NOVELTY - A transformant obtained by introducing at least one DNA e.g. (a) (i) DNA or its analog encoding acetohydroxyacid synthase derived from Corynebacterium glutamicum and comprising amino acid sequence in which glycine at position 156 is mutated to glutamic acid, or (ii) DNA comprising base pair sequence capable of hybridizing under stringent conditions with base pair sequence complementary to the DNA (i) and having acetohydroxyacid synthase activity, to host coryneform bacteria, is new.    USE - The transformant, preferably C.glutamicum VAL 4 transformant (clamied) is useful as pharmaceutical, foodstuff, cosmetic, and feed additive, in bio-refinary, and for manufacturing biofuel.    ADVANTAGE - The transformant is environmentally-friendly as it is used in bio-refinery.    DETAILED DESCRIPTION - A transformant obtained by introducing at least one DNA chosen from (a) (i) DNA or its analog encoding acetohydroxyacid synthase derived from Corynebacterium glutamicum and comprising amino acid sequence in which glycine at position 156 is mutated to glutamic acid, or (ii) DNA comprising base pair sequence capable of hybridizing under stringent conditions with base pair sequence complementary to the DNA (i) and having acetohydroxyacid synthase activity, (b) (i) DNA or its analog encoding acetohydroxy acid isomeroreductase derived from C.glutamicum and comprising amino acid sequence in which serine at position 34 is mutated to glycine, leucine at position 48 is mutated to glutamic acid and arginine at position 49 is mutated to phenylalanine, or (ii) DNA comprising base pair sequence capable of hybridizing under stringent conditions with base pair sequence complementary to the DNA (i) and having acetohydroxy acid isomeroreductase activity, and (c) (i) DNA or its analog encoding leucine dehydrogenase derived from Lysinibacillus sphaericus, or (ii) DNA comprising base pair sequence capable of hybridizing under stringent conditions with base pair sequence complementary to the DNA (i) and having leucine dehydrogenase activity, to host coryneform bacteria, is new. An INDEPENDENT CLAIM is included for method for recovering valine in reaction liquid, which involves contacting the transformant with saccharide in reaction liquid.