Re: HYB: aphylla germination
- To: i*@onelist.com
- Subject: Re: HYB: aphylla germination
- From: T* T* L* <t*@rt66.com>
- Date: Fri, 31 Jul 1998 17:36:37 -0600
From: Tom Tadfor Little <telp@rt66.com>
>
>Thanks Stephanie. I did some TB X 48 chr. MTB crosses this year and was
>curious to know how many crosses I could plant since room to grow
>seedlings is very limited. Sounds like these type crosses have a very
>low first year germination rate compared to TB X TB crosses. The Craigs
>think germination should be pretty good. I would like more than just
>10-25% germination in the first year because like everyone else in the
>whole world......I HATE waiting!!! Perhaps I will try knicking the
>seeds, soaking, refrigerating the seeds to up my percentage of
>germinations.
Be careful. I believe that Stephanie Markham and Vicki Craig were talking
about two different types of crosses. If you cross an advanced-generation
48-chromosome median (such as one of the Craigs' or one of Hagers) with a
TB, you should not have any reduction in germination rate. If you use Iris
aphylla itself instead, then you may expect some difficulties.
Even when two species have the same number of chromosomes, they often do
not interbreed with quite the facility as members of the same species. The
modern TBs/BBs are essentially an artifical species. Iris aphylla, although
compatible, is still a different species. The modern 48-chromosome medians
are many generations away from aphylla; they are essentially part of the TB
"pseudo-species" now.
Happy irising, Tom
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Tom Tadfor Little telp@Rt66.com
Santa Fe, New Mexico, USA
Telperion Productions http://www.rt66.com/~telp/
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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