小麦衡9966与亲本及近缘品种萌发期抗旱性比较
xiandai nongcun keji（2019）
Abstract
以小麦品种衡9966与其亲本良星99和良星66及近缘品种济麦22为试验材料,采用不同浓度的PEG-6000模拟干旱胁迫条件,对其发芽率、 发芽势、 发芽指数、 活力指数、 苗高、 根长和鲜重等萌发指标进行测定.结果表明:10％干旱胁迫处理对各品种种子萌发与生长的抑制作用均不显著,随着PEG浓度的增加(15％～20％),抑制作用显著增强,但对4个品种抑制程度不同.采用平均隶属函数法对PEG-6000胁迫的各指标进行综合比较评价,得出结论:衡9966与其亲本品种良星99为较抗旱品种;另一亲本品种良星66为弱抗旱品种;其近缘品种济麦22为强抗旱品种.
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