玉米地方品种‘沃日黄’与其选系重组改良后代表型性状综合分析

为了探索玉米地方品种高效利用的新方法,以‘沃30’与8个重组系为研究对象,田间试验采用随机区组设计,采用表型分析、主成分分析、相关性分析与聚类分析研究了综合评价指标。结果表明:(1)‘沃30’与8个重组系间存在丰富的遗传变异,各性状变异系数为1.49%~46.79%,‘A3’和‘A4’的多个性状优于‘沃30’;(2)综合评价分析表明,3个主成分累计贡献率为90.46%,供试材料表型性状综合得分为-1.4146~2.5504,‘A4’、‘A3’和‘A1’综合得分高于‘沃30’,散粉期等6个性状与综合得分显著或极显著相关;(3)供试材料间遗传距离为0.78~2.045,当阈值设定为1.414,可分为三大类。因此,通过地方品种‘沃日黄’优株与其选系重组再选系的方法能够改良目标性状,利于进一步发掘与利用地方品种中的优良基因。

INTRODUCTION OF THE HIGH THROUGHPUT SCREENING SYSTEM

In this article, we introduce the system of high throughput screening (HTS). Its role in new drug study and current development is described. The relationship between research achievements of genome study and new type screening model of new drugs is emphasized. The personal opinions of current problems about HTS study in China are raised.