Help In Interpreting Phylogenetic Tree

Question

[Palu]

HI there, Actually, I recently found that my gene of interest is, interestingly, two in number in throughout monocot lineage but not in dicot except glycine. in Glycine, second copy is the product of intragenomic duplication but in monocot these are not the product of intragenomic duplication. my hypothesis is that these genes are orginated in monocot after the separation of dicot and monocots. Am I true?? I have attched the tree for furthur reference also. Please help me. I would be very grateful to you. kind regards

[Lars Juhl Jensen]

Please post a higher resolution version of the tree. It is impossible to see anything in the version you have posted.

[Lars Juhl Jensen]

BTW, for those who may be confused like I were: Glycine in this question refers to the soybean plant (Glycine max) and not the amino acid Gly.

Answer 1

[Vitis]

Basically, you're doing phylogenetic character mapping, in which you put evolutionary events onto a phylogenetic tree to see when they happened. The important thing about this is that the phylogeny you use for this purpose can't be inferred from the events you're trying to map. So the right way to do this is to use an existing phylogenetic hypothesis about angiosperm phylogeny, and place the gene duplication events onto the phylogeny, then you can see whether those events are shared by certain clades, or lineage-specific. I'm not gonna interpret your tree specifically, because those are for yourself to figure out.

[Burlappsack]

+1 for "the phylogeny you use...can't be inferred from the events you're trying to map"