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2019 Vol.64, Issue 4

Original Research Article

Effect of Oxygen and Temperature Levels on the Seedling Characteristics of Korean and Anaerobic Germination-tolerant Rice under Flooding Conditions

담수 직파에서 산소 및 온도조건에 따른 혐기발아 내성 자원과 국내 직파 적응성 벼 품종의 입모특성 비교

Jong-Min Jeong1*
,
Jinhee Kim2
,
Youngjun Mo1
,
Su-Kyung Ha1
,
Woo-Jae Kim1
,
Bo-Kyeong Kim3
,
Ji-Ung Jeung3
정 종민1*
,
김 진희2
,
모 영준1
,
하 수경1
,
김 우재1
,
김 보경3
,
정 지웅3
1Junior Research Scientist, Crop Breeding Division, National Institute of Crop Science, Rural Development Administration
2Postdoctoral Researcher, Crop Breeding Division, National Institute of Crop Science, Rural Development Administration
3Senior Research Scientist, Crop Breeding Division, National Institute of Crop Science, Rural Development Administration
1농촌진흥청 국립식량과학원 작물육종과 농업연구사
2농촌진흥청 국립식량과학원 작물육종과 전문연구원
3농촌진흥청 국립식량과학원 작물육종과 농업연구관
* Corresponding Author
31 December 2019. pp. 287-298
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Abstract

The aim of the present study was to compare the germination and seedling characteristics of rice varieties grown under various flooding conditions and different temperature and oxygen levels and to identify germplasm suitable for wet direct seeding. Three anaerobic germination tolerant (AGT) genotypes (PBR, WD3, KHO) and eleven Korean rice varieties (KVs) adapted for direct seeding were evaluated for seedling performance under different temperatures (15, 18, 21, and 24°C) and oxygen levels (Low, Normal, High). Compared with the KVs, the AGT genotypes (especially KHO and PBR) exhibited relatively high germination and survival rates and coleoptile and radical growth rates under low temperature and low oxygen conditions, thereby indicating their suitability for wet direct seeding. Among the KVs, ‘Dongan,’ ‘Jungan,’ and ‘Cheongdam’ rice exhibited the highest survival rates under low temperature and low oxygen conditions. Three-way ANOVA indicated that temperature had the greater effects on seedling characteristics (43.2-78.0%) than either oxygen level (15.4-37.5%) or genotype (2.0-29.8%) did. Therefore, in direct seeding cultivation, temperature was the most important environmental factor for seedling establishment.

Keywords
anaerobic germination
oxygen
rice
temperature
wet direct seeding
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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 : 64
  • No :4
  • Pages :287-298
  • Received Date : 2019-10-03
  • Revised Date : 2019-10-29
  • Accepted Date : 2019-10-31
  • DOI :https://doi.org/10.7740/kjcs.2019.64.4.287
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