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Evolution of complex genome architecture in gymnosperms
Tao Wan1,2,3, Yanbing Gong4,5, Zhiming Liu3
1Core Botanical Gardens/Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China.
Gigascience
|August 10, 2022
Summary
Gymnosperm genomes, though challenging due to large sizes, are increasingly available. This study reviews current resources, highlighting insights into genome evolution, repetitive sequences, and paleopolyploidy in these ancient seed plants.
Area of Science:
- Evolutionary Biology
- Genomics
- Paleobotany
Background:
- Gymnosperms are an ancient plant lineage with a complex evolutionary history, marked by radiations and extinctions.
- Their ultra-large genomes have historically hindered whole-genome assembly, with significant progress only in the last decade.
- Current research is expanding taxonomic representation in gymnosperm genome assemblies.
Purpose of the Study:
- To provide an overview of publicly available gymnosperm genome resources.
- To discuss the assembly quality and findings related to large genome architectures in gymnosperms.
- To identify key genomic features influencing whole-genome changes and evolutionary dynamics.
Main Methods:
- Review of publicly available gymnosperm genome assembly data.
- Analysis of genomic features, including repetitive sequences, paleopolyploidy, and intron lengths.
- Comparative analysis of genome architectures and evolutionary patterns.
Main Results:
- An overview of current gymnosperm genome resources and their assembly quality.
- Identification of genomic features linked to whole-genome changes.
- New insights into repetitive sequence dynamics, paleopolyploidy, and long introns in gymnosperms.
Conclusions:
- Further exploration of medium-sized (5-15 gigabase) gymnosperm genomes is recommended.
- Comparative analyses of high-quality assemblies are crucial for understanding genomic shifts and early seed plant diversification.
- Continued research on gymnosperm genomes will illuminate the evolution of seed plants.
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