Re: Re: REB: cycle vs 'summer' genes
iris@hort.net
  • Subject: Re: Re: REB: cycle vs 'summer' genes
  • From: L* M* <l*@lock-net.com>
  • Date: Mon, 05 Dec 2011 09:09:44 -0500
And because it isn't clear, I tend to be skeptical about all explanations. mea culpa.
The latter explanation could apply - even tho one of the cycle seedlings doesn't make a rampant patch of fans trying to take over the garden like some of the sibs do, it may be increasing/growing fast, but not as disease resistant as some of the sibs. 2 steps forward, 1 1/2 back.
And is appealing as a 'simpler' explanation. But (presumably) with fans in all stages of maturity, wouldn't spring bloom tend to be spread out or vary from year to year? Doesn't seem to happen, tho fall bloom doesn't always occur in these two. Heavy in the good grower when it does, but sometimes (i.e., this year) none. And it did not fall bloom for the Spoons.
On the other hand, IMM seems to be odd here compared to the other rebloomers I've tried to use for breeding, I keep wondering if it's operating with a fully 'balanced' set of chromosomes. It may just be the chronic poor growing conditions here (weather), but seed set and (esp) germination seems low in the majority of IMM crosses, & it's anthers are definitely more sensitive to weather than, for example, HoM, MATRIX, RENOWN, VIOLET MIRACLE, TEA LEAVES.
CSONG seeds were an exception. So was CHINA MOON (2010 cross, so too soon to say if any of those will rebloom - one maiden fall bloom this year) cross. Guess I should look up the numbers before saying germination is lower for sure, but that's my impression. Simplest explanation may be it's just not happy enough here to produce a lot of viable seeds.
Abundant seed 2011 in backcrosses with CSONG children (just to see if that works well to recapture rebloom - not expecting much in the way of looks). 

On 12/4/2011 3:38 PM, Chuck Chapman wrote:

What you have with Immortality X Celebration song is not clear. Could be
a gene recombination of the two genes needed for FC rebloom. That is
absence of vernalization genes plus absence of daylight dormancy gene.
Combined, one from one parent , other from other parent. FB X
Celebration Song = all oncers, but strong growth. Or could be  extended
season rebloom. That is  plant reaches maturity early and then has five
months of growth, triggering "false Spring" trigger.


Always appreciate your thoughts on these (apparent) mysteries, Chuck.

Linda Mann east TN USA zone 7

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