Not only are they fertile, it is standard protocol to purchase competitors hybrid F1 seed and produce F2 seed in most species (except corn). Eventually plant breeders create inbreds (self-pollinating for 6+ generation’s). These inbreds are the used to make new F1 hybrids. In Europe this is referred to as “plant breeders rights”.
In corn they have to get a little bit more creative. Corn breeders have to keep distinct genetically distant breeding pools to maintain heterosis in their the resulting hybrids. They pull traits from a competitors hybrid utilizing backcross breeding into their breeding pools.
Stop your bullshit.
Not only are they fertile, it is standard protocol to purchase competitors hybrid F1 seed and produce F2 seed in most species (except corn). Eventually plant breeders create inbreds (self-pollinating for 6+ generation’s). These inbreds are the used to make new F1 hybrids. In Europe this is referred to as “plant breeders rights”.
In corn they have to get a little bit more creative. Corn breeders have to keep distinct genetically distant breeding pools to maintain heterosis in their the resulting hybrids. They pull traits from a competitors hybrid utilizing backcross breeding into their breeding pools.