국내 육성 조생종 벼 품종들에 대한 등숙기 고온내성 평가

Seong-Woo Cho; Ji-Ung Jeung; Kyung-Ho Kang; Hyun-Soon Kim; Bo-Kyeong Kim

doi:10.7740/kjcs.2015.60.2.146

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Original Research Article

국내 육성 조생종 벼 품종들에 대한 등숙기 고온내성 평가 Evaluation on Early-maturing Korean Japonica Cultivars for High-temperature Tolerance during Grain Filling Stage

30 June 2015. pp. 146-152

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Abstract

Early-maturing Korean Japonica cultivars and Jungmo1024 were used as plant materials to evaluate hightemperature tolerance during grain filling stage. National Institute of Crop Science (NICS) in Korea developed Jungmo1024, a mutant line from Namil (wild type) treated by using sodium azide (SA) as mutagen. To evaluate high-temperature tolerance, all cultivars were exposed to high-temperature (day 31.5±2.5°C/ night 27.5±1.3°C) and ordinary temperature (day 27.5±1.8°C/ night 24.7±1.6°C) during grain filling stage. In these conditions, we performed compared evaluation of grain shape such as length and width and grain quality by using a 1625 Cervitec grain inspector. High-temperature during grain filling stage caused decrease of grain shape. In grain shape such as length and width, the decrease rate of width (average 6.3%) was higher than the decrease rate of length (average 1.3%). Hence, high-temperature affected width of grain than length of grain. In addition, high-temperature showed a decided difference in rate of head rice between ordinary temperature (average 76.3%) and high-temperature (average 13.3%).As a result, Taebong, Ungwang, Manan, and Jungmo1024 seemed relatively a decent high-temperature tolerance than other cultivars. Especially, Jungmo1024 seemed remarkable rate of head rice (average 34.4±6.2%) than other cultivars under high-temperature. It is considered that a genetic trait of Jungmo1024 can be useful to improve breeding for high-temperature tolerance.

Keywords

high-temperature tolerance

early-maturing

mutant

sodium azide

rice

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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 : 60
No :2
Pages :146-152
Received Date : 2014-11-10
Revised Date : 2015-01-05
Accepted Date : 2015-04-26
DOI :https://doi.org/10.7740/kjcs.2015.60.2.146

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

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