Taxacom: article request (mtDNA and phylogeny)

[John Grehan]

I now have a copy! Thanks. John

On Thu, Jan 27, 2022 at 11:06 AM John Grehan via Taxacom <
taxacom at lists.ku.edu> wrote:

> Can anyone access the following (and see abstract below for general
> interest)
>
> Schwartz, J. H. 2021. Evolution, systematics, and the unnatural history of
> mitochondrial DNA. Mitochondrial DNA Part A 32: 126-151,.
>
> Abstract
> The tenets underlying the use of mtDNA in phylogenetic and systematic
> analyses are strict maternal inheritance, clonality, homoplasmy, and
> difference due to mutation: that is, there are species-specific mtDNA
> sequences and phylogenetic reconstruction is a matter of comparing these
> sequences and inferring closeness of relatedness from the degree of
> sequence similarity. Yet, how mtDNA behavior became so defined is
> mysterious. Even though early studies of fertilization demonstrated for
> most animals that not only the head, but the sperm’s tail and
> mitochondria-bearing midpiece penetrate the egg, the opposite – only the
> head enters the egg – became fact, and mtDNA conceived as maternally
> transmitted. When midpiece/tail penetration was realized as true, the
> conceptions ‘strict maternal inheritance’, etc., and their application to
> evolutionary endeavors, did not change. Yet there is mounting evidence of
> paternal mtDNA transmission, paternal and maternal combination,
> intracellular recombination, and intra- and intercellular heteroplasmy.
> Clearly, these phenomena impact the systematic and phylogenetic analysis of
> mtDNA sequences.
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