Combine mcmctree analysis

[Adrian Luczon]

Hello

I have a 1.4 billion basepair alignment that I would like to estimate the divergence time. I ran it using mcmctree on an HPC, but I always run out of memory. I then cut my alignment into smaller 30 million bp chunks. I tried the mcmctree analysis on some of these chunks, and it finally worked. 

I would like to ask if there's any way to combine the results from mcmctree analyses of these different chunks to get a divergence estimate. 

Thank you for the advice.

Adrian