hort.net Seasonal photo, (c) 2006 Christopher P. Lindsey, All Rights Reserved: do not copy
articles | gallery of plants | blog | tech blog | plant profiles | patents | mailing lists | top stories | links | shorturl service | tom clothier's archive0
Gallery of Plants
Tech Blog
Plant Profiles
Mailing Lists
    Search ALL lists
    Search help
    Subscription info
Top Stories
sHORTurl service
Tom Clothier's Archive
 Top Stories
New Trillium species discovered

Disease could hit Britain's trees hard

Ten of the best snowdrop cultivars

Plant protein database helps identify plant gene functions

Dendroclimatologists record history through trees

Potato beetle could be thwarted through gene manipulation

Hawaii expands coffee farm quarantine

Study explains flower petal loss

RSS story archive

Re: Re: HYB: ploidy - speculation

  • Subject: Re: [iris-talk] Re: HYB: ploidy - speculation
  • From: "Donald Eaves" <donald@eastland.net>
  • Date: Tue, 1 Jan 2002 12:13:10 -0600


>Sharon McAllister sent me an interesting article on this topic

Was it 'Karyotype Analysis of Bearded Iris' by Jvotirmay Mitra from
BOTANICAL GAZETTE, Volume 117, number 4 published 1956?  This article covers
evolutionary aspects in bearded irises.  A quote "It is suggested that
chromosomal repatterning, possibly as a result of segmental interchange,
inversion, or duplication, accompanied by both auto- and allotetraploidy,
has played an important role in the origin of bearded iris species."

On I. germanica "Karyotype analyses indicated that the 44-chromosome natural
hybrids, such as I. germanica, originated from the hybrid combination of
40-chromosome dwarf species and 48-chromosome tall species.  No new kinds of
chromosomes were seen in the 44-chromosome hybrids that were not present
either in 40-chromosome dwarf or 48-chromosome tall species."  I guess this
is why I. germanica is sometimes referred to as 'a natural hybrid' rather
than a species.

Segmental interchange of material between chromosomes is the part that
interests me.  Does this kind of interchange affect fertility?  Can the
result be similar enough to normal chromosomes to allow genetic material to
move into the gene pool of hybrid plants?  Is this, in fact, what is at work
in modern TBs with their varied background of species?

Donald Eaves
Texas Zone 7b, USA
>that managed to get buried in junk before I had a chance to read it, but
>is going to resurface once the remodeling mess is done (they were hoping
>to be done by Thanksgiving???).  I will try to post something that
>hopefully makes more sense after I find it and read it.  Assuming my ISP
>holds itself together for a while now.
>Unless Sharon has time & is willing to step in and once again attempt to
>translate my thought here into technically useful English! <g>
>Linda Mann east Tennessee USA zone 7/8
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

------------------------ Yahoo! Groups Sponsor ---------------------~-->
Tiny Wireless Camera under $80!
Order Now! FREE VCR Commander!
Click Here - Only 1 Day Left!


Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ 

 © 1995-2017 Mallorn Computing, Inc.All Rights Reserved.
Our Privacy Statement
Other Mailing lists | Author Index | Date Index | Subject Index | Thread Index