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有色稻米优良的营养品质和特异性状与低产的突出矛盾一直制约着其生产的发展,杂种优势利用是解决这一问题的首要措施。无论“三系法”还是“两系法”,有色稻米亚种间杂种优势利用的前提必须保证亲本之一携有广亲和基因和有色基因,以利用有色基因的显性遗传本质;同时又要克服双亲闻的杂交不亲和性和目标性状的负向优势。保证合理的遗传距离,即使性状互补,又使优势强大,则是有色稻米杂优利用亲本选育或材料方法选用的关键。本文针对水稻杂优利用常用籼型不育系(“三系”或”两系”)的现状与广亲和恢复系的配合模型,结合粳型红米恢复系的选育实践,对其亚种间杂优利用途径进行探讨,认为利用杂交方法,选育粳型或偏粳型红米恢复系是利用有色稻米亚种间杂种优势的一条有效途径。
The prominent contradiction between excellent nutritional quality and specific traits of colored rice and low yield has always restricted the development of its production. Utilization of heterosis is the primary measure to solve this problem. Regardless of the “three lines” or “two lines of law”, the prerequisite for heterosis utilization among the non-ferrous rice subspecies must ensure that one of the parents carries a wide range of affinity genes and chromogenic genes to take advantage of the dominant genetic nature of the chromosomal genes; meanwhile, To overcome the incompatibility of crossbreeding and the negative advantages of the target trait. To ensure a reasonable genetic distance, even if the traits complement each other, but also make the advantages of strong, it is the key to the use of parental breeding or material selection of colored rice hybrids. In this paper, based on the current situation of common indica CMS lines (“three lines” or “two lines”) and the compatibility model of wide compatibility restorer lines in rice hybrids, combining with the breeding practice of japonica red rice restorer lines, It is considered that using the hybridization method to breed japonica or japonica rice restorer lines is an effective way to utilize heterosis among the non-ferrous rice subspecies.