HYB: Cytoplasmic Inheritance
- Subject: HYB: Cytoplasmic Inheritance
- From: S* M* <7*@compuserve.com>
- Date: Thu, 12 Nov 1998 15:30:01 -0500
- Content-Disposition: inline
From: Sharon McAllister <73372.1745@compuserve.com>
Anner Whitehead wrote:
> So is the idea to backbreed to approach the species or close enough to
confirm
> inheritance?
Yes and no <G>. It all started with the old goal of putting an aril-like
flower on a TB-like plant and my desire to understand why it hadn't been
achieved and whether there were other experiments that could be tried.
This led to the subject of cytoplasmic inheritance, which has turned out to
have some very practical applications. Observations of some of those lines
led me to explore the possibility that some traits carried within the
chromosomes can actually be expressed only in the presence of enabling
genes that are carried in the cytoplasm. Testing that theory requires a
pod parent with known cytoplasm and a pollen parent descended from the same
species. Probably more than you really wanted to know....
> And how do you deal with the fact that a species is variable from
> one individual in a population to another? I don't mean growing
conditions. Is
> all this inconsequential?
Although species include many diverse individuals, they also have some
common traits. The flowers of I. iberica, for example, vary in color and
pattern, size and shape -- but the cupped falls are a distinguishing
characteristic. Those are the traits I've been working with.
> How far down are you ultimately going to go in this
> analysis? I mean ar we talking individual genes here?
I don't know that I'll be able to take it any further and seriously doubt
anyone else will pick up where I've left off. But we're talking about
interacting genes, not individual ones.
Sharon McAllister
73372.1745@compuserve.com
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