Type Crosses for '04

Earlier (in message #600) I had suggested:
 
"...for this first year of SAGE...to think in terms of TYPE of cross, as we are not going to have the same
varieties among us from which to work. Cross types such as the following may reveal much initially:

1) ANY SA X Schreiner blue-line or black-line varieties, none of which have much if any Sass-line ancestry...."
Subsequent information from the Suttons has not supported what I supposed might be true, especially considering the high percentage yield of flounced seedlings from YAQUINA BLUE..  The intent is to look for "...crosses of the various types [that] may [offer] significant evidence about recessives from Sass-line origins--".  Recently Mike Sutton has mentioned that these varieties stand out in his memory as giving few if any SA's when crossed with them: DOUBLE BUBBLE, BLACKOUT, QUITO and DYNAMITE.  I don't recognize any obvious commonality among these, but I'm digging.  They may just be segregates from various lines.  The important thing is, we have identified, in addition to PURPLE PIROUTTE, some varieties that do *not* breed SA's or, at least, not many of them.  What we observe in such crosses may be especially important.
 
The second type of cross suggested was "2) SA's x lines heavy to Sass ancestry including any plicata or pink,"  the type cross suggested as having the highest yield of SA offspring.  SPIRIT WORLD has been identified as one from which a SA break has come, and it does also show the ledge or shelf Sharon McAllister suggested as pointing to varieties likely to be productive of SA's.  Most pinks and plicatas are likely to be of this type or close to it. Many pinks may carry the ledge.  We won't know until our southern tier of states begins having bloom.
 
"3) Crosses between SA's."  These crosses, if we have recessives involved, will tend to concentrate them.  We can also expect a significant number of plants whose basic growth or flowering behavior is disturbed, which *may* be the result of accumulating recessives of the type we are looking for, and, on the other had, may *not* be.  This is significant data also. Different crosses may give widely different results.  This, too, is of interest and significance.

The suggestion that "By separating out ... horned, spooned and flounced [etc] in [the progenies from] each of the above three types of crosses, the numbers may suggest something about whether we are looking at dosage effects" seems likely still to have importance.
 
From the consensus data emerging it looks like it may be possible to select a few SA's to which many, but not all, of us will have or have access this coming bloom season.  It is not a realistic expectation for '04 that we will have any large numbers of seeds from ony one, two or three crosses.  The more we can approach this as a goal, however, the better and give us a head start on crosses in 2005.
 
More "just thinking."
 
Neil Mogensen   z 7 western NC

 
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