Heterozygous alleles restore male fertility to cytoplasmic male-sterile radish (Raphanus sativus L.): a case of overdominance
文献类型: 外文期刊
第一作者: Wang, Zhi Wei
作者: Wang, Zhi Wei;Wang, Chuan;Gao, Lei;Zhou, Yuan;Wang, Ting;Wang, Chuan;Mei, Shi Yong;Xiang, Chang Ping
作者机构:
关键词: Cytoplasmic male sterility;fertility restoration;heterozygous alleles;overdominance;radish
期刊名称:JOURNAL OF EXPERIMENTAL BOTANY ( 影响因子:6.992; 五年影响因子:7.86 )
ISSN: 0022-0957
年卷期: 2013 年 64 卷 7 期
页码:
收录情况: SCI
摘要: The practice of hybridization has greatly contributed to the increase in crop productivity. A major component that exploits heterosis in crops is the cytoplasmic male sterility (CMS)/nucleus-controlled fertility restoration (Rf) system. Through positional cloning, it is shown that heterozygous alleles (RsRf3-1/RsRf3-2) encoding pentatricopeptide repeat (PPR) proteins are responsible for restoring fertility to cytoplasmic male-sterile radish (Raphanus sativus L.). Furthermore, it was found that heterozygous alleles (RsRf3-1/RsRf3-2) show higher expression and RNA polymerase II occupancy in the CMS cytoplasmic background compared with their homozygous alleles (RsRf3-1/RsRf3-1 or RsRf3-2/RsRf3-2). These data provide new insights into the molecular mechanism of fertility restoration to cytoplasmic male-sterile plants and illustrate a case of overdominance.
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