[Avodah] etrog genetics

[saul newman via Avodah]

On Mon, Feb 13, 2017 at 3:05 AM, Micha Berger <micha at aishdas.org> wrote:
> On Sun, Feb 12, 2017 at 08:06:56PM -0800, saul newman via Avodah wrote:
>: http://hortsci.ashspublications.org/content/40/7/1963.full.pdf+html
>: all analyzed species were at  least 95% related, whether moroc , yemen,
>: calabria, or israel...

> Since grafting doesn't change the genetics of the fruit seeds, this is
> measuring cross-breeding more than eliminating murkav altogether.
...
> But what does "95% related" mean?

> They say that out of 190 genetic fragments, 160 were monomorphic,
> while 30 showed polymorphism...

https://en.wikipedia.org/wiki/Polymorphism_(biology)    it would seem these
are like ABO blood types, a factor that doesnt make a new species, but
shows a certain degree of relation.  i think given there that there were 3
original species that all citrus descended from, if those bands [pomelo eg]
dont show up, then there is no pomelo source.   am not sure how grafting
might change the genes found in the fruit , ie what does rootstock have to
do with genes in the fruits themeselves