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An F1 hybrid (or filial 1 hybrid) is the first filial generation of offspring of distinctly different parental types. F1 hybrids are used in genetics, and in selective breeding, where it may appear as F1 crossbreed. The term is sometimes written with a subscript, as F1 hybrid.
Here Are the Top-Scoring Plug-In Hybrids on Our Site. Several automakers are continuing to add electric vehicles to their lineups, and many are in the form of plug-in hybrid vehicles (PHEVs). Adding an electric motor to work alongside the traditional gas powertrain makes for additional horsepower, instant torque, and increased efficiency.