Survey of overwintering trait in Chinese rice cultivars (Oryza sativa L)

Autor: Yongshu Liang, Junyi Gong, Yuxin Yan, Baobi Wang, Wenao Gong, Huan Wen, Qian Wu, Wenbin Nan, Xiaojian Qin, Hanma Zhang
Rok vydání: 2022
Předmět:
Zdroj: Euphytica. 218
ISSN: 1573-5060
0014-2336
DOI: 10.1007/s10681-022-03044-6
Popis: Overwintering (OW) rice can survive through the natural cold-winter field environment, exhibit a strong root system activity, sprout from rice tillering node in the following spring, and apparently reveal the cold resistance of rice during the whole growth stage. The successful utilization of cold-resistant rice is the most economical strategy for the cold-resistant rice cultivar breeding. This work aims to identify the OW rice for the future development of cold-resistant cultivars. Altogether 1034 Chinese rice cultivars were evaluated for their responses to low temperatures under the natural field cold-winter environment. The heading date (HD, d) and plant height (PH, cm) of 1034 rice cultivars ranged from 65 to 140 d in 2019, 65 to 150 d in 2020, ranged from 60 to 140 cm in 2019, 60 to 150 cm in 2020, and displayed slight difference between 2019 and 2020. Among them, altogether 262 (25.34%) Japonica rice cultivars could withstand cold to 4°C in December 2019 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%) japonica rice cultivars with resistance to 0°C in January 2021 distributed in seven provinces of China could also sprout from rice tillering node in March 2021. The present cold-resistant rice cultivars will provide beneficial breeding germplasm for future cold-resistant rice breeding and new strategies in elucidating the molecular mechanism of the cold resistance of rice.
Databáze: OpenAIRE
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