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- W4376126989 abstract "Abstract Background As an important source of genetic variation, copy number variation (CNV) can alter the dosage of DNA segments, which in turn may affect gene expression level and phenotype. However, our knowledge of CNV in apple is still limited. Here, we obtained high-confidence CNVs and investigated their functional impact based on genome resequencing data of two apple populations, cultivars and wild relatives. Results In this study, we identified 914,610 CNVs comprising 14,839 CNV regions (CNVRs) from 346 apple accessions, including 289 cultivars and 57 wild relatives. CNVRs summed to 71.19 Mb, accounting for 10.03% of the apple genome. Under the low linkage disequilibrium (LD) with nearby SNPs, they could also accurately reflect the population structure of apple independent of SNPs. Furthermore, A total of 3,621 genes were covered by CNVRs and functionally involved in biological processes such as defense response, reproduction and metabolic processes. In addition, the population differentiation index ( $${V}_{st}$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:msub> <mml:mi>V</mml:mi> <mml:mrow> <mml:mi>st</mml:mi> </mml:mrow> </mml:msub> </mml:math> ) analysis between cultivars and wild relatives revealed 127 CN-differentiated genes, which may contribute to trait differences in these two populations. Conclusions This study was based on identification of CNVs from 346 diverse apple accessions, which to our knowledge was the largest dataset for CNV analysis in apple. Our work presented the first comprehensive CNV map and provided valuable resources for understanding genomic variations in apple." @default.
- W4376126989 created "2023-05-12" @default.
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- W4376126989 date "2023-05-11" @default.
- W4376126989 modified "2023-10-18" @default.
- W4376126989 title "A comprehensive analysis of copy number variations in diverse apple populations" @default.
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- W4376126989 doi "https://doi.org/10.1186/s12864-023-09347-9" @default.
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