西昌地区玉米自交系苗期耐低磷特性鉴定

Identification of Resistance to Low-phosphorus Characteristics of Maize Inbred Lines at Seedling Stage in Xichang Area

为筛选耐低磷玉米种质,在大田种植条件下,通过对苗期部分性状的考察,对攀西地区115份玉米地方品种进行耐低磷胁迫筛选试验。结果表明:相对株高、相对茎粗、相对可见叶数、相对成活叶数以及叶片缺素指数可作为耐低磷特性鉴定和评价的指标。根据这些指标发现115份地方品种对低磷胁迫的反应差异极显著,鉴定出19份极强耐低磷自交系;17个强耐低磷自交系;16份自交系表现出对低磷胁迫极敏感,其它则表现为中间型。

In order to select maize germplasm with resistance to lowphosphorus, 115 local maize varieties of Panxi area were used to conduct the field experiment under lowphosphorus stress by investigating Some char acteristics at seedling stage. The results showed that relative plant height, relative stem diameter, relative visi ble leaves number,relative survive leaves number and leaf nutritional deficiency index could be used as index to identify and evaluate resistance to lowphosphorus. According to those index,it found that the differences of re action of the 115 local varieties were significant, 19 maize inbred lines were extremely significant resistant to lowphosphorus, 17 inbred lines significant resistant to lowphosphorus, 16 inbred lines significant sensitive to lowphosphorus,others were performance medium type.