Development of Ogura CMS Fertility-Restored Interspecific Hybrids for Use in Cytoplasm Replacement of Golden-Heart Materials in Brassica rapa

文献类型： 外文期刊

第一作者： Li, Ze

作者： Li, Ze;Li, Guoliang;Li, Fei;Zhang, Shifan;Wang, Xiaowu;Wu, Jian;Sun, Rifei;Zhang, Shujiang;Zhang, Hui;Li, Ze;Li, Guoliang;Li, Fei;Zhang, Shifan;Wang, Xiaowu;Wu, Jian;Sun, Rifei;Zhang, Shujiang;Zhang, Hui

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关键词： Ogura CMS; restorer of fertility gene (Rfo); GOLDEN gene; Brassica rapa

期刊名称：GENES （ 影响因子：3.5； 五年影响因子：3.9 ）

ISSN：

年卷期： 2023 年 14 卷 8 期

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收录情况： SCI

摘要： Ogura cytoplasmic male sterility (CMS) is one of the important methods for hybrid seed production in cruciferous crops. The lack of a restorer of fertility gene (Rfo) in Brassica rapa L. restricts the development and utilization of its germplasm resources. In this research, Brassica napus with the Rfo gene was used to restore the fertility of Ogura CMS B. rapa with the golden heart trait. Through the distant cross of two B. rapa and four B. napus, six interspecific hybrid combinations received F1 seeds. The six combinations were different in seed receiving. By morphological observation and molecular marker-assisted selection (MAS), in F1, individuals containing the Rfo gene all appeared fertile, while those without it remained male-sterile. The pollen viability of the fertile individuals was measured, and the fertile lines of the six interspecific hybrid combinations were different (40.68-80.49%). Three individuals (containing both Rfo and GOLDEN genes) with the highest pollen vitality (=60%) were backcrossed with fertile cytoplasmic B. rapa, resulting in a total of 800 plants. Based on the MAS, a total of 144 plants with GOLDEN but no Rfo were screened (18%). Moreover, through morphological investigation, one individual with normal cytoplasm, stable fertility but without the restoring gene Rfo, the GOLDEN gene, and morphological characteristics similar to those of B. rapa was obtained. These results increased the diversity of B. rapa germplasm and provided a new method for the utilization of CMS germplasm in Brassica crops.

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