植物遗传资源学报2025，Vol.26Issue(1)：90-107,18.DOI:10.13430/j.cnki.jpgr.20240320005
盐碱胁迫对粳稻种质资源穗部形态建成的影响
Effects of Saline-alkaline Stress on the Morphogenesis of Panicle of Japonica Rice Germplasm
摘要
Abstract
Saline-alkaline stress is a critical limiting factor for high-yield and stable production of rice.Elucidating the effects of different saline-alkali soils on rice panicle morphology,and screening saline-alkali-tolerant rice germplasm accessions are of great significance to the breeding of saline-alkali tolerant rice varieties.In the present study,normal paddy soil was used as control(CK),with two different types of saline-alkali soil being used as experimental treatments.Treatment Ⅰ and Ⅱ focused on salt and alkali stresses,respectively.A total of 164 japonica rice germplasm accessions were examined for 11 panicle traits.Then,multivariate statistical methods,such as correlation analysis,principal component analysis(PCA),linear regression analysis(LRA)and path analysis were used for a comprehensive evaluation of the panicle traits under different saline and alkaline adversities.Under the two saline-alkali treatments,spike length(SL),grain number per panicle(GNP),grain density(GD),grain number of primary branch(GNPB),primary branch number(PBN),grain number of secondary branch(GNSB),and secondary branch number(SBN),were significantly reduced if compared to CK.Compared with treatment Ⅱ,Treatment Ⅰ showed significantly increased in SL,GNP,secondary branch grain density(SBGD),GNSB,and SBN.These findings suggest that salt stress exerts a less substantial impact on these traits than alkali stress.Under different treatment conditions,variations on the correlation among 11 panicle traits were noted.Particularly,a significant positive correlation between the thousand grain weight(TGW)and seed setting rate(SSR)under the two saline-alkali conditions was detected,while no significant correlation under CK condition was found.PCA with 11 evaluation index from CK,treatment Ⅰ and treatment Ⅱ suggested three major components,with cumulative contribution rate of 80.412％,86.441％and 83.861％,respectively.Using LRA and PCA,GNP,GD,GNPB and PBN were selected as the key indexes for evaluating panicle morphology of japonica rice under saline-alkali condition.Five saline-alkali-tolerant japonica rice accessions,namely Liaogeng 1201,Pinggeng 8,Fengdao 508,Song 820,and Ninghui 1,were identified through a comprehensive evaluation value D of panicle traits,and they can be used as valuable parental lines for rice-plant-architecture breeding under intricate saline-alkali environments.关键词
粳稻/种质资源/盐碱胁迫/穗部/形态建成Key words
Oryza sativa japonica/germplasm resource/saline-alkaline stress/panicle/morphogenesis引用本文复制引用
孔维儒,宋佳伟,段凯蓉,乔承彬,冯培媛,马帅国,李培富,罗成科,田蕾..盐碱胁迫对粳稻种质资源穗部形态建成的影响[J].植物遗传资源学报,2025,26(1):90-107,18.基金项目
国家自然科学基金资助项目(32260492) （32260492）
宁夏自然科学基金优秀青年项目(2022AAC05011) （2022AAC05011）
国家重点研发计划项目课题(2021YFD1900603)National Natural Science Foundation of China(32260492) （2021YFD1900603）
Natural Science Foundation of Ningxia Outstanding Youth Project(2022AAC05011) （2022AAC05011）
National Key Research and Development Project(2021YFD1900603) （2021YFD1900603）
