Question: Criteria for identifying tandem and segmental duplicates
gravatar for kozhaki.seq
5.7 years ago by
Korea, Republic Of
kozhaki.seq60 wrote:

There are previous reports available on the estimated  tandem and segmental  duplicated genes (TDs and SDs) in rice ( But I am not sure about the  reliability of  the data.Hence,I would like to analyze TDs and SD genes (not blocks) in rice.

Here, I am unable to make a criteria for TD and SD estimation (a condition which gives better reliable data). I noticed different groups used their-own criteria. For ex,  the previous work uses "identity was > = 30% and the alignment covered > = 70% of the protein length" for TD. In other work, > 94% identity is used for SD (

1. Can anyone give suggestion before my analysis? I mean a cut off for TDs and SDs identification separately.

2. If anyone know a software suit which deals such duplicated genes estimation, it would be helpful. (FYI: I found some published suits, but the webpage is not working).


Thank you.




ADD COMMENTlink modified 5.3 years ago by Hranjeev1.5k • written 5.7 years ago by kozhaki.seq60
gravatar for Hranjeev
5.3 years ago by
Hranjeev1.5k wrote:

The typical criteria that defines a segmental duplication is that the sequence is at least 1kb and 90% identical to the duplicate.

ADD COMMENTlink written 5.3 years ago by Hranjeev1.5k
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