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大豆科学  2007 

大豆品种苗期根系性状的遗传变异及其与耐逆境胁迫的关系

DOI: 10.3969/j.issn.1000-9841.2007.02.002, PP. 127-133

Keywords: 大豆,耐逆相关根系性状,遗传变异

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Abstract:

从301份黄淮海和长江中下游地区代表性大豆地方品种和育成品种(系)中按根系类型选取62份,用以研究不同生态区大豆苗期根系性状的遗传特点、与地上部性状的相关以及与逆境胁迫的关系。大豆苗期一级侧根数、主根长、根干重、总根长和根体积等性状,在品种间、各苗龄间均存在显著遗传变异。不同生态区间生长进度不同,长江中下游晚熟品种的根干重、总根长、根体积发育速度较快,而北方早熟品种的根系发育较慢。根系性状与整株干重呈高度相关;根干重、根总长和根体积的相对值与耐旱平均隶属函数值,一级侧根数、主根长、总根长、根体积、根干重的相对值与耐铝毒平均隶属函数值呈极显著相关,且根系性状的相对值在品种间存在显著变异,可用做耐逆性选择的根系指标。黄淮海区品种的耐旱相关根系性状值高于长江中下游区品种,表明耐旱种质的相关根系性状具有生态适应性。

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