The complete reference genome for grapevine (Vitis vinifera L.) genetics and breeding
Xiaoya Shi1,2, Shuo Cao2,3, Xu Wang2,4
1College of Horticulture, Qingdao Agricultural University, Qingdao 266109, China.
Horticulture Research
|May 22, 2023
Summary
Scientists created a complete, gap-free grapevine reference genome (PN_T2T) using long-read sequencing. This new genome improves understanding of complex traits and aids grapevine breeding programs.
Area of Science:
- Genomics
- Plant Science
- Bioinformatics
Background:
- Grapevine is a crucial global crop, but previous reference genomes were fragmented.
- These gaps hindered studies on repetitive sequences, centromeres, telomeres, and trait inheritance.
Purpose of the Study:
- To assemble a telomere-to-telomere (T2T) gap-free reference genome for grapevine cultivar PN40024.
- To improve the study of complex agronomic traits and facilitate breeding programs.
Main Methods:
- Utilized PacBio HiFi long reads for genome assembly.
- Incorporated gene annotations from previous versions into the new assembly.
Main Results:
- Assembled a gap-free T2T reference genome (PN_T2T), 69 Mb longer with 9018 more genes than the previous version.
- Annotated 67% of repetitive sequences, 19 centromeres, and 36 telomeres.
- Identified 377 gene clusters linked to traits like aroma and disease resistance, and nine heterozygous hotspots.
Conclusions:
- The complete PN_T2T reference genome is a valuable resource for grapevine genetic research.
- This genome assembly will advance studies on complex traits and support breeding innovations.
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