The present study was carried out at Central Potato Research Station, Shillong during 2013 and 2014 to assess the growth and yield performance of three grades of in-vitro produced micro-tubers viz. >8 mm, 4-8 mm and <4 mm of two potato (Solanum tuberosum) cultivars namely Kufri Girdhari and Kufri Megha under field planting conditions. The experiment was laid out in a randomised block design with four replications using a common spacing of 50 × 20 cm. The larger grade micro-tubers generally exhibited better physiological growth as well as yield parameters. The larger sized micro-tuber (>8 mm) showed significantly superior plant survival, canopy cover, plant height, number of compound leaves per plant, number of stems per plant and plant vigour followed by 4-8 mm grade and <4 mm grade micro-tubers. Similar trend was observed for all the yield parameters. Among varieties, Kufri Girdhari out performed Kufri Megha in all the growth and yield parameters in all the micro-tuber grades. Thus both micro-tuber size and genotype influenced the field performance. The overall finding indicates that micro-tubers irrespective of the size for both the varieties can produce mini-tubers successfully under direct field conditions in the NEH region which will facilitate quality seed production.
The study was conducted at Central Potato Research Station, Shillong during 2013 and 2014 to evaluate the performance of three potato (Solanum tuberosum L.) varieties, viz. Kufri Megha, Kufri Himalini and Kufri Himsona in an aeroponics system installed under net cum polyhouse. All the varieties exhibited more than 90% survival with root initiation within 4-5 days of transplanting. Kufri Megha started tuber initiation within a month in both the years. Tuber initiation was late in Kufri Himalini in 2014 (60 days) as compared to 2013 (39 days). Kufri Himsona exhibited delayed tuber initiation at 69 to 75 days after transplanting in both the years. The first picking was done within 40 and 80 days after transplanting in Kufri Megha and Kufri Himsona, respectively, in both the years. First picking in Kufri Himalini was delayed by 15days in 2014 as compared to 50 days after transplanting in 2013 due to delayed tuber initiation. The crop duration of Kufri Megha was 110 and 134 days in 2013 and 2014, respectively, allowing for 8 to 9 pickings that yielded 108 to 118 g ubers/plant (38 to 42 tubers/plant) with mean mini-tuber weight of 2.91 to 2.96 g. The number of pickings reduced significantly from 11 to 5 in Kufri Himalini and 7 to 4 in Kufri Himsona from 2013 to 2014. In Kufri Himalini, delay in tuber initiation and reduction in crop duration was observed in 2014. There was a significant reduction in per plant yield in both Kufri Himalini (162 g to 102 g) and Kufri Himsona (138 g to 39.25 g) accompanied by reduction in number of tubers/plant (38 to 27 tubers in Kufri Himalini and 29 to 11 tubers in Kufri Himsona). The mean mini-tuber weight also reduced from 4.32g to 3.87g in Kufri Himalini and 5.03g to 4.13g in Kufri Himsona.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.