玉米自交系主要数量性状聚类分析

CLUSTER ANALYSIS OF MAIN QUANTITATIVE CHARACTERS OF MAIZE INBRED LINES

本文研究了玉米自交系主要数量性状的遗传距离及其杂种优势,结果表明:生产上应用的杂交种大多是双亲遗传距离较大的,但是遗传距离与杂种优势之间未见明显的相关性。双亲遗传距离的大小不能作为评价组合优劣的唯一标准。

The genetic distance and their heterosis of mam quantitative characters in some corn inbred lines were studied in the test. The results showed that the parents of most hybrids used in production are usually with large genetic distance, But obvious correlation between genetic distahce of inbred lines and their heterosis was not found. Because of this, the values of genetic distance between inbred lines can not be considered as the only indices for evaluating hybrid crosses.