Values of relatedness matrix exceed 0 and 1

Question

[csak_anna]

Hi, I am new to genetic analysis and I have created a relatedness matrix with collected feathers. I wanted to find out, how the distribution of birds is in a given area (nest hollows) and how the relation between them is. This was later analyzed with a mantel test.

For the matrix I used a dart file that contained the genetic data (SNPS), which I turned into a genlight object, and then into a gds. I then used the following command to create the matrix from the SNPrelate package: snpgdsGRM(file, method="GCTA")

I got values slightly exceeding 0 and 1, and I wonder why, and if this is correct.

Thank you for any inputs, I highly appreciate!

Answer 1

[Kevin Blighe]

This can occur under the following scenario (answer by the author): https://gcta.freeforums.net/thread/209/mean-get-estimate-vp-9999

Kevin