To a particular genome (genetics)? No there is not, it tends to be an individual company giving it their own database identifier. Besides which, few companies of this sort really are open for sharing a lot of this information (hence why there is no standardization).
With a big seed company, that sequences (or partially sequences) thousands of seeds a week, it is difficult to have a broader standard. The only truly unique identifier would be the whole genome, but rarely is the whole genome sequenced; just key traits (that may vary by the company, or what research they are doing).