Abstract
Transformed Russet Burbank and Lemhi Russet clones which contained three different transgene constructs were evaluated for performance under field conditions in Idaho. The transgenic lines were characterized over two growing seasons, using plants grown from both greenhouse produced minitubers (first year) and field grown seed (second year). Individual clones were evaluated for a variety of agronomic and quality properties. Many of the transformed clones showed reduced yield and increases in percent malformed and undersized tubers. Other characteristics, such as specific gravity and fry color, showed less variability. The variation observed in non-transgenic clones regenerated from tissue culture was less than that of the transformed lines. Out of an original population of 57 transgenic lines in tissue culture, maintenance of key agronomic and quality properties of the parental material was observed in only four clones. These results suggest that experiments designed to generate transgenic lines for the marketplace should be initiated with a large number of transgenic clones.
Compendio
Clones transformados de Russet Burbank y Lemhi Russet, que contenían tres diferentes prototipos de transgenes fueron evaluados para comportamiento bajo condiciones de campo en Idaho. Las líneas transgénicas se caracterizaron en dos temporadas de cultivo, utilizando plantas obtenidas tanto de minituberculos producidos en invernadero (primer año) como semilla producida en el campo (segundo año). Se evaluaron clones individuales para diversas propiedades agronomicas y de calidad. Muchos de los clones transformados mostraron rendimientos reducidos y un incremento en el porcentaje de tubérculos deformesy de pequeño tamaño. Otras características, tales como la gravedad específica y el color a la fritura, mostraron una menor variabilidad. La variacíon observada en los clones no transgénicos regenerados de cultivo de tejidos fue menor que aquella de las líneas transformadas. De una población original de 57 líneas transgénicas en cultivo de tejidos, se observó que sólo cuatro de ellas mantenían las principales propiedades agronómicas y de calidad del material progenitor. Estos resultados sugieren que los experimentos diseñados para generar líneas transgenicas para el mercado deberán iniciarse con un gran número de clones transgenicos.
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Belknap, W.R., Corsini, D., Pavek, J.J. et al. Field performance of transgenic Russet Burbank and Lemhi Russet potatoes. American Potato Journal 71, 285–296 (1994). https://doi.org/10.1007/BF02849055
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DOI: https://doi.org/10.1007/BF02849055