1 www.cornous.com Received: 20 December 2022 Accepted: 13 February 2023 Published: 31 March 2023 *Correspondence MD. Omar Faruq ofaruq.cti@gmail.com Volume: 10 Issue: 1 Pages: 1-11 Journal of Innovative Agriculture Research Article DOI: https://doi.org/10.37446/jinagri/rsa/10.1.2023.1-11 Effect of variety and irrigation on tuber growth rate of potato MD. Salim 1 , MD. Mahbubur Rahman 2 , MD. Omar Faruq 3* 1 Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Salna, Gazipur-1706, Bangladesh. 2 Department of Agronomy, Bangladesh Agricultural Research Institute, RARS, Barishal-8211, Bangladesh. 3 Former Scientific Officer, Krishi Gobeshona Foundation (KGF), Bandarban Sadar-4600, Bandarban, Bangladesh. The experiment was carried out in the field using a three replicate strip plot design. In the experiment, four potato varieties were used, namely Diamant, Cardinal, Asterix, and Lady Rosetta, and four irrigations were used as treatments. Four varieties and four irrigations were assigned randomly to plots. There were seven rows in each plot at 60cm distance and fourteen plants in each row at 25cm distance. The total area of each plot was 14.7 m 2 (4.2 m x 3.5 m). BARI Alu-25 (Asterix) and BARI Alu-8 (Cardinal) also produced higher tuber fresh weight (g) and tuber fresh yield (t/ha) under water stress and well- watered conditions. Experiments revealed that the varieties BARI Alu- 25 (Asterix) and BARI Alu-8 (Cardinal) demonstrated greater yield stability and yield contributing characteristics under water stress conditions and could be considered water stress tolerant varieties. Key words: tuber growth rate, irrigation, potato, water stress, irrigation INTRODUCTION Potato (Solanum tuberosum L.) is the fourth most important agricultural tuber crop in the world after winter wheat, maize, and rice; with overall world potato production of 388 million tons in 2017 (FAOSTA, 2019). Potato is the second largest agricultural crop in Bangladesh after rice and currently occupies a vital position inside the list of major crops in Bangladesh (Ali & Haque, 2011). In fact, the fast cycle of the potato lets in land to be set aside for growing some other plant (Hoque et al., 2012). Because the fourth most important food crop inside the world, the potato plays an increasingly vital role in worldwide food