Re: HYB:recessives

Thanks, so much, Matt!  This came up in a discussion about red bearded whites!
I'm still looking for CHRISTMAS RUBIES in rebloom.  In fact, I'd be happy if
CR would just live here.  You've triggered thoughts of some things I read
years ago.

<<If you want these two genes to not inherit as a pair in your breeding
program, you'll just have to make more crosses (and grow more seedlings) than
usual...>>
More crosses and more seedlings?  Oh, my aching knees!  <smile>

Thanks again . . .

Betty Wilkerson
Bridge In Time Iris
KY Zone 6



-----Original Message-----
From: Matthew Booker <apetala2@yahoo.com>
To: iris@hort.net
Sent: Sat, Nov 7, 2009 6:22 pm
Subject: Re: [iris] HYB:recessives


Hi Betty,

It is possible for two different genes to be "linked". Usually, 2 separate
genes (and thus two separate traits) will sort independently in a plant's
progeny.

However, if two genes are on the same chromosome *and* really close together
on that chromosome, then they will not sort independently. There will be a
preference for the two genes to enter the child generation together. How
strong this preference is depends on how close they are in the chromosome. The
closer, the more likely they'll be inherited as a pair.

That said, even if two genes are immediately adjacent, there's always a chance
that they'll separate (due to what's called "crossing-over"). If you want
these two genes to not inherit as a pair in your breeding program, you'll just
have to make more crosses (and grow more seedlings) than usual...

-Matt
Melrose, MA
Zone 6

On Nov 7, 2009, at 7:11 PM, autmirislvr@aol.com wrote:

> Talking about recessive . . .
>
> Something came up in conversation (off list) the other day and I'd > like to
> pose a question to the list.
>
> Are recessives sometimes coupled together? Or linked? If a plant > has a
> characteristic that is recessive, will it also have other recessive >
traits?
> Automatically?
>
>
>
> Thanks,
>
> Betty Wilkerson
> Bridge In Time Irises
> KY Zone 6
>
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