An Alternative to Evolution: many species combination (Introduction)

by David Turell , Friday, September 04, 2020, 15:03 (1539 days ago) @ David Turell

This review article says it is not just bacteria but in some eukaryotes:

https://nyaspubs.onlinelibrary.wiley.com/doi/full/10.1111/nyas.14471

"Abstract
Evolution of eukaryotic species and their genomes has been traditionally understood as a vertical process in which genetic material is transmitted from parents to offspring along a lineage, and in which genetic exchange is restricted within species boundaries. However, mounting evidence from comparative genomics indicates that this paradigm is often violated. Horizontal gene transfer and mating between diverged lineages blur species boundaries and challenge the reconstruction of evolutionary histories of species and their genomes. Nonvertical evolution might be more restricted in eukaryotes than in prokaryotes, yet it is not negligible and can be common in certain groups. Recognition of such processes brings about the need to incorporate this complexity into our models, as well as to conceptually reframe eukaryotic diversity and evolution. Here, I review the recent work from genomics studies that supports the effects of nonvertical modes of evolution including introgression, hybridization, and horizontal gene transfer in different eukaryotic groups. I then discuss emerging patterns and effects, illustrated by specific examples, that support the conclusion that nonvertical processes are often at the root of important evolutionary transitions and adaptations. I will argue that a paradigm shift is needed to naturally accommodate nonvertical processes in eukaryotic evolution."

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"Recent genomic research, has brought reticular evolution to the forefront of eukaryotic genome evolution. Focused studies have shown that reticulated processes can occur between eukaryotic lineages with varying degrees of divergence and reproductive isolation, and that they can be mediated by a variety of mechanisms, ranging from virus‐ or symbiont‐mediated transference of genetic material to the fusion of nuclei from different species. In addition, depending on the mechanism, nonvertical inheritance can involve small fractions of the genome, such as in the HGT of single genes, or larger regions, including complete chromosomal sets, such as in interspecies hybridization. Both HGT and interspecies hybridization are considered potential sources for the acquisition of “transgressive” phenotypic traits in a lineage, and for the origin of new species.5-7 Finally, reticulated evolution can have not only notable ecological and evolutionary consequences for the species involved but also a significant effect on genome evolution.

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"Despite recent progress, however, we still have a very limited understanding of the overall effects of reticulated evolution across eukaryotes. The emerging picture is complex and fragmented, and there is a need to assess global patterns that shed light on what factors modulate nonvertical inheritance across the diversity of eukaryotes. In the discussion below, I survey emerging trends and impacts of nonvertical evolution across eukaryotes and discuss current challenges and opportunities."

Comment: The author then reviews many scattered studies which form the basis for his theory. This is not Darwin's evolution