大豆种质资源芽期耐旱鉴定及综合评价
- Title:
- Identification and Comprehensive Evaluation of Drought-tolerance Soybean Germplasm Resources at Bud Stage
- 摘要:
- 为筛选出大豆芽期耐旱种质资源,本研究采用20%的聚乙二醇(PEG6000)模拟干旱胁迫对来自国内外的258份大豆资源开展芽期耐旱鉴定,以发芽势、发芽率、发芽指数、相对发芽势、相对发芽率、相对发芽指数和干旱伤害率为鉴定指标,最后通过隶属函数值对大豆资源芽期耐旱性进行评价及聚类分析。结果表明:胁迫条件下,各指标在品种间均差异显著;相关性分析表明隶属函数与各指标显著正相关,干旱伤害率与其他各指标呈显著负相关。根据隶属函数值将258份种质资源分成4类:耐旱型品种(系)9个;次耐旱型品种(系)55个;次敏感型品种(系)186个;敏感型品种(系)8个。通过隶属函数聚类分析将258份材料分成了3类:耐性材料17份,如吉林小粒豆7号、东大2号等,占总体材料的6.59%;中间型99份,如垦丰13、垦农18等,占总体材料的38.37%;敏感材料142份,如黑河38、龙豆2号等,占总体材料的55.04%。研究结果将为大豆耐旱育种及芽期耐旱遗传机制研究提供适宜种质资源。
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