玉米 C 组细胞质雄性不育育性恢复的遗传学研究。
Genetics of fertility restoration in the C-group of cytoplasmic male sterility in maize.
机构信息
Department of Plant Breeding, Cornell University, Ithaca, N.Y. 14853.
出版信息
Genetics. 1981 Jun;98(2):379-88. doi: 10.1093/genetics/98.2.379.
The genetics of fertility restoration of cms-C group cytoplasm of maize was studied using crosses involving stable maintainer lines and lines that restored full pollen fertility. Pollen fertility in the sources of cms-C sterile cytoplasms studied was restored by a single dominant restorer (Rf4) gene. The fertility restoration was sporophytic. Allelism tests among five restorer lines showed that they all apparently carried the same alleles (Rf4 Rf4). Similar tests also demonstrated that seven nonrestoring maintainer lines had apparently the same genotype (rf4 rf4), although a partial "late break" of fertility was observed at low levels in some maintainer crosses. Comparative studies among different cms-C sources (C, Bb, ES, PR and RB) indicated that similar inheritance of fertility restoration was involved. The data indicated that a single, dominant Rf gene is involved in the restoration of several C-group cytoplasms, at least in the lines studied here. This is the first single-gene, sporophytic restorer system described in maize to date.
利用涉及稳定保持系和恢复完全花粉育性的系的杂交，研究了玉米 CMS-C 组细胞质育性恢复的遗传学。研究的 CMS-C 不育细胞质源的花粉育性由单个显性恢复基因（Rf4）恢复。育性恢复是孢子体的。对 5 个恢复系的等位基因测试表明，它们显然都携带相同的等位基因（Rf4 Rf4）。类似的测试还表明，7 个非恢复保持系显然具有相同的基因型（rf4 rf4），尽管在一些保持系杂交中观察到低水平的部分“后期突破”育性。对不同 CMS-C 来源（C、Bb、ES、PR 和 RB）的比较研究表明，涉及类似的育性恢复遗传。数据表明，一个单一的显性 Rf 基因参与了几个 C 组细胞质的恢复，至少在本研究中涉及的系中是如此。这是迄今为止在玉米中描述的第一个单基因、孢子体恢复系统。
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