0001235: request to solve error message for constucting time calibrated phylogenetic tree in MEGA

Notes
(0004248) gstecher (administrator) 2019-05-16 14:38	Hi Supriyo, I am writing in response to your question regarding the MEGA software. Can you send me the newick file that MEGA fails to parse so I can have a look? -- Best regards, Glen Stecher Institute for Genomics and Evolutionary Medicine igem.temple.edu

(0004251) gstecher (administrator) 2019-05-23 15:10	Hi Supriyo, Relative times have no unit. You can think of them more like ratios as they inform us about the relative distance between divergence times throughout the tree. To get divergence times you need to provide at least one calibration constraint. In the example data provided with MEGA, the mtCDNA files are for a tree of great apes and we provide a constraint that bonobo and chimpanzee diverged from a common ancestor between 2.4 and 3.2 million years ago. MEGA uses this to convert all relative times in the tree to real times of divergence. On 5/20/19 8:59 PM, Supriyo Basak wrote: > > Dear Dr. Glen Stecher, > > Many many thanks for clarifying the outgruop. I am seeing the papers which have been published citing timetree analysis using RelTime method have given the axis bar on milions year ago. But the attached tree is the on replative time units. Could you kindly let me know that 0.01 relative time corrosponds to how many milions years. I am not gettig how to correlate this two paramenters. > > Yours sincerely > > Supriyo Basak > > Post Doc, Kunming Institute of Botany > > Timetree analysis using the RelTime method on matK locus

Issue History
Date Modified	Username	Field	Change
2019-05-15 17:46	guest	New Issue
2019-05-16 14:38	gstecher	Assigned To	=> gstecher
2019-05-16 14:38	gstecher	Status	new => assigned
2019-05-16 14:38	gstecher	Note Added: 0004248
2019-05-23 15:10	gstecher	Note Added: 0004251
2019-05-23 15:10	gstecher	Status	assigned => resolved
2019-05-23 15:10	gstecher	Resolution	open => no change required

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