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Article|19 Apr 2023|OPEN
Genomic features of meiotic crossovers in diploid potato
Xiuhan Jiang1,2 , Dawei Li2 , Hui Du2 , Pei Wang2 , Liang Guo1 and Guangtao Zhu3 , Chunzhi Zhang,1,2 ,
1National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
2Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, Guangdong 518120, China
3The AGISCAAS-YNNU Joint Academy of Potato Sciences, Yunnan Normal University, Kunming, Yunnan 650500, China
*Corresponding author. E-mail:

Horticulture Research 10,
Article number: uhad079 (2023)
Views: 147

Received: 19 Dec 2022
Accepted: 13 Apr 2023
Published online: 19 Apr 2023


Meiotic recombination plays an important role in genome evolution and crop improvement. Potato (Solanum tuberosum L.) is the most important tuber crop in the world, but research about meiotic recombination in potato is limited. Here, we resequenced 2163 F2 clones derived from five different genetic backgrounds and identified 41 945 meiotic crossovers. Some recombination suppression in euchromatin regions was associated with large structural variants. We also detected five shared crossover hotspots. The number of crossovers in each F2 individual from the accession Upotato 1 varied from 9 to 27, with an average of 15.5, 78.25% of which were mapped within 5 kb of their presumed location. We show that 57.1% of the crossovers occurred in gene regions, with poly-A/T, poly-AG, AT-rich, and CCN repeats enriched in the crossover intervals. The recombination rate is positively related with gene density, SNP density, Class II transposon, and negatively related with GC density, repeat sequence density and Class I transposon. This study deepens our understanding of meiotic crossovers in potato and provides useful information for diploid potato breeding.