旅大红骨群自交系杂种优势研究

以5个来源不同的玉米自交系组成的杂交组合为材料,对旅大红骨群自交系的杂种优势进行了初步研究。结果表明:旅大红骨群与Reid、Pa、Pb群之间的杂种优势均随性状不同而有所差异,杂交组合不同后代的杂种优势表现也不同;在种质改良过程中Pa×旅模式后代的杂种优势较强,从抗旱性角度来看,Reid×旅模式具有显著优势;旅大红骨群自交系作为父本对后代在多个性状上的影响大于母本自交系,在利用不同性状对后代进行改良时应注重旅群与其他群不同组合模式的应用。

Studies on Heterosis of Ludahonggu Group''s Inbreds in Maize

Five inbreds of maize from different sources and their hybrids wer e used in the experiment.Through preliminary studies on the heterosis of Ludahon ggu group, the results were as follows: 1. The heterosis between Ludahonggu grou p and Reid group, Pa, and Pb group were different to some extent, which changed with different characteristics; as father lines Ludahonggu group influenced its descendants more than mother lines; 2.The application of different hybridism mod els between Ludahonggu group and other groups should be paid much attention when reforming hybrids through using different characters.