48份大豆种质资源全生育期耐盐碱性评价
- Title:
- Saline-alkali Tolerance Evaluation of 48 Soybean Germplasm Resources Throughout the Entire Growth Period
- 摘要:
- 为挖掘大豆种质资源中的优异耐盐碱资源,筛选出可用于创制耐盐碱品种的优异亲本材料及挖掘相关耐盐碱基因,本研究对搜集的国外资源及国内农家种、栽培种共48份大豆种质资源进行全生育期盐碱胁迫处理,即全生育期进行pH9.0盐碱处理。调查成苗率、单株粒数、种子重量和单株产量;利用高通量表型平台的RGB单元采集RGB图像数据测定外接矩形面积、外接圆面积、凸包面积和覆盖率;利用光合表型成像单元采集光合特性指标测定初始荧光、最大荧光、最大光化学效率、叶绿素指数、花青素指数和叶绿素,总共14个评价指标,应用相关性分析、主成分分析、隶属函数分析及D值综合评价法对大豆全生育期耐盐碱性进行综合评价。结果表明:在盐碱胁迫处理下,48份大豆种质资源全生育期14个评价指标变化丰富,变异系数在4.96%~40.89%之间。与对照处理相比,多个指标测量值变异系数上升,且各指标间呈现极显著或显著相关关系。通过主成分分析将14个单一指标转化为3个综合指标,分别是光合指标、形态指标及产量指标。采用D值综合评价法将参试材料分为4大类,其中公野03-5570为高耐盐碱材料,Century lx13等14份材料为耐盐碱材料,L65-540等26份材料为中间型材料,小白脐等7份材料为不耐盐碱材料,未鉴定到盐碱敏感材料。
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