东北大豆丰产种质的拓宽与改良——Ⅰ.品种间杂交F_1代杂种优势与配合力分析

IMPROVEMENT OF SOYBEAN HIGH YIELD GERMPLASM IN NORTHEAST Ⅰ. HETEROSIS AND COMBINING ABILITY IN F_1 AMONG VARIETAL CROSSES

本文应用东北地区4个主栽品种和两个国外品种为亲本,采用Griffing4双列杂交设计,对亲本及F_1代的主要农艺性状进行杂种优势和配合力分析。结果表明,杂种F_1代主要产量性状有较高的正向杂种优势。文中探讨了配合力分析的目的。指出MSg/MSs是杂交组合后代性状选择早晚的一个重要遗传参数。产量一般配合力大的优良亲本为黑农33、MA1388和吉林20。产量高,特殊配合力大的最佳组合为黑农33×MA1388。

Complete diallel cross Griffing 4 was used to study heterosis and combining ablity among varietal crosses in F1 by using four main cultivars in Northeast and two exotic germ plasms.The results indicated that there was a higher heterosis of crosses with exotic varieties as one of the parents in the F1 The objective of combining ability analysis was discussed. It was point- ed out that MSg/MSs was an important hereditary parameter for selecting characters among progenies .of the following cross generations. Promising parents with large GCA of yield were Heinong 33, MA1388, and Jilin 20. Best cross with high yield and large SCA of yield was Heinong 33× MA 1388.