SCREENING OF POTATO VARIETIES TO EARLY HEAT CONDITION IN NORTHERN PART OF BANGLADESH

Abstract

A field experiment was conducted at the farmers field located at Nekmarad, Ranishankoil, Thakurgoan from September 04, 2019 to February 29, 2020 to find out the growth and yield performance of different potato varieties to early heat condition. Fifteen potato varieties viz. Carolus, Granula, Farida, Taisiya, BARI Alu-41, Aloutte, Zina red, BARI Alu-72, Columba, Memphis, Fortus, Cimega, 747, Asterix and Diamant were considered in this experiment. The experiment was conducted in Randomized Complete Block Design (RCBD) with three replications. Uniform cultural practices were adopted for all treatments. Significant differences in growth and yield parameters were observed among the varieties. Results revealed that the variety 'Taisiya' took the maximum days (14.67 days) for start emergence whereas, the minimum (10 days) was taken by 'Cimega'. In case of eighty percent emergence, 'Granula' was the early to 80% emergence variety whereas, 'Zina red' was the late one. The emergence percentage of the variety 'Granula' was maximum (99.44%) at 30 days after planting (DAP) and the minimum (50%) was measured from 'Cimega'. The longest plant height (110.2 cm) was measured at 60 DAP from '747' variety whereas the shortest one (74.53 cm) from 'Aloutte'. The maximum stem numbers hill-1 (7.73) was obtained from the variety 'Zina red' at 60 DAP and minimum (3.27) was obtained from 'Granula'. At 60 DAP, the maximum percentage of foliage coverage plant-1 (96.00%) was observed from the variety 'Carolus' whereas the minimum number (81.00%) was observed from 'Zina red'. Result also revealed that the maximum number of tuber (13.67) was recorded from the 'Cimega' variety whereas, the minimum (4.33) was obtained from the 'BARI Alu-72' variety. The maximum average tuber weight (455.33 g) was recorded from the 'Carolus' variety whereas, the minimum (193.00 g) was obtained from the 'Memphis' variety. The highest tuber yield (30.36 t ha1 ) was obtained from the variety 'BARI Alu-41' while the minimum (12.87 t ha-1 ) was found from the 'Memphis'. In case of quality parameter, the maximum dry matter content of tuber flesh (22.10 %) was recorded from the variety 'Fortus' which statistically similar with 'Diamand' (21.52 %) whereasthe minimum tuber flesh dry matter content (13.56 %) was recorded from 'Aloutte'. Numerically the highest specific gravity (1.0827 g cm-3 ) was obtained from the 'Diamand' whereas, the lowest (1.0420 g cm-3 ) specific gravity was found from the 'Memphis' variety. Considering the results of the present experiment, it may be concluded that early heat condition had potential effect on growth and yield performance of potato.