Caesar's Ghost genetics etc.
- Subject: [sibrob] Caesar's Ghost genetics etc.
- From: Ken Walkup k*@cornell.edu
- Date: Tue, 20 Dec 2005 07:53:41 -0500
Chuck, Jim, & everyone,
Caesar's Ghost would most likely be a white selection of I sibirica (I've
never seen it); the description sure sounds like it. Modern Siberian hybs
represent mostly I. sanguinea. These two species have different genes for
anthocyanin production. When you cross them, you don't get the recessives
you need to have white offspring in the F1 generation.
Jim: your purple must have had one copy of the dominant allele for
anthocyanin, and one recessive. The white one had two recessives. So you
probably got about 25% seedlings with purple or blue coloration. The
others would have been mostly whites, but when the anthocyanin pathway is
switched off, it allows you to see what other pigments might have been
lurking there, masked by the purple. Yellows and reds are possible.
The article mentioned should be obtainable in the back issues of TSI which
are available from Judy Hollingworth, 124 E. Sherwood Rd., Williamston, MI,
48895. You can get single issues for $1.50.
Ken
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