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Comprehensive screening of salt-tolerant rice germplasm using a fuzzy membership and PCA-based evaluation model

文献类型： 外文期刊

作者： Jin, Dingsha 1 ; Iqbal, Asif 3 ; Huang, Mengshu 1 ; Liu, Yuqing 1 ; Zhang, Yage 1 ; Lin, Youzhen 1 ; Tang, Liqiong 2 ; Wang, Xinhua 2 ; Wang, Junjie 1 ; Cao, Guangping 2 ; Xu, Yanchao 4 ; Xu, Peng 5 ; Wang, Xiaoning 1 ;

作者机构： 1.Hainan Acad Agr Sci, Sanya Inst, Sanya 572000, Peoples R China

2.Hainan Acad Agr Sci, Inst Food Crops, Hainan Key Lab Crop Genet & Breeding, Haikou 571100, Peoples R China

3.Hazara Univ, Dept Agr, Mansehra 21120, Khyber Pakhtunk, Pakistan

4.Chinese Acad Agr Sci, Natl Nanfan Res Inst Sanya, Sanya 572024, Peoples R China

5.Chinese Acad Sci, CAS Key Lab Trop Plant Resources & Sustainable Use, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China

关键词： Rice germplasm; Salt tolerance; Soil salinization; Seedling stage evaluation; Fuzzy membership function; Breeding for stress resilience

期刊名称：EUPHYTICA （ 影响因子：1.7； 五年影响因子：1.8 ）

ISSN： 0014-2336

年卷期： 2025 年 221 卷 9 期

页码：

收录情况： SCI

摘要： Soil salinization is intensifying globally, posing a serious threat to land resource utilization and agricultural productivity. Rice (Oryza sativa), a moderately salt-sensitive crop, is a preferred choice for reclaiming saline-alkali lands. Developing salt-tolerant rice varieties is therefore essential for enhancing soil productivity and ensuring global food security. Despite this urgency, comprehensive evaluation systems and reliable indicators for assessing rice salt tolerance remain limited. In this study, 631 rice germplasm resources were evaluated for salt tolerance and sensitivity at the seedling stage using a soil culture method. A robust evaluation model (D-value) was established by integrating correlation analysis, principal component analysis, and the fuzzy membership function method. Based on this model, the germplasms were classified into five categories: highly salt-tolerant (77), salt-tolerant (142), moderately salt-tolerant (144), salt-sensitive (158), and highly salt-sensitive (110). Key evaluation indicators, salt tolerance level, leaf mortality rate, and control shoot length were identified as effective predictors of salt tolerance. Interestingly, rapid seedling growth under control conditions showed a negative correlation with salt stress tolerance. These findings provide valuable theoretical insights and genetic resources for deciphering the molecular mechanisms of salt tolerance and for breeding salt-tolerant rice varieties, contributing to the sustainable use of saline-alkali farmlands and global food security.

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