Hybrid Ryegrass is one of the best grasses available, this certain grass is a cross between the Italian and perennial forms of ryegrass, shares characteristics of both. The dominant parent determines how the variety performs in the field. Many hybrid varieties are dominant with Italian genes and the best cultivars provide the same or similar high yields. As they also contain some of the persistent genes of the perennial ryegrass parent they will last longer. Lasting longer and high yielding silage grass has one further advantage: the genes of the perennial ryegrass parent produces a plant with more tillers and leafs which gives increased ground cover, this also benefits grazing.