Genetics (Take ][)
Richard W. Kerrigan
rwk at sylvanres.com
Thu Oct 10 07:34:22 EST 1996
(Briefly:) Empirically, some higher fungi exhibit inbreeding problems
following one or more generations of sib-spore matings, while other tend
not to. Remember, there are successful haploid and/or homothallic fungi
that are analagous to highly inbred strains. Finally, yes, cloning works;
it is the actual method used most often in mushroom culture. -- Rick
Thailine Matar (thailine at ix.netcom.com) wrote:
: I posed this question regarding mycological genetics once before
: and I wasn't very clear. Mushrooms grown *in a closed environment*
: using spore prints from one generation to create the mycelium of the
: next sounds, to me, like inbreeding. Genetic diversity doesn't seem to
: be met and, over several generations, it seems the fungi should develop
: problems (failure to germinate comes most readily to mind). In nature,
: this problem doesn't exist since spores germinate with spores from "far
: away" colonies (yes, I realize it probably isn't all that far away).
: This question involves the closed environment condition *not* the
: natural/open condition.
: Am I mistaken because fungi are "simple enough" organism not to
: run into this problem. If I am not mistaken, is there a method, other
: than spores from an outside source, that alleviates the problem?
: One solution I've considered involves cloning. I have no idea if
: this solution is applicable to fungi but it works well with plants
: (pulling from my botanical knowledge). From my understanding,
: mushrooms start as spores, germinate into hyphae/mycelium, enter into
: their fruiting stage which ends with spore creation. Could a section
: of the mycelium be transferred from a fruiting colony into a
: nutrient-rich environment and begin to generate new mycelium which
: would later enter into another fruiting cycle. Genetic diversity
: doesn't exist since these new colonies are nothing more than duplicates
: of the older colony but at least you don't get any problems
: with nasty recessives rearing their ugly heads.
: There. I think that's clearer.
Richard W. Kerrigan, Research Department, Sylvan Spawn Laboratory, Inc.
1163 Winfield Rd., Cabot, PA 16032 USA
e-mail: rwk at sylvanres.com phone: 412-352-1521 fax: 412-352-4062
"Success has a thousand parents; failure is an orphan"
More information about the Mycology