Uncovering structural variation in conifer gigagenomes: evolutionary insights and technical challenges.

Long-read sequencing revealed 5.7 million structural variants in three conifer species, with 97% in non-coding regions and 60% overlapping transposable elements.

• Why it matters: Understanding structural variation in conifers is crucial due to their large, repeat-rich genomes, which have historically hindered comprehensive SV analysis and limited insights into their evolutionary and adaptive processes.
• What they did: Researchers combined long-read and short-read sequencing on 21 individuals, identifying SVs and assessing their functional and evolutionary impacts, including genotyping in 29 additional samples.
• The result: Findings highlight SVs' significant role in genomic diversity, with implications for evolutionary studies, conservation, and breeding, despite challenges in accurately recovering SVs in highly repetitive genomes.