Highlight: The Colorful History of Plastids

McGrath, Casey

doi:10.1093/gbe/evaa116

Cited by 3 publications

(2 citation statements)

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“…The first signals from Diaphoretickes to Viridiplanteae (ps8-ps10, Fig. 9 ) reflect the phylogenetic distribution of plastids that were independently acquired by different lineages that branch within Diaphoretickes 64 , 65 . In these situations where a feature (e.g., plastids) was acquired more than once through horizontal transfer, our methodology, which is based on Dollo’s parsimony, is not able to establish the exact origin of that particular feature.…”

Section: Resultsmentioning

confidence: 99%

Macroevolutionary dynamics of gene family gain and loss along multicellular eukaryotic lineages

Domazet-Lošo,

Široki,

Šimičević

et al. 2024

Nat Commun

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The gain and loss of genes fluctuate over evolutionary time in major eukaryotic clades. However, the full profile of these macroevolutionary trajectories is still missing. To give a more inclusive view on the changes in genome complexity across the tree of life, here we recovered the evolutionary dynamics of gene family gain and loss ranging from the ancestor of cellular organisms to 352 eukaryotic species. We show that in all considered lineages the gene family content follows a common evolutionary pattern, where the number of gene families reaches the highest value at a major evolutionary and ecological transition, and then gradually decreases towards extant organisms. This supports theoretical predictions and suggests that the genome complexity is often decoupled from commonly perceived organismal complexity. We conclude that simplification by gene family loss is a dominant force in Phanerozoic genomes of various lineages, probably underpinned by intense ecological specializations and functional outsourcing.

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Section: Resultsmentioning

confidence: 99%

Macroevolutionary dynamics of gene family gain and loss along multicellular eukaryotic lineages

Domazet-Lošo,

Široki,

Šimičević

et al. 2024

Nat Commun

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“…The signal at Diaphoretickes (ps8, Fig. 11) reflects the phylogenetic distribution of plastids gained through secondary endosymbiosis (McGrath 2020), while signals in later periods suggest continuous and intensive coevolution of plastids and host cells in green algae (Viridiplanteae-Streptophyta ps9-ps10, Fig. 11) and along diversification of land plants (Embriophyta-Eurosids, ps11-ps19, Fig.…”

Section: Resultsmentioning

confidence: 99%

Macroevolutionary dynamics of gene family gain and loss along multicellular eukaryotic lineages

Domazet-Lošo

Široki

Domazet-Lošo

2022

Preprint

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The recent analyses in animals show that gene gain and loss fluctuate during evolutionary time. However, these studies lack the full profile of macroevolutionary trajectories as they do not consider other eukaryotic lineages and deeper evolutionary periods that go back to the origin of cellular organisms. To give a more inclusive view on the macroevolutionary patterns of genome complexity across the tree of life, we here recovered the evolutionary dynamics of gene family gain and loss ranging from the ancestor of cellular organisms to four focal species that represent animal, plant, and fungal diversity. We show that in all considered lineages the gene family content follows a common evolutionary pattern, where the number of gene families reaches the highest value at a major evolutionary and ecological transition, and then gradually decreases towards extant organisms. This pattern suggests that the genome complexity, approximated by the number of residing gene families, does not continuously increase through evolutionary time. We conclude that simplification by gene family loss is a dominant force in Phanerozoic genomes of various lineages, probably underpinned by intense ecological specializations and functional outsourcing. These findings support current theoretical predictions on the macroevolutionary change in genome complexity.

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