It tells you what the paragraph is going to be about.
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.
And, he noted, the company will sell 14 hybrid and electric models by the end of next year. For the U.S. market, those include the Volkswagen Jetta Hybrid and Touareg Hybrid, the Audi Q5 Hybrid, the Porsche Cayenne S Hybrid and Panamera S Hybrid, and the upcoming Panamera S E-Hybrid, the company's first plug-in hybrid.