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Chinese Agricultural Science Bulletin ›› 2025, Vol. 41 ›› Issue (11): 8-15.doi: 10.11924/j.issn.1000-6850.casb2024-0416

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Evaluation of Salt Tolerance During Germination and Seedling Stage of Guangdong Simiao Rice Varieties

LIANG Jiayan(), KONG Leilei, HU Xiaodan, YANG Xujian, YANG Wu, BAI Song()   

  1. Rice Research Institute, Guangdong Academy of Agricultural Sciences/Key Laboratory of Genetics and Breeding of High Quality Rice in Southern China (Co-construction by Ministry and Province), Ministry of Agriculture and Rural Affairs/ Guangdong Key Laboratory of New Technology in Rice Breeding / Guangdong Rice Engineering Laboratory, Guangzhou 510640
  • Received:2024-06-27 Revised:2024-09-15 Online:2025-04-15 Published:2025-04-11

Abstract:

This study aims to evaluate the salt tolerance of Guangdong Simiao rice varieties during the germination and seedling stages, providing a scientific basis for variety selection and theoretical guidance for Simiao rice production. Fifteen Guangdong Simiao rice varieties were selected as research objects, and their performance at different growth stages was observed through salt stress treatment, with specific evaluation indicators including germination rate and seedling survival rate. The research results show that salt stress significantly inhibits the seed germination rate and germination potential of Simiao rice varieties. Notably, during the germination and seedling stages, hybrid rice shows stronger tolerance compared to conventional rice, especially 'Qingxiangyou 19 xiang' and 'Ruanhuayoujinsi', which exhibit higher salt tolerance. In the seedling stage, varieties such as 'Xiangxiuzhan', 'Lixiangzhan', 'Nanjingxiangzhan', 'Hengfengyouyouxiang', and 'Gengxiangyoulisimiao' also show higher salt tolerance. Given the significant differences in salt tolerance among different varieties, it is recommended to give priority to varieties or hybrids with stronger salt tolerance after comprehensively considering other variety demand factors. In addition, different measures should be adopted for different varieties when facing salt stress to improve yield stability.

Key words: Guangdong Simiao rice varieties, salt stress, germination period, seedling stage, germination rate, seedling survival rate, hybrid rice varieties, conventional rice varieties