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
作者： Wang, Zhi Wei 1 ; Wang, Chuan 1 ; Gao, Lei 1 ; Mei, Shi Yong 3 ; Zhou, Yuan 1 ; Xiang, Chang Ping 4 ; Wang, Ting 1 ;
作者机构： 1.Chinese Acad Sci, CAS Key Lab Plant Germplasm Enhancement & Special, Wuhan Bot Garden, Wuhan 430074, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
3.Hubei Acad Agr Sci, Wuhan 430064, Peoples R China
4.Huazhong Agr Univ, Key Lab, Minist Educ Hort Plant Biol, Wuhan 430070, Peoples R China
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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