Relationship between waterlogging tolerance indexes and yield traits at rapeseed germination stage under waterlogging stress

MA Wu-hui; LUO Li-ya; YANG Long; CHENG Yong; XU Ben-bo; XU Jin-song; ZHANG Xue-kun

doi:10.19802/j.issn.1007-9084.2026011

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Relationship between waterlogging tolerance indexes and yield traits at rapeseed germination stage under waterlogging stress

更新时间：2026-10-31

- Relationship between waterlogging tolerance indexes and yield traits at rapeseed germination stage under waterlogging stress
- Chinese Journal of Oil Crop Sciences Vol. 48, Issue 4, Pages: 119-133(2026)
- 作者机构：
  
  1.长江大学农学院，湖北荆州，434025
  2.中国农业科学院油料作物研究所，湖北武汉，430062
- 作者简介：
- 基金信息：
- DOI：10.19802/j.issn.1007-9084.2026011
  CLC： S565.4
- Received：10 January 2026，
  
  Published：25 August 2026
- 稿件说明：
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马伍慧,罗丽娅,杨龙等.油菜发芽期耐渍性与渍害下产量性状的关系分析[J].中国油料作物学报,2026,48(04):119-133.

MA Wu-hui,LUO Li-ya,YANG Long,et al.Relationship between waterlogging tolerance indexes and yield traits at rapeseed germination stage under waterlogging stress[J].Chinese Journal of Oil Crop Sciences,2026,48(04):119-133.
马伍慧,罗丽娅,杨龙等.油菜发芽期耐渍性与渍害下产量性状的关系分析[J].中国油料作物学报,2026,48(04):119-133. DOI： 10.19802/j.issn.1007-9084.2026011.

MA Wu-hui,LUO Li-ya,YANG Long,et al.Relationship between waterlogging tolerance indexes and yield traits at rapeseed germination stage under waterlogging stress[J].Chinese Journal of Oil Crop Sciences,2026,48(04):119-133. DOI： 10.19802/j.issn.1007-9084.2026011.

摘要

长江流域是我国油菜核心产区，阴雨渍害频发，严重制约油菜生产。为加强品种早期选择的准确性，为耐渍品种快速筛选提供支撑，本文分析了油菜种质资源耐渍性状的遗传多样性，以及发芽期耐渍性与渍害后产量的关系，选取42 个推广面积较大的冬油菜品种，于2020年（阴雨渍害）、2021年（正常降雨）秋季进行播种，成熟后，系统调查各品种产量及农艺性状，同步开展室内发芽耐渍性试验。通过描述性分析、聚类分析综合评价油菜发芽耐渍性的遗传多样性，通过线性回归、通径分析探究油菜发芽耐渍性与渍害后产量的关系。耐渍性状的变异系数分布为6%~55.03%，其中，根长指数、活力指数和下胚轴指数的变异系数较高，分别是55.03%、28.39%和23.45%；通过聚类分析可将42个品种划分为4类，其中Ⅰ型具有较高的下胚轴指数和鲜重指数，Ⅱ型品种具有高存活率的特性，Ⅲ型具有高根长指数，Ⅳ型发芽期各性状不突出。下胚轴指数对渍害胁迫下的产量具有极显著的相关性，相比其他指标，其预测的准确性最高。通径分析显示，阴雨渍害下，鲜重指数、下胚轴指数通过影响收获密度，进而影响产量，存活率通过单株有效角果数间接作用于产量。42份油菜种质具有丰富的表型遗传变异及多样性，可聚为4个不同的类群，下胚轴指数可作为耐渍性评价的核心指标，用于预测渍害胁迫下油菜的实际产量。

Abstract

The Yangtze River Basin is the core rapeseed-producing region in China. Frequent rain in the season severely restricts rape production. To improve the accuracy of early selection for rapeseed varieties

the study reports diversity of waterlogging tolerance traits in rapeseed germplasm resources

and relationship between waterlogging tolerance at germination stage and yield after waterlogging stress. Forty-two widely popularized winter rapeseed varieties were sown in autumn of 2020 (waterlogging) and 2021 (normal rainfall). Yield and agronomic traits of each variety were systematically investigated at maturity

and indoor waterlogging tolerance tests at germination stage were conducted simultaneously. Descriptive analysis and cluster analysis were used to comprehensively evaluate the diversity of waterlogging tolerance at germination stage

and linear regression and path analysis were applied to explore the relationship between waterlogging tolerance and yield. The coefficient of variation of waterlogging tolerance traits ranged from 6% to 55.03%

among which CVs of root length index

vigor index and hypocotyl index were relatively high

being 55.03%

28.39% and 23.45%

respectively. The 42 varieties could be divided into 4 clusters: Cluster Ⅰ showed higher stem index and fresh weight index

Cluster Ⅱ was characterized by high survival rate

Cluster Ⅲ had high root length index

and all traits of Cluster Ⅳ were not prominent. Stem length index had an extremely significant correlation with yield under waterlogging stress

and its prediction accuracy was the highest compared with other indices. Path analysis showed that under waterlogging stress

fresh weight index and stem length index affected yield by influencing harvest density

while survival rate exerted indirect effect on yield via effective silique number per plant. The 42 rapeseed accessions are revealed to have abundant phenotypic genetic variation and diversity. They are clustered into 4 distinct groups

and stem length index could be used as a core indicator for evaluating waterlogging tolerance

which is suitable for predicting the actual yield of rapeseed under waterlogging stress. The relationships between different waterlogging tolerance indices at germination stage and key agronomic traits were clarified

which could feciliate rapid screening of waterlogging-tolerant varieties.

关键词

Keywords

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