Hi Vinoth,
You don't mention your SLD landscape set up. Does each system (PRD, QA and DEV) use one Central SLD or do they use a separate SLD?
The source/target Business Systems should exist in each of the SLD's, if you have multiple SLDs involved. Also check the resources below.
SAP SCN blog: Transport Targets and Groups in the SLD
SAP help: Configuring Groups and Transport Targets in the SLD
Regards
Mark