Morning Glories: Morning Glories 2006 #3, 1 by RON_CONVOLVULACEAE
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In reply to: Morning Glories 2006 #3
Forum: Morning Glories
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RON_CONVOLVULACEAE wrote: Hey guys - computer related difficulties and some other matters = haven't been posting as much,mbut will try to catch up asap... Joseph - congrats(!) on the photos...very helpful....I'm tending to agree with the view that the BerryIce in the photos above looks like a slight variant of the 'Xiong's fabulous Chinese MG' flower...the sepals look almost identical and so in this case are not differentiating between the two flower variations...although the Xiongs looks to be displaying at least one of the multiple genes responsible for a wider outer rim margin... The Furisode looks remarkably similar to a Lavender silk... The leaves on the Ipomoea species I tentatively called redburst are somewhat different than I had anticipated...the seeds and very small photo I received looked to be Ipomoea hederifolia or possibly an Ipomoea coccinea,but the leaves in the photo you posted above,so far aren't displaying very typical leaves of either of the suspected species...perhaps as the plant matures,the leaves may develop more typical characteristics...or,maybe it will turn out to be a different species...let's see what develops... Janett - the color on your chocolates is looking good...although the repoductive parts on the Kanoko here http://davesgarden.com/forums/fp.php?pid=2602417 look to be displaying the darkened discoloration of the unfortunate premature senescence that can afflict these types resulting in little or low seed production... The colors on Everyones MG's look great... Regarding predicting the outcome of intraspecific crossings of different Morning Glory colors,I'd like to mention that the outcome of color crossings in MG's is not as easy or as 'cut and dry' as occurs in other Families of plants... There are numerous genes that are responsible for the various colors,sizes and patterns and these manifold genes display varying(!) degrees(!) of incomplete(!) dominance(!) or recessiveness...the genes of incomplete(!) dominance and recessiveness may not show up for several generations,so usually when someone mentions a strain that is 'pure' for a particular trait,I (understandably?)> look up to heaven...additionally,there are a number of plants that are going to display polymorphic loci,allelomorphic mutations as well as other types of various mutations...so ,without the instant genetic analysis availble to well funded laboratories to know precisely what it is that you have>predicting the outcome and determining the hows and whys of what has occurred to produce a particular looking flower is 'just not as simple' as it is in other plant Families... Convolvulacea uses a basic pollen intraspecific compatibility system that uses a 4 code system,as compared to many other families of plants that use a simpler 2 code system...this 4 code system contributes to the difficulties encountered in various degrees of self-incompatibility within the same species...additionally Convolvulacea uses what is known as double pollination>where a single pollen granule caries and delivers 2 (!) sperm cells which are used to fertilize a single ovule...this is a more complicated system than the more usual single pollination system where only 1 sperm cell fertilizes a single ovule... The combination of the above factors related to pollen compatibility/acceptabilty to all subparts of the gynoecium combined with the aspects of double fertilization make the usual outcome predictions applicable to other Families of plants 'inoperative' as applicable to Convolvulaceae and so>I usually refrain from going into alot of 'fine' details on this particular aspect because of the complicated 'quagmire' of potentialities involved...because there really isn't any simple 'cut and dry' method of determing what you have or what it is going to produce... Keep growing and enjoying the flowers despite the mechanisms involved in how the different colors and patterns are produced... TTY,... Ron P.S. - attached is a photo reproduced from an article in the PNAS showing the variations in color resulting from dominant and recessive genes at the a,p,i and w loci and a link to Mark Rausher's lab http://www.duke.edu/~mrausher/wloc.htm |