Mannanase variants and polynucleotides encoding same

A variant of a parent mannanase, which comprises

• (a) a substitution with A, R, D, N, C, E, G, H, I, L, K, M, F, P, S, T or W or a deletion of Q, at the position corresponding to position 168 of SEQ ID NO:
• 1;
• and
• (b) a second substitution or a second deletion at one or more positions corresponding to positions selected from the group consisting of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 25, 26, 30, 35, 36, 37, 38, 42, 45, 46, 48, 49, 53, 57, 61, 63, 64, 65, 68, 69, 70, 72, 74, 76, 78, 82, 83, 86, 89, 94, 96, 97, 100, 101, 103, 105, 109, 110, 111, 112, 115, 117, 118, 120, 121, 122, 123, 126, 129, 130, 134, 137, 139, 141, 142, 143, 148, 155, 160, 161, 162, 163, 164, 165, 166, 167, 169, 170, 171, 172, 174, 176, 178, 179, 181, 182, 183, 184, 185, 188, 189, 190, 192, 193, 195, 197, 198, 210, 213, 214, 215, 217, 218, 219, 228, 235, 239, 242, 248, 249, 252, 253, 254, 258, 259, 260, 267, 270, 271, 272, 276, 280, 283, 286, 296, 299, 301, 304, 312, 315, 321, 322, 323, 324, 342, 344, 347, 351, 352, 354, 355, 358, 363, 366, 368, 377, 378, 379, 380, 385, 391, 398, 403, 408, 410, 413, 414, 417, 419, 422, 423, 437, 438, 440, 442, 443, 452, 454, 462, 463, 466, 467, 470, 472, 473, 477, 479, 480, 482, 483, 484, 486, 487, 488, 489, 490, and 491 of SEQ ID NO:
• 1;
• wherein the variant has mannanase activity and has at least 85% sequence identity to the amino acid sequence of SEQ ID NO:
• 1.