Syrah and named after Dr. Francois Durif. Durif is a cross breed between the lesser known Peloursin and Syrah. Regions such as Rutherglen have achieved international regard for their Durif. This varietal is similar to Shiraz but is even more full-bodied and tannic because of the smaller, thicker-skinned grapes used. Petite Sirah is widely planted in California, where it is popular as a varietal (for example, by Bogle Vineyards), and especially blended with Zinfandel, which results in a rich, bold and fruity wine. Syrah Syrah (), also known as Shiraz, is a dark-skinned grape variety grown throughout the world and used
Phenolic content in wine grapes varies depending on the variety with Cabernet Sauvignon, Nebbiolo, Syrah and Tannat being 4 of the most tannic grape varieties. The reaction of tannins and anthocyanins with the phenolic compound catechins creates another class of tannins known as pigmented tannins which influence the color of red wine. Commercial preparations of tannins, known as "enological tannins", made from oak wood, grape seed and skin, plant gall, chestnut, quebracho, gambier and myrobalan fruits, can be added at different stages of the wine production to improve color durability. The tannins derived from oak influence are known as "hydrolysable tannins" being created from