文献类型: 外文期刊
作者: Liang, Yongshu;Gong, Junyi;Yan, Yuxin;Wang, Baobi;Gong, Wenao;Wen, Huan;Wu, Qian;Nan, Wenbin;Qin, Xiaojian;Zhang, Hanma
作者机构:
关键词: Oryza sativa L.;Overwintering rice cultivar;Cold tolerance to 4 degrees C;Cold tolerance to 0 degrees C
期刊名称: EUPHYTICA
ISSN: 0014-2336
年卷期: 2022 年 218 卷 7 期
页码:
收录情况: SCIE(2022版)
摘要: Overwintering rice can survive through the natural cold-winter field environment, sprout from rice tillering node in the following spring, tiller, flower, seed, and being harvested in the following autumn, which is a type of an extreme case of cold tolerance of rice. The successful utilization of cold tolerance rice is the most economical strategy for the cold tolerance rice cultivar breeding project. This work aims to identify the OW rice for the future development of cold tolerance cultivars. Altogether 1034 Chinese existing rice cultivars including 735 (71.08%) conventional Japonica rice cultivars and 299 (28.92%) conventional Indica rice cultivars were collected and evaluated for their responses to low temperatures under the natural field cold-winter environment. Among them, altogether 262 (25.34%) conventional Japonica rice cultivars could withstand cold tolerance to 4 degrees C of the daily minimum temperatures in December 2019 throughout the coldwinter season and distributed in 13 provinces of China, survive through the natural cold-winter field environment, and sprout from rice tillering node in March 2020. Only 24 (2.32%) conventional japonica rice cultivars could withstand cold tolerance to 0 degrees C of the daily minimum temperatures in January 2021 throughout the cold-winter season, which could also sprout from rice tillering node in March 2021 and distributed in seven provinces of China. The present cold tolerance rice cultivars will provide beneficial breeding germplasm for the future cold tolerance rice breeding project and new strategies involved in elucidating the molecular mechanism of the cold tolerance of rice.
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