The white grape variety (breed number Walker 09314-102) is a complex, interspecific new breed between varieties of the species Vitis vinifera (97%), Vitis rupestris (1.5%) and Vitis arizonica (1.5%). The Vitis vinifera varieties involved were Cabernet Sauvignon (62.5%), Chardonnay (12.5%) and Carignan Noir mazuelo (12.5%). The cross was made in the 1990s by the geneticist Dr. Andrew Walker, professor at the University of California in Davis. Incidentally, is from the same varieties Caminante Blanc emerged. The early ripening vine is extremely resistant to the due to the climate change increasing disease Pierce Disease, It yields straw yellow, light bitter White wines with aromas of apples, citrus, limes and gooseberries.