Evaluation on Early-maturing Korean Japonica Cultivars for High-temperature Tolerance during Grain Filling Stage
| Autor: | Ji-Ung Jeung, Hyun-Soon Kim, Seong-Woo Cho, Bo-Kyeong Kim, Kyung-Ho Kang |
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| Rok vydání: | 2015 |
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| Zdroj: | The Korean Journal of Crop Science. 60:146-152 |
| ISSN: | 2287-8432 0252-9777 |
| Popis: | 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 / night ) and ordinary temperature (day / night ) 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 ) 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. |
| Databáze: | OpenAIRE |
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