information source and images of species

Follow the next link to a source of line drawings and illustrations. Thanks again Kay. Frank

This message was edited Feb 16, 2007 11:31 AM

Please try again - this is a dead link.

Hmm .. now this one is working - most of the sites in the links below refer to sites in america.

www.infochembio.ethz.ch/links/en/botanik_winden.html

X

This message was edited Feb 15, 2007 9:31 AM

KAY, I am glad you came back, but this is just a link. it is a reference link. The people on this thread that need this kind of reference, can get it it here. Thank you, Frank

This message was edited Feb 16, 2007 11:19 AM

This message was edited Feb 17, 2007 8:39 PM

Frank, didn't mean to offend you - it's just that I get 'this page cannot be displayed' when I click on the first link. It must be both of my computers.

Xeranthemum, thanks for fixing this. I am new to hyperlinking and can't imagine what went wrong. They are both the same and yours works.

Kay, no offence taken. This is a good site for illustrations. It is a dead link on my computer too, I just never tested it after I posted it. Xeranthemum posted it too and his works. Thanks for pointing it out.
Frank

Here is another one from Duke University about I. battas. http://www.hort.purdue.edu/newcrop/duke_energy/Ipomoea_batatas.html#Toxicity. Frank It is interesting how this one specie has been so important culturally and economically, over such a large part of the world . Frank

This message was edited Feb 16, 2007 7:52 PM

Does anyone know the whereabouts of chromosome count information of the various species?
Has anyone heard of the Chromosome Atlas of Plants, from Dr. Muriel Cave. Back in my college days, when dinosaurs roamed the earth, Dr. Cave maintained a news clipping servince year after year clipping professional periodicals that published chromosomes counts of species in various research endeavors. Her chromosome atlas gave depth and insight to researchers dealing with plant breeding.In the Family Convulaceae, there are around 50 genera. In one genus you might have a specie with the specific epithet "racemosa". This means a flower cluster that starts blooming at the bottom and continues to bloom out to the end. This is a wonderful characteristic to transport to a hybrid
Well then just say there is another specie, with the epithet "imperialis", this would indicate that the flowers are showy, even if fewer by comparison. Now just say I have paid good money for the few seeds of each specie that I do have, but don't want to waste the seeds, trying for a hybrid that would probably not happen because one specie has 16 chromosomes and the other one has 24.. If they are both the same count, this intergeneric cross is more likely to succeed. In cases like this I would crop the bud way back the day it obviously is going to bloon and pollenate the stub with the ripe other specie pollen. This is a good place to try some sophistocated growth regulators also. Boy am I looking forward to the up coming growing season..

OK, I have distracted you enough from the important question, does anyone know where to find genetic, and chromosome count infor mation for the family Convolvulaceae????????? pick up, Frank

This message was edited Feb 16, 2007 10:25 PM

Frank - Here's one site offhand
http://jhered.oxfordjournals.org/cgi/content/citation/55/5/216
but I can tell you that most Ipomoea have a count of 30 plus or minus a few chromosomes...

Strains from different geographic locations can show different chromosome counts within the same species...e.g.,Ipomoea nil 28 or 30...and Ipomoea purpurea like Ipomoea nil can vary up to 32...

Ipomoea batatas is variously polyploid...and the Merremia can vary alot in the chromosome counts...the very primitive species in the Family usually have lower chromosome counts e.g,. 16 but most of the commonly grown species are going to be 28 or 30...

Cross compatibility issues can often 'boil down' to the response of individual >(!!!) plants...

TTY,...

Ron

Thanks Ron. Until now, I didn't actually know a chromosome count of a single specie. I am more the theoretical botanist that thinks out loud, when the sky is the limit.

The plant group where I am most intimately aquainted with chromosome count is the Genus Adiantum in the ferns. There are about 250 species world wide and there are some similarities between them and other plants that I have seen as very interesting. In this group a simple little Adiatum specie might have only 16 c or 32 c in two different populations. But the latter was a natural tetraploid, that was included in the same specie Taxonomically. Then there are the ones that do not make much spore, but reproduce vegetatively like I. indica Blue dawn. In many photomicrograph that I looked at you could see the polarizing chromosomes during cell division, and in the background drifting around like litter were chromosome fragment relics, not joining in the cell division. The conclusion that I drew however erroneous it might have bee, was that one cell might wind up with a pocket full of relics and the sister cell would have none. To me this meant that one cell had a pocket full of wild cards, and the other one didn't. Is this the vehicle of mutation?????????

I feel trapped in ignorance with no major reference to use as an arbiter of any questions. The taxonomy of the family Convolvulaceae must be 50 years behind in updating. The site I posted for its illustrations, was also a dissappointment because they used the same illustration for all the synonums.
Now I guess I had better go to that link you posted, maybe I will find something cool. Thanks for your support Ron, it is much appreciated. Frank