玉米基础种质杂种优势模式分析

Analysis on Heterosis Patterns of Corn Hybrid Basic Germplasm

选用国内10个基础种质自交系进行完全双列杂交组配45个杂交组合,对穗粒重的总配合力、超中亲优势、超高亲优势进行了分析。研究表明:穗粒重、总配合力、超中亲优势和超高亲优势4项指标反映穗粒重杂种优势基本是一致性的。玉米穗粒重的杂种优势模式是一种动态模式,随不同的种质资源、不同的时间、不同地域而变化。代表P群的2个自交系齐319、沈137与其它类群种质具有较高的配合力。试验所在地铁岭主要杂种优势模式为旅大红骨类群×P群、Reid类群×旅大红骨类群、塘四平头类群×P群和Lancster类群×P群。

In present paper total combining ability, over mid-parent and over high-parent about ear weight were analyzed With 45 crosses made from 10 maize inbred lines of basic germplasm in domestic by Griffing 1V design.The results showed that the heterosis reflected by ear weight, general combining ability, over mid-parent and over high-parent were almost consistent. Heterosis patterns of ear weight were dynamic and changed with different germplasm resources, the different times and the different regions. Qi 319 and Shen137 maize inbred lines came from P group were high in general combining ability with other germplasm group. Main heterosis pattern at local place in this study： Lvdahonggu group × P group, Reid group ×Lvdahonggu group, Tangsipingtou group x P group, Lancaster group × P group.