Yi Huying,Yu Hongbin.The Radiative Sensitivity of 25 Alfalfa in the Loess Plateau[J].Research of Soil and Water Conservation,1987,(02):63-68.
黄土高原25个苜蓿品种的辐射敏感性
- Title:
- The Radiative Sensitivity of 25 Alfalfa in the Loess Plateau
- 摘要:
- 本实验选用了黄土高原上种植的25个苜蓿品种，用60Coγ射线8万、9万、10万、11万和12万伦对于种子进行照射。实验结果证明：苜蓿对辐射反应的程度可划分为三种类型—敏感型、中间型和迟钝型。苜蓿的出苗率和幼苗高度随着照射量的增加而下降。苗高和出苗率之间呈指数函数关系.根尖细胞的微核率和染色体畸变率随着剂量的增加而增加。通过出苗率、苗高、微核率和染色体畸变率等指标综合鉴定，黄土高原上苜蓿的适宜剂量是4.8万—9.8万伦。
- Abstract:
- Alfalfa(Medicago Sativa)25 varieties planted in the loess plateau were chosen for this investigation.Their dry seeds were exposed with 60Coγ ray at 8 to 12 kR.The experimental results indicated that the alfalfas has been divided into three typs-sensitive,moderation and dull,according to extent of repose of alfalfas on radiation. Seedling height and fieldger ruination decreased as the radiation exposure increased.Exponential function relationship was found between Seedling height and yield germination.Frequency of micronuclei of root tip cells and chromosomal aberration increased as the radiation exposure increased. The criteria used for determineing useful dose range of alfalfa for mutation breeding were yield germination,seedling height,frequency of micronuclei and chromosomal aberration.The Alfalfa planted on loess plateau has a useful dose of 4.8 to 9.8kR.
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