玉米自交系发芽期和苗期耐寒性的鉴定

被引：32

作者：

郑昀晔

胡晋

张胜

高灿红

宋文坚

机构：

[1] 浙江大学农学系

来源：

浙江大学学报(农业与生命科学版) | 2006年 / 01期

关键词：

玉米自交系; 耐寒性鉴定; 聚类分析; 相关性分析;

D O I：

暂无

中图分类号：

S513 [玉米（玉蜀黍）];

学科分类号：

0901 ;

摘要：

试验对玉米9个自交系发芽和苗期的耐寒性进行了鉴定,在常温(25℃)和低温(11℃)胁迫下分别测定了种子发芽特性及幼苗素质的各项指标.以各性状低温与常温下测定值的比值(相对值)作为耐寒性评价指标.结果表明,在低温逆境下,苗比根对低温更敏感,耐寒自交系的根和幼苗总干重未下降.通过聚类分析,解决了由于性状相对值差异微小而难以评价自交系耐寒性的问题,将自交系分成了耐寒、中等耐寒和低温敏感3类.相关性分析表明,相对发芽率、相对幼苗总干重、相对地上部苗干重、相对根干重之间显著相关,是较好的耐寒性评价指标.

引用

页码：41 / 45

页数：5

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