A nonS-locus F-box gene breaks self-incompatibility in diploid potatoes

作者：Ling Ma, Chunzhi Zhang, Bo Zhang, Fei Tang, Futing Li, Qinggang Liao, Dié Tang, Zhen Peng, Yuxin Jia, Meng Gao, Han Guo, Jinzhe Zhang, Xuming Luo, Huiqin Yang, Dongli Gao, William J. Lucas, Canhui Li, Sanwen Huang, Yi Shang · 发表于：Nature Communications · 年份：2021 · DOI：10.1038/s41467-021-24266-7 · 被引用次数：99 · 研究领域：Plant Reproductive Biology、Plant Pathogens and Resistance、Plant Virus Research Studies

Potato is the third most important staple food crop. To address challenges associated with global food security, a hybrid potato breeding system, aimed at converting potato from a tuber-propagated tetraploid crop into a seed-propagated diploid crop through crossing inbred lines, is under development. However, given that most diploid potatoes are self-incompatible, this represents a major obstacle which needs to be addressed in order to develop inbred lines. Here, we report on a self-compatible diploid potato, RH89-039-16 (RH), which can efficiently induce a mating transition from self-incompatibility to self-compatibility, when crossed to self-incompatible lines. We identify the S-locusinhibitor (Sli) gene in RH, capable of interacting with multiple allelic variants of the pistil-specific S-ribonucleases (S-RNases). Further, Sli gene functions like a general S-RNase inhibitor, to impart SC to RH and other self-incompatible potatoes. Discovery of Sli now offers a path forward for the diploid hybrid breeding program.