Unfortunately, the "HighDelta" was one of their experimental transgenic lines and so not available for general purpose (amateur) breeding experiments.
Prolycopene is considered more bioavailable than lycopene itself, but I don't know how it relates to the more terminal carotenes.
There is some evidence out there for additional beta-carotene synthesis outside the lycopene pathway, but I haven't gathered enough information to make sense of it yet.
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