向日葵种质资源的耐盐性评价
作者:
作者单位:

1.中国农业科学院油料作物研究所/农业农村部油料作物生物学与遗传育种重点实验室,武汉 430062;2.巴彦淖尔市农牧业科学研究院,内蒙古巴彦淖尔 015000

作者简介:

研究方向为特色油料种质资源与遗传育种,E-mail:h4hercules@163.com;

通讯作者:

谭美莲,研究方向为特色油料作物种质资源、育种及栽培技术,E-mail:meiliantan@126.com

中图分类号:

基金项目:

农业种质资源普查收集、保护鉴定服务;财政部和农业农村部国家特色油料产业技术体系(CARS-14-1-17)


Salt Tolerance Evaluation of Sunflower Germplasm Resources
Author:
Affiliation:

1.Oil Crops Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Wuhan 430062;2.Bayannur Institute of Agriculture and Animal Husbandry, Bayannur 015000,Inner Mongolia

Fund Project:

Foundation projects: The Project of Agricultural Germplasm Resources Survey, Collection, Protection, and Identification Services;China Agriculture Research System of MOF and MARA (CARS-14-1-17)

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    摘要:

    为了解向日葵种质资源的耐盐性,鉴定发掘向日葵耐盐优异种质,对444份种质资源分别进行了芽期(250 mmol/L NaCl)、苗期(250 mmol/L NaCl)耐盐鉴定和盐碱地全生育期种植观察,通过测定芽期发芽率、苗期存活率、叶面积、株高、SPAD值等6个苗期指标和全生育期株高、葵盘直径、结实率、相关产量等7个指标的相对值(各指标与对照处理的相应比值)进行耐盐性分析评价。相关性分析结果表明苗期两两指标间均呈极显著正相关,相关系数在0.518-0.790之间;全生育期7个指标中多数指标间的相关性都达到了显著或极显著水平。基于指标相对值进行主成分分析、隶属函数值计算、耐盐性综合评价和聚类分析,筛选出芽期耐盐及以上种质132份、苗期耐盐及以上种质9份、全生育期耐盐及以上种质41份,其中6份种质(ZX0365、ZX0389、ZX1391、ZX1394、ZX3089、ZX3094)在3个时期均表现为耐盐及以上等级,综合耐盐性好,可作为耐盐基因挖掘和耐盐品种选育等后续利用的种质材料。对其中124份种质3个时期(芽期、苗期、全生育期)的耐盐等级进行相关性分析,结果表明各时期的耐盐性鉴定结果极显著相关,芽期和苗期的耐盐鉴定结果可为盐碱地种植向日葵选择耐盐材料提供有效参考。本研究为向日葵耐盐品种选育提供了方法和材料基础。

    Abstract:

    In order to evaluate salt tolerance in sunflower germplasm resources and identify elite accessions, the salt tolerance of 444 sunflower germplasm resources was evaluated under 250 mmol/L NaCl stress at germination and seedling stage, and also assessed under saline-alkali soil condition at the whole growth period.The salt tolerance analysis and evaluation was performed by observing a number of traits including the relative values(ratio of each indicator compared to the control treatment)of germination rate at germination stage,six indexes at seedling stage (survival rate,leaf area,plant height,SPAD value,etc.)and seven indexes at the whole growth period(plant height,sunflower diameter,seed setting rate,yield related traits,etc.) The correlation analysis results indicate that there was a highly significant positive correlation between each two indexes at seedling stage, with correlation coefficients ranging from 0.518-0.790. The correlation between most of the seven indicators in the whole growth period reached a significant or extremely significant level. The analysis of principal component, membership function value, cluster and comprehensive salt tolerance evaluation were performed based on these relative indicator values, then 132 salt resistant materials at germination stage, 9 at seedling stage, and 41 at whole growth stage were identified. Six germplasm resources (ZX0365, ZX0389, ZX1391, ZX1394, ZX3089, ZX3094), which showed salt tolerance in the three periods, can be utilized for subsequent salt-tolerant gene mining and breeding. Correlation analysis of salt tolerance levels for 124 accessions at three stages (germination, seedling, and the whole growth period) indicated a highly significant correlation among the salt tolerance assessments at each stage. The salt tolerance assessments of the germination and seedling stages can provide effective references for selecting salt-tolerant materials when planting sunflower in saline-alkali soil.This study provided method and material basis for the selection of salt-tolerant sunflower varieties.

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李玉骁,汪磊,汪魏,等.向日葵种质资源的耐盐性评价[J].植物遗传资源学报,2024,25(9):1480-1492.

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  • 收稿日期:2023-11-30
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  • 在线发布日期: 2024-09-02
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