Pantnagar Journal of Research

Abstract

Micro-plants of potato of two varieties (Kufri girdhari & K. giriraj) were produced through micropropagation using virus free cultures. For mini-tuber production, micro-plants were transplanted in the poly-house in the month of January and harvested after 150 days. Weight of mini-tuber (G0) ranged 2.73 – 20.83 & 4.55 – 24.04g in K. girdhari and K. giriraj respectively. The relationship between number and weight of G0 tubers showed positive linear correlation in both the varieties. For the first generation (G1) seed production, G0 was divided in to five categories on the basis of tuber weight and sowing was done in the open field. Highest yield was recorded in K. girdhari in the first category (161.8 q/ha) whereas lowest was in K. giriraj in the fifth category (22.20 q/ha). In the second category yield was at par in both the varieties (114.00 – 111.00 q/ha). Though K. giriraj showed lower yield but highest per cent increase in average tuber weight was recorded in category fourth and fifth as compared to K. girdhari.