1. A nonS-locus F-box gene breaks self-incompatibility in diploid potatoes
- Author
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Qinggang Liao, Fei Tang, Huiqin Yang, Chunzhi Zhang, Han Guo, Sanwen Huang, William J. Lucas, Canhui Li, Ling Ma, Yuxin Jia, Zhen Peng, Bo Zhang, Dongli Gao, Yi Shang, Jinzhe Zhang, Die Tang, Xuming Luo, Futing Li, and Meng Gao
- Subjects
0106 biological sciences ,0301 basic medicine ,Plant genetics ,Breeding program ,Science ,General Physics and Astronomy ,Genetically Modified ,Locus (genetics) ,Flowers ,Biology ,Genes, Plant ,01 natural sciences ,Article ,Plant breeding ,General Biochemistry, Genetics and Molecular Biology ,Self incompatability ,03 medical and health sciences ,Ribonucleases ,Inbred strain ,Mating ,Allele ,Gene ,Phylogeny ,Plant Proteins ,Solanum tuberosum ,Genetics ,Multidisciplinary ,F-Box Proteins ,fungi ,Self-Incompatibility in Flowering Plants ,food and beverages ,Plant ,General Chemistry ,Plants ,Plants, Genetically Modified ,Diploidy ,Plant Breeding ,030104 developmental biology ,Genes ,Seeds ,Ploidy ,Biotechnology ,010606 plant biology & botany - Abstract
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., Diploid potatoes are typically self-incompatible, complicating efforts to breed diploid cultivars. Here the authors report map-based cloning of the S-locus inhibitor (Sli) gene in potato which encodes a non S-locus F-box protein that is expressed in pollen and can functions like a general S-RNase inhibitor to overcome self-incompatibility.
- Published
- 2021