The effect of Minituber Weight on their Field Performance under a Northern European environment
2019
Dimante, I. | Mežaka, I. | Gaile, Z.
Weight of potato minitubers as well cultivar affects field performance of minitubers.The aim of this study was to compare minitubers of four weight classes (MtC) (3 to 4.99 g, 5 to9.99 g, 10 to 19.99 g, and > 20 g) with respect to their field performance. Three year experimentswere conducted at AREI, Latvia (57°19′ N, 25°20′ E) between 2014 and 2016. Cultivars ‘Monta’,‘Prelma’ and ‘Mandaga’ were used. A significant relationship between the number of stems andthe number of progeny tubers per plant was detected and the number of stems explained 74% ofvariation in progeny tuber number. Multiplication rate, expressed as the number of progenytubers > 25 mm per planted minituber, was in range from 4.2 to 13.1 tubers and was significantlyaffected by the cultivar and MtC. Cultivar and MtC had significant effect on the number of tubersand tuber yield per m2. The number of progeny tubers and yield increased with increases for MtC.The highest number of progeny tubers (size > 25 mm) per m2 were obtained fromminitubers > 20 g of ‘Prelma’ (93.4), but the highest yield was from minitubers > 20 g of‘Mandaga’ (4.92 kg m-2). The effect of MtC was more pronounced on number of tubers than ontuber yield. Cultivar and MtC determined mean size (diameter (μ)) of progeny tubers. Mean sizeincreased as MtC decreased. MtC had a significant effect on standard deviation (σ) only for‘Prelma’. When σ was recalculated to coefficient of variation (CV), no significant effect of MtCremained.
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