大白菜核基因雄性不育系的合成转育研究

Study on Synthesis Model for Breeding Genic Male Sterile Lines of Chinese Cabbage

根据"复等位基因遗传假说",以大白菜核基因雄性不育系3A为不育源,按照合成转育模式将核不育基因向可育品系sl05中转育。遗传分析表明,可育品系sl05的基因型为MsfMsf,新甲型"两用系"和新临时保持系可从3A和sl05的F2后代中获得。以新甲型"两用系"的不育株为母本与新临时保持系进行杂交,获得了不育株率100%的新不育系。

<Abstrcat> Synthesis model was applied to transfer genic male sterility from 3A(genic male sterile line) to sl05(selfing line) and to breed new male sterile lines in accordance with Multiple Allele Hypothesis of Chinese cabbage. The hereditary analysis showed that the genotype of sl05 is Ms^fMs^f. As a result, a series of new AB lines typeⅠand new temporary maintainer lines were obtained from self progenies of F_2 crossing 3A with sl05, and new genic male sterile lines with 100% sterility from crossing between the male sterile plants of new AB lines typeⅠand new temporary maintainer lines.