Re: HYB: another terminology question
iris@hort.net
  • Subject: Re: HYB: another terminology question
  • From: C* C* <i*@aim.com>
  • Date: Fri, 22 Feb 2013 11:40:23 -0500 (EST)
sibling (full) is same two parents. Reciprocal cross are also full siblings. But when you are getting picky, reciprocal crosses will have different plastid and mitochondria genetics. 

Chuck Chapman

-----Original Message-----
From: Tom Waters <irises@telp.com>
To: iris <iris@hort.net>
Sent: Fri, Feb 22, 2013 10:12 am
Subject: [iris] HYB: another terminology question

While we're at it, I'm interested in how people understand the term
"sibling". I've seen it sometimes apparently restricted to two irises that came from the same pod of seed, or at least the product of the cross of two plants made by the same hybridizer in the same year. It seems to me that since the two parents are clones, any irises with the same parentage are siblings, even if the crosses that produced them were made many years or miles apart by different people. My own brother and sisters, for example, are no less my brother and sisters for having been gestated separately at 
different times. ;)




Tom Waters


Telperion Oasis ~ www.telp.com/irises


Cuyamungue, New Mexico, USA (zone 6)

----------------------------------------
From: "Tom Waters" <irises@telp.com>
Sent: Friday, February 22, 2013 7:22 AM
To: iris@hort.net
Subject: re: [iris] HYB: trying to learn some genetics terminology

Yes, as Chuck has said F2 refers only to the result of crossing F1
individuals from the same initial cross. I don't believe there is any
special terminology for the cross of two seedlings of related but not
identical parentage.

Tom Waters

Telperion Oasis ~ www.telp.com/irises

Cuyamungue, New Mexico, USA (zone 6)

----------------------------------------
From: "Linda Mann"
Sent: Thursday, February 21, 2013 7:16 PM
To: iris@hort.net
Subject: [iris] HYB: trying to learn some genetics terminology

F1 & subsequent generations.

Online definition says F2 is > The progeny of self-pollinated F1
generation plants

But I've also heard/read F2 used this way:
The F2 (second filial) generation consists of the offspring from 
allowing

the F1 individuals to interbreed - the grandchildren of the parental
generation.
So what do I call the offspring of two related F1 seedlings that are not 
siblings, but are part of my non-line breeding program?  i.e., crosses
between half sibs, cousins, etc.
I was assuming that any 2nd generation away from the parental one was an 
F2, but looks like that's not the way F2 is normally used.

Linda Mann

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