Physio-Bio chemical Studies on Thirty Genotypes of Potato (Solanum tuberosum L.)

Significant mean squares during two years were observed for leaf area, dry matter content, total chlorophyll content and protein content in tuber exhibiting differential performance of genotypes over different environments. Mean performance of genotypes pooled over two years indicated superiority of Kufri Chipsona-1, J/93-139, Kufri Chipsona-2, J/95-229, J/96-17 and Kufri Anand for tuber yield (480.38, 461.50, 437.38, 431.88, 428.13 and 423.88 q/ha, respectively). Number of tubers per hill was highest in Kufri Pushkar (8.84), JW-160 (8.54) and Kufri Chipsona-1 (8.38). Genotypes exhibiting high values of number of stolon per hill were Kufri Chipsona-1 (19.39), J/95-158 (17.94) and J/96-80 (17.79). Genotypes J/95-80 (90.84g) and J/96-171 (90.67g) exhibited better tuber weight. Genotype PS/96-14 had maximum number of leaves per shoot (18.94) whereas, maximum leaf area occurred in J/96-171 (181.09 cm2). Dry matter content was maximum in Kufri Chipsona-2 (23.55%) followed by Kufri Chipsona-1 (23.22%). Ascorbic acid was found highest in Kufri Bahar (27.18 mg/100g fresh wt.) followed by Kufri Jyoti (26.48 mg/100g fresh wt.). Protein content was maximum in J/95-144 (1.91%) and Kufri Jawahar (1.86%). TSS content was highest in J/93-139 and Kufri Pukhraj (1.59 followed by Kufri Chipsona 2 (1.57 mg)and J/95-221, J-95-80 and J/96-80 (1.56 mg each) J/92-159 (7.39 ?B) followed by Kufri Chipsona-1 (7.27 ?B) and J/95-242 (7.25 ?B ). Total chlorophyll content was highest in J/95-80 and Kufri Pukhraj (1.59 mg/g fresh wt.).