Good morning Madam Thank you very much for this elaborate lesson on mutation and chromosomal aberration.
Since the flower in https://groups.google.com/forum/#!msg/indiantreepix/7-kRSVOxAMQ/sDatK69AGYAJ had not been resulted out of sacrificing stamens (as have been explained in https://en.wikipedia.org/wiki/Double-flowered#Genetics_of_double-flower_mutations), i think the abnormality lies in tissue differentiation due to certain changes in gene expressions, rather than a polyploidy condition. Regards, surajit On Wed, Jul 3, 2013 at 12:51 AM, Madhuri Pejaver <[email protected]>wrote: > Dear Gargji and Surjitji, > Thanks for the querry. > First when the word Mutation got coined it was for the modification of > similar nature in plant Oenothera lamarkiana. In this the leaves and > flowers of the plant was suddenly observed to be larger on one branch of > the plant. There was no indication of such change prior when it was > visible. Hence Hugo de varies called it as Mutation which means sudden > change without any indication in the previous generation. > Latter when the structure of gene was studied and is known the changes > which occur at gene level are called as Mutation. While the changes which > occur in numerical form or structural form of chromosomes are called as > chromosomal aberrations. > Accordingly the actual discovery of mutation also was turned out to be > chromosomal aberration. When the change occurs at gene level it is called > as mutation. eg diseases like Thalasemia, hole in the septum of heart, or > such are examples of point mutations. Not able to recollect the examples in > plants. But if such changes occur in the reproductive cells/germinal cells > they are passed to the gametes and then to the next generation. But if the > changes occur in somatic cells then they are not passed to future > generation. > Thus after the discovery of genes the chromosomal aberrations and the > mutations are differentiated. The polyploidy thus falls under Chromosomal > aberrations. > Madhuri > *From:* J.M. Garg <[email protected]> > *To:* efloraofindia <[email protected]> > *Cc:* surajit koley <[email protected]>; Shubhada Nikharge < > [email protected]>; Madhuri Pejaver <[email protected]>; > Ushadi Micromini <[email protected]> > *Sent:* Tuesday, 2 July 2013 6:23 PM > *Subject:* Fwd: [efloraofindia:158665] what produces double flower ??? > > Forwarding again for any assistance in the matter please. > > > ---------- Forwarded message ---------- > From: *surajit koley* <[email protected]> > Date: 27 June 2013 23:45 > Subject: [efloraofindia:158665] what produces double flower ??? > To: efloraofindia <[email protected]> > > > Sir, > > This is related to earlier discussion - > https://groups.google.com/forum/#!msg/indiantreepix/7-kRSVOxAMQ/sDatK69AGYAJ > and > part thereof - > https://groups.google.com/forum/?hl=en#!topic/indiantreepix/WacK5j7fs1g. > > It seems to me that two flowers (*Crinum latifolium*) fused together! > > Why? > > Polyploidy, as had been explained in the above threads? > > Or, was it mutation in normal diploid cells? > > I tried to find.... but.... > > Polyploidy can result various alterations - > > 1. > > http://www.gardengenetics.com/gardengenetics/2011/01/polyploid-induction-i-----potential-benefits-to-the-end-user.html > 2. > > http://www.gardengenetics.com/gardengenetics/2011/02/polyploid-induction-i-----potential-benefits-to-end-user.html > 3. > > http://www.gardengenetics.com/gardengenetics/2011/02/polyploid-induction-iii-potential-drawbacks.html > 4. http://plantbreeding.coe.uga.edu/index.php?title=5._Polyploidy > > Very tough for a layman - > > - > > https://en.wikipedia.org/wiki/Double-flowered#Genetics_of_double-flower_mutations > - https://en.wikipedia.org/wiki/ABC_model > - http://biology.ucsd.edu/news/article_051000.html > - http://www.google.com/patents/EP0578941A1?cl=en > > Can anybody please explain in simpler terms? > > Thank you > Regards > surajit > > > > > -- > You received this message because you are subscribed to the Google Groups > "efloraofindia" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to > mailto:indiantreepix%[email protected]<indiantreepix%[email protected]> > . > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/indiantreepix. > For more options, visit https://groups.google.com/groups/opt_out. > > > > > > -- > With regards, > J.M.Garg > http://en.wikipedia.org/wiki/User:Jmgarg1 > 'Creating awareness of Indian Flora & Fauna' > The whole world uses my Image Resource of more than a *thousand species*& > eight thousand images of Birds, Butterflies, Plants etc. (arranged > alphabetically & place-wise): > http://commons.wikimedia.org/wiki/Category:J.M.Garg. You can also use > them for free as per Creative Commons license attached with each image. > For identification, learning, discussion & documentation of Indian Flora, > please visit/ join our Efloraofindia Google e-group (largest in the world): > http://groups.google.co.in/group/indiantreepix (more than 2110 members & > 1,56,000 messages on 31/5/13) or Efloraofindia website: > https://sites.google.com/site/efloraofindia/ (with a species database > of more than 8500 species). > Also author of 'A Photoguide to the Birds of Kolkata & Common Birds of > India'. > > > -- You received this message because you are subscribed to the Google Groups "efloraofindia" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/indiantreepix. For more options, visit https://groups.google.com/groups/opt_out.
