, however, when the non-germinated seeds were hulled, they started to germinate due to dormancy breaking, in which the germination percentage was higher in SDJ than HP. In conclusion, the pre-harvest sprouting varied according to days after heading, the seed position on panicle, and the dormancy intensity of varieties.

Keywords

rice

seed

pre-harvest sprouting

dormancy

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Information

Publisher :The Korean Society of Crop Science
Publisher(Ko) :한국작물학회
Journal Title :The Korean Journal of Crop Science
Journal Title(Ko) :한국작물학회지
Volume : 59
No :1
Pages :22-26
Received Date : 2013-04-30
Revised Date : 2013-09-30
Accepted Date : 2014-02-06
DOI :https://doi.org/10.7740/kjcs.2014.59.1.022

The Korean Journal of Crop Science ISSN:0252-9777(Print) 2287-8432(Online) 한국작물학회지

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