Work

A fully phased octoploid strawberry genome reveals the evolutionary dynamism of centromeric satellites

Year: 2025

Type: article

Abstract: We systematically examine the application of different phasing strategies to decrypt strawberry genome organization and produce a fully phased and accurate reference genome for Fragaria x ananassa cv. "EA78" (2n = 8x = 56). We identify 147 bp canonical centromeric repeats across 50 strawberry chromosomes and uncover the formation of six neocentromeres through centromere turnover. Our findings indicate strawberry genomes have diverged centromeric satellite arrays among chromosomes, particularly across homoeologs, while maintaining high sequence similarity between homologs. We trace the evolutionary dynamics of centromeric repeats and find substantial centromere size expansion in wild and cultivated octoploids compared to the diploid ancestor, F. vesca.

Source: Genome biology

DOI: 10.1186/s13059-025-03482-0

Authors: Xin Jin, Haiyuan Du, Maoxian Chen, Xu Zheng, Yiying He, Andan Zhu

Institutions: Kunming Institute of Botany, Chinese Academy of Sciences, University of Chinese Academy of Sciences

Language: English

Topic: Chromosomal and Genetic Variations

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

Open Access status: gold

Estimated APC paid: $5,490

Funder: National Natural Science Foundation of China