Induction and evaluation of polyploidy in some local potato varieties of Bangladesh

To improve the yield potential in this present experiment colchicine were applied on sprouting bud and subsequent selected buds of Bangladeshi local potato. Colchicine treatment showed an increase effects in plant height in the variety of Hagrai, Silbilati & Lalpakri and the var. of Challisha showed no increase result besides, negative impact showed in var. Indurkani, JPR, Goforown and Shaita. Number of leaves formation was showed significant positive results in the variety of Hagrai, Shilbilati and Lalpakri showed positive while the var. of Challisha, JPR, Goforown and Shaita were showed negative result at different stage. The variety of Hagrai, Shilbilati and Lalpakri significantly showed more performance for fresh weight of plant and var. Hagrai responded the highest impact at different intervals, besides Challisha, JPR and Goforgown did not responded. The var. of Hagrai and Lalpakri at all the intervals produced highest number of tubers than rest of varieties. Hagrai and Lalpakri were showed the positive yield performance at the 70 DAPs but Silbilati and Lalpakri were showed the positive impact at the 80 DAPs. In all intervals Lalpakri obtained the best performance after Colchicine treatment. The variety Hagrai, Shilbilati and Lalpakri responded significantly in plant height, number of leaves formation and fresh weight potential of plant, though positive but no significant performance in tuber formation and fresh weight production of tubers after colchicine treatment. This might be explained that colchicine treatment enhances plant height, results in more fresh weight of plant and number of leaves, which consequently increase the number of tuber and finally increase total fresh weight of tubers of potato.