植物遗传资源学报2026，Vol.27Issue(8)：1498-1510,13.DOI:10.13430/j.cnki.jpgr.20260305001
不同地理来源粳稻种质资源的耐碱性表型差异
Phenotypic Differences in Alkaline Tolerance Among Japonica Rice Germplasm Resources from Different Geographical Origins
摘要
Abstract
To investigate the effects of alkaline stress on leaf injury and seedling survival of japonica rice,and to clarify differences in alkaline tolerance among varieties from different geographic origins,a total of 437 japonica rice germplasm resources were evaluated for alkaline tolerance in an alkaline screening pool with a pH value of approximately 8.9 during 2016-2017,with repeated assessments conducted over two consecutive years.The dead leaf rate and dead seedling rate at the seedling stage were used as the primary indicators of alkaline tolerance.The results showed that both the dead leaf rate and dead seedling rate gradually increased with prolonged alkaline stress,and significant differences in alkaline tolerance were observed among different japonica varieties.The period of 15-25 days after alkaline stress treatment was identified as the critical stage for evaluating alkaline tolerance at the seedling stage,with higher phenotypic values,standard deviation,and coefficient of variation for dead leaf rate observed at 15 days,while those of dead seedling rate were higher at 25 days.Population-level analysis revealed a regional clustering pattern of alkaline tolerance.The dead leaf rates of materials from Heilongjiang and Jilin provinces in the Northeastern rice-growing region of China were 55.45％and 55.04％,respectively,and their dead seedling rates were 28.79％and 26.19％,respectively,indicating stronger alkaline tolerance at the seedling stage.Additionally,20 alkaline-tolerant japonica rice germplasm accessions,including Kongyu 131 and Jijing 105,were identified using a two-year mean dead seedling rate≤13.33％and dead leaf rate≤45.66％as the screening criteria,providing valuable genetic resources for the improvement of japonica rice varieties adapted to saline-alkaline soils.关键词
粳稻/耐碱性/不同地理来源/表型差异Key words
japonica rice/alkaline tolerance/different geographical origins/phenotypic differences引用本文复制引用
徐玮,崔迪,杨春刚,张强,马小定,金京花,韩冰,张三元,郭晓红,韩龙植..不同地理来源粳稻种质资源的耐碱性表型差异[J].植物遗传资源学报,2026,27(8):1498-1510,13.基金项目
国家重点研发计划(2021YFD1200500) （2021YFD1200500）
中国农业科学院科技创新工程 （）
黑龙江省自然科学基金校(院)企合作项目National Key Research and Development Program of China(2021YFD1200500) （院）
Agricultural Science and Technology Innovation Program of Chinese Academy of Agricultural Sciences （）
Heilongjiang Provincial Natural Science Foundation University(Institute)Enterprise Cooperation Project （Institute）
