陆地棉永久IF2群体的品质性状杂种优势及相关关系研究

摘要

The heterosis of fiber quality traits and their correlation of the immortalized F2 population in three environments,were analyzed to provide the scientific basis for the rational use of the permanent popula-tion in production.The results showed that the quality characters of fiber length, fiber strength, uniformity of permanent IF2 populations had the positive mid parent heterosis in different environments,but the advantage was not big.The heterosis of micronaire value,and that of elongation were positive or negative.The yield had a highly significant positive correlation with fiber length,uniformity,micronaire values and had an extremely sig-nificant negative correlation with elongation.The fiber strength and uniformity of the permanent population had a positive and obvious competitive advantage.%通过对两年3个环境下陆地棉永久IF2群体的品质性状的杂种优势表现及其性状之间的相关性进行分析，研究永久IF2群体品质性状关系，为生产上合理运用永久群体提供科学依据。结果表明，永久IF2群体的品质性状纤维长度、整齐度、纤维强度在不同环境下都具有正向中亲杂种优势，但是优势不大，而马克隆值、伸长率在不同环境下的中亲优势有正向也有负向。单株籽棉产量与纤维长度、马克隆值、整齐度极显著正相关，与伸长率呈极显著负相关，永久群体纤维强度与整齐度具有明显的正向竞争优势。