By crossing CSSLs with the same genetic background, many elite alleles located on different fragments can be rapidly pyramided and new varieties with more favorable traits can be bred. 利用遗传背景相同的CSSL之间杂交,可以将不同片段上的多个优良基因快速聚合,培育出具有更多优良性状的新品种。
And 2 QTL associated with oil and starch concentration were not affected by other characters, which could be pyramided in single QTL level. 与籽粒油分、蛋白质和淀粉含量相关的3个、0个和2个QTL基本不受其它性状的影响,可以实现单个QTL的分子聚合。
Most of hybrid rice has no resistance to bacterial blight ( BB). One or two resistance genes were transferred or pyramided into male sterile lines or restorer lines through crossing and back-crossing breeding in order to improve their resistance or durable resistance. 我国多数杂交水稻组合不抗白叶枯病,本研究通过杂交、回交将单个或多个抗病基因转到或聚合到不育系和恢复系中,对杂交水稻进行抗性改良。