140份甜玉米自交系耐铝性鉴定

以华南农业大学选育的140份甜玉米自交系为材料,利用0.4 mmol·L-1的AlCl3溶液处理玉米幼苗,测定其相对根长、相对叶绿素含量、相对株高、相对鲜重和相对干重等值并汇总排序,进行耐铝性鉴定分析评价.结果表明,系统聚类分析将140份甜玉米自交系分为4个类群,类群Ⅲ中自交系平均耐铝水平较高.分析140个甜玉米自交系...

Identification of Aluminum Tolerance in 140 Sweet Corn Inbred Lines

In this study,140 sweet corn inbred lines selected from South China Agricultural University were treated with 0.4 mmol·L-1 AlCl 3 solution.The root length,chlorophyll content,plant height,fresh weight and dry weight of maize seedlings were measured and sorted,and the aluminum tolerance was identified,analyzed and evaluated.The clustering analysis results show that the 140 sweet corn inbred lines can be divided into four groups,and the groupⅢof inbred lines possessed the highest aluminum tolerance compared with other two groups.The relative value and total value of each index of the 140 sweet corn inbred lines were analyzed.The total ratio of most sweet corn inbred lines was less than 5,and they were more sensitive to aluminum stress,while the total ratio of a few inbred lines was more than 5 which implied they had stronger Al-tolerance under aluminum stress.Among them,the 10 inbred lines with the largest sum of five ratios were K 117,K 77,K 83,K 56,K 91,K 99,K 138,K 86,K 92 and K 94 respectively,indicating that these 10 inbred lines had stronger tolerance to aluminum toxicity,which could provide materials for the subsequent selection of aluminum-tolerant inbred lines and creation of aluminum-resistant maize germplasm.