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Genetic diversity of the self-incompatibility locus in diploid potato

文献类型： 外文期刊

作者： Jing, Xinyu 1 ; Qian, Duoduo 2 ; Jiang, Xiuhan 2 ; Wang, Pei 2 ; Bao, Huihui 4 ; Li, Dianjue 4 ; Zhu, Yanhui 2 ; Zhu, Guangtao 4 ; Zhang, Chunzhi 2 ;

作者机构： 1.Huazhong Agr Univ, Natl Key Lab Crop Genet Improvement, Wuhan 430070, Peoples R China

2.Chinese Acad Agr Sci, Agr Genom Inst Shenzhen, Minist Agr & Rural Affairs, Shenzhen Branch,Guangdong Lab Lingnan Modern Agr,K, Shenzhen 518120, Peoples R China

3.Henan Univ, Sch Life Sci, State Key Lab Crop Stress Adaptat & Improvement, Kaifeng 475004, Peoples R China

4.Yunnan Normal Univ, AGISCAAS YNNU Joint Acad Potato Sci, Yunnan Key Lab Potato Biol, Kunming 650000, Peoples R China

关键词： potato; self-incompatibility; S-RNase; SLF

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：4.4； 五年影响因子：4.8 ）

ISSN： 2095-3119

年卷期： 2025 年 24 卷 4 期

页码：

收录情况： SCI

摘要： Re-domestication of diploid potato (Solanum tuberosum) into a seed crop is an innovative breeding method to accelerate genetic improvement. Seed propagation would allow hybrid production and mix superior alleles. However, almost all diploid potatoes in nature are self-incompatible (SI). Gametophytic self-incompatible (GSI) is a widespread SI in Solanaceae and is controlled by the S locus that contains a ribonuclease (S-RNase) and multiple F-box (SLFs); however, the genetic diversity of the S locus in potato is unclear. This study identified 21 S-RNase alleles involved in SI from 194 diploid potato accessions by large-scale transcriptome sequencing. The levels of amino acid similarity among different S-RNase proteins varied from 31.3 to 95.8%. S2 allele is the most widespread in 194 diploid potatoes and is mainly distributed in the S. tuberosum Group Phureja. Based on genomic annotation encoding F-box proteins in the S2 locus on a genomic region of approximately 13 Mb. Comparative genomics analysis showed that eight SLF genes are relatively conserved among four homozygous S locus. The Ka and Ks analysis suggested that S-RNase and intra-haplotypic SLF genes have co-evolved. These findings help select suitable pollinators, combine more hybrid combinations, and fully use heterosis to accelerate diploid potato breeding.

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