NOVELTY - An isolated polypeptide having beta-glucosidase activity, is new.    USE - The polypeptide can be used for producing a beta-glucosidase-free product. It can be used to saccharify a cellulosic material to fermentable sugars and convert the fermentable sugars to many useful substances, e.g. chemicals and fuels.    DETAILED DESCRIPTION - A new isolated polypeptide has beta-glucosidase activity selected from: (a) a polypeptide comprising an amino acid sequence having at least 95% identity to a fully defined 476 amino acid sequence (SEQ ID NO. 2) given in the specification; (b) a polypeptide encoded by a polynucleotide that hybridizes under at least high stringency conditions with (i) a fully define 1431 bp sequence (SEQ ID NO. 1) given in the specification, (ii) the genomic DNA sequence comprising SEQ ID NO. 1, or (iii) a full-length complementary strand of (i) or (ii); (c) a polypeptide encoded by a polynucleotide comprising a nucleotide sequence having at least 95% identity to SEQ ID NO. 1; and (d) a variant comprising a substitution, deletion, and/or insertion of one or more (several) amino acids of SEQ ID NO. 2. INDEPENDENT CLAIMS are:    (1) an isolated polynucleotide comprising a nucleotide sequence that encodes the polypeptide;    (2) a nucleic acid construct comprising the polynucleotide operably linked to one or more control sequences that direct the production of the polypeptide in an expression host;    (3) a recombinant host cell comprising the nucleic acid construct;    (4) a method of producing the polypeptide;    (5) a method of producing a mutant of a parent cell comprising disrupting or deleting a nucleotide sequence encoding the polypeptide, which results in the mutant producing less of the polypeptide than the parent cell;    (6) a mutant cell produced by the method above;    (7) a transgenic plant, plant part, or plant cell transformed with a polynucleotide encoding the polypeptide;    (8) a double-stranded inhibitory RNA (dsRNA) molecule comprising a subsequence of the polynucleotide, where optionally the dsRNA is a small interfering RNA (siRNA) or a microRNA (miRNA) molecule;    (9) a method of inhibiting the expression of a polypeptide having beta-glucosidase activity in a cell comprising administering to the cell or expressing in the cell a dsRNA molecule, where the dsRNA comprises a subsequence of the polynucleotide above;    (10) a method for degrading or converting a cellulosic material comprising treating the cellulosic material with a composition comprising one or more cellulolytic proteins in the presence of the polypeptide having beta-glucosidase activity; and    (11) a method for producing a fermentation product, comprising: (a) saccharifying a cellulosic material with a composition comprising one or more cellulolytic proteins in the presence of the polypeptide having beta-glucosidase activity; (b) fermenting the saccharified cellulosic material of (a) with one or more fermenting microorganisms to produce the fermentation product; and (c) recovering the fermentation product from the fermentation.