Abstract
The effects of seasonal high temperatures on potatoes were investigated under field conditions near Peshawar, Pakistan. Five potato clones (A79196-1, Desiree, DTO-28, LT-1, Russet Burbank) were grown during the spring season at two locations. Canopy development, vine dry weight and tuber dry weight were determined at 13-day intervals, starting 68 days after planting (DAP). Tuber yield was higher in heat tolerant clones compared to heat susceptible clones. Location significantly affected tuber dry weights. Tuber dry weights of Russet Burbank were consistently lower than those of DTO-28. Ground canopy cover of DTO-28 occurred earlier and reached maximum at 75 DAP, compared to 90 DAP for Desiree. DTO-28, because of its high tuber yield under cool as well as hot temperatures, and its relatively early bulking, should be a promising clone for a short duration crop in hotter regions.
Compendio
Se investigó el efecto de las altas temperaturas de estación sobre plantas de papa en condiciones de campo, cerca de Peshawar, Pakistan. Durante la estación primaveral se sembraron cinco clones de papa (A79196-1, Desiree, DTO-28, LT-1, Russet Burbank) en dos localidades. Se determinó el desarrollo del follaje, el peso seco de las ramas y de los tubérculos, a intervalos de 13 días a partir de los 68 días después de la siembra (DAP). El rendimiento fue más alto en clones tolerantes al calor que en clones susceptibles al calor. La localidad afectó en forma significativa al peso seco de los tubérculos. El peso seco de los tubérculos de Russet Burbank fue menor, de manera consistente, que el de los tubérculos de DTO-28. El follaje cubrió el campo más temprano en el clon DTO-28, alcanzando su punto máximo a los 75 DAP, comparado con 90 días para Desiree. El clon DTO-28 puede ser promisorio para cultivos de corta duración en regiones mas cálidas, debido a su alto rendimiento en condiciones tanto frías como calientes y a su desarrollo relativamente precoz.
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Approved for publication by the Director of the Idaho Agric. Expt. Station as research paper No. 90732. Supported in part by USDA/BARD research grant No. US-994-85. This work done in partial fulfillment of the requirements for the Ph.D. degree at the University of Idaho.
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Malik, N.J., Dwelle, R.B., Thornton, M.K. et al. Dry matter accumulation in potato clones under seasonal high temperature conditions in Pakistan. American Potato Journal 69, 667–676 (1992). https://doi.org/10.1007/BF02852679
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DOI: https://doi.org/10.1007/BF02852679