陆地棉永久 F2群体产量、杂种优势及相关关系分析

摘要

利用重组自交系RIL群体两两随机组配构建1套含98个组合的永久F2群体。通过对永久群体7个性状的杂种优势表现及其性状之间的相关性进行分析，探讨永久F2群体经济性状关系。结果表明，永久F2群体的7个性状在2年3点3个不同环境下均具有明显的杂种优势，中亲优势和优势组合率较大；产量构成因子的相关系数中铃重最大，其次是单株结铃数和衣分；永久群体的竞争优势为负向，理论上此永久F2群体不能在生产上直接利用来作为杂交亲本，但可以作为遗传群体的研究材料。%In order to analyse the heterosis of yield and traits of cotton , a set of recombinant inbred line ( RIL) de-rived from a hybrid combination ( sGK9708 × 0-153 ) was used to constructed an immortalized F 2 ( IF2 ) popula-tion.This IF2 population included 98 single crosses.The heterosis analysis of seven yield traits and their correlation of immortalized F2 population was studied .The results showed that this seven traits had obvious heterosis in different environments , middle parents advantage and advantage combination rate were both larger .In the correlation factors of production , boll weight was the greatest , followed by the boll number per plant and lint percentage .Permanent group competitive advantage was negative , so this immortalized F2 population could not be directly used theoretically in pro-duction, but it could be used as genetic group research materials .