[Avodah] Are genetically modified organisms (GMO's) kosher?

[Micha Berger via Avodah]

On Tue, Jul 05, 2016 at 04:22:32PM +0000, Professor L. Levine via Avodah wrote:
: The following is from the OU Kosher Halacha Yomis
...
:... However, Rav Belsky, zt"l ruled that GMO's are kosher. He explained
: that the prohibition of kilayim only refers to the specific actions
: that the Torah or Chazal forbade. Other forms of mixing species such as
: splicing genes are permitted. As another example, one is permitted to
: plant a fruit tree of one species next to a tree from another species,
: even though the trees will cross-pollinate.

Does this position on GMOs therefore qualify as hora'ah, or is it zil q'ri
bei rav?

:                                             Although Ramban (Bereishis
: 1:11) explains the reason for the issur of kelayim is that by mixing
: species one is contradicting the command that Hashem gave for every
: species to be created "l'mineiyhu" (to its own kind), and one might
: conclude that it is forbidden to mix and create new species, nonetheless
...

Wouldn't making a pesaq based on this Ramban be invalid because ein
darshinan ta'amei hamiqra? IOW, is the "one" who "might conclude"
a poseiq?

Tir'u baTov!
-Micha

-- 
Micha Berger             The greatest discovery of all time is that
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