NOVELTY - Reducing the lignin content and/or modifying the lignin profile of a sugarcane plant, cell and/or tissue, comprises mutagenizing nucleic acid in a sugarcane plant, cell and/or tissue to produce a stable, inactivating deletion or insertion in more than 50% of the alleles or copies of the sugarcane plant, cell and/or tissue that encode CoA O-methyltransferase (COMT), thus reducing the lignin content of the sugarcane plant, cell and/or tissue and/or modifying the lignin profile of the sugarcane plant, cell and/or tissue as compared to a wild type sugarcane plant, cell and/or tissue.    USE - The methods are used for reducing the lignin content and/or modifying the lignin profile of a sugarcane plant, cell and/or tissue; increasing the efficiency of conversion of sugarcane lignocellulosic biomass into biofuel; and providing an animal feed having increased digestibility (all claimed).    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are:    (1) a genetically modified sugarcane plant, cell and/or tissue produced according to the method defined above and comprising a stable, inactivating deletion or insertion in more than 50% of the alleles or copies encoding COMT in the sugarcane plant, cell and/or tissue;    (2) a crop comprising the genetically modified sugarcane plant of (1) planted together in an agricultural field;    (3) a product produced from the genetically modified sugarcane plant, cell and/or tissue of (1);    (4) a method of increasing the efficiency of conversion of sugarcane lignocellulosic biomass into biofuel by providing a sugarcane plant of (1) or the crop of (2); and converting the lignocellulosic biomass from the sugarcane plant and/or crop into biofuel, thus increasing the efficiency of conversion of sugarcane lignocellulosic biomass into biofuel as compared to a wild type sugarcane plant or crop; and    (5) a method of providing an animal feed having increased digestibility by providing a plant of (1) or crop of (1); and converting the lignocellulosic biomass from the plant and/or crop into animal feed, thus providing a more readily digestible animal feed.