河南农业科学2025，Vol.54Issue(8)：26-37,12.DOI:10.15933/j.cnki.1004-3268.2025.08.003
盐碱胁迫对粳稻种质资源营养与生殖生长的影响
Effects of Saline-Alkali Stress on Vegetative and Reproductive Growth of Japonica Rice Germplasm Resource
摘要
Abstract
Using 164 japonica rice germplasm resources as test materials,the effects of saline-alkali stress[normal paddy soil(control,CK),alkalized saline soil(T1)and alkali soil(T2)]on plant height(PH),tillers number per plant(NT),basal stem diameter(SD),days from sowing to heading(S-FHD),effective panicles number per plant(PNPP),total grains number per plant(SPP),1 000-grain weight(TGW),seed setting rate(SSR)and yield per plant(YPP)were studied under field conditions.Comprehensive evaluation was conducted by combining correlation analysis,principal component analysis and membership function to screen saline-alkali tolerant germplasms during the whole growth period.The key indicators affecting the vegetative and reproductive growth of rice under different saline-alkali stresses were screened through linear regression analysis,so as to provide theoretical basis for breeding saline-alkali tolerant and high-yielding rice varieties.The results showed that under the T1 and T2 treatments,PH,SPP and YPP of the japonica rice germplasm were significantly lower than those of CK.The differences of the above 9 traits between T1 and T2 treatments were all significant.The correlation analysis results showed that PH,SPP and S-FHD were significantly or extremely significantly positively correlated with each other,and PH was significantly or extremely significantly positively correlated with TGW and YPP under all treatments.Under T1 and T2 treatments,PNPP was significantly or extremely significantly negatively correlated with PH and S-FHD,while TGW was significantly or extremely significantly positively correlated with SSR and YPP.However,the correlations of the above traits did not reach significant levels under CK.Principal component analysis results showed that 4 principal components were extracted under CK,T1 and T2 treatments,with cumulative contribution rates of 79.550%,82.530%and 79.076%,respectively.Combined the key factor load values of each principal component with the R2 values of the linear regression equations between the 9 traits and the comprehensive saline-alkali tolerance D value,PH,SPP and S-FHD were determined as the key indicators affecting the vegetative and reproductive growth of japonica rice germplasms under saline-alkali stress.According to the D value,two saline-alkali tolerant germplasms,Liujing 2 and Bijing 45,were screened.关键词
粳稻/盐碱胁迫/营养生长/生殖生长/线性回归分析Key words
Japonica rice/Saline-alkali stress/Vegetative growth/Reproductive growth/Linear regression analysis分类
农业科技引用本文复制引用
段凯蓉,马东花,李培富,罗成科,田蕾,冉杰,宋佳伟,乔承彬,孔维儒,董悦,刘松瑞,张碧,许昊..盐碱胁迫对粳稻种质资源营养与生殖生长的影响[J].河南农业科学,2025,54(8):26-37,12.基金项目
国家重点研发计划项目(2021YFD1900603) （2021YFD1900603）
