Rancheras is a genre of the traditional music of Mexico originally sung by only one performer with a guitar. It dates to the years of the Mexican Revolution in the early 20th century. It later became closely associated with the mariachi groups which evolved in Jalisco. Drawing on rural traditional folk music, ranchera developed as a symbol of a new national consciousness in reaction to the aristocratic tastes of the period. Rancheras are also noted for the grito mexicano, a yell that is done at musical interludes within a song, either by the musicians and/or the listening audience. The word "ranchera" was derived from the word rancho because the songs originated on the ranches and in the countryside of rural Mexico.