Summary
Plants grown from seed derived by crossing conventional European S. tuberosum material were compared with plants grown from seed derived by crossing S. tuberosum with various, Andean frost resistant tuberbearing Solanum species. Biomass growth at optimal (20°/10°) and suboptimal (10°/4°) temperatures was studied.
Differences in increase of fresh and dry matter were found between populations of Andean and European orgins at 10°/4°. At 20°/10° no such differences were found.
At suboptimal temperature, Andean hybrids produced significantly more fresh and dry matter than European crosses in two harvests (64 and 178 days old plants). Statistically, Andean hybrids were found to produce the same amount of dry matter per day at both temperatures, over the complete growth period.
Height increase and flower development were strongly depressed in European crosses under the suboptimal temperatures, but much less so in Andean crosses.
The Andean material appears to be an under utilized resource in potato breeding for cool climates.
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Kristjansdottir, I.S. Influence of suboptimal temperature on biomass production of potato populations of Andean and European origin. Euphytica 44, 23–35 (1989). https://doi.org/10.1007/BF00022595
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DOI: https://doi.org/10.1007/BF00022595