been established as unique among north american varieties these techniques generally involve extracting proteins from the tuber and separating them electrophoretically 4 leaf characteristics observed fully developed leaves located in the middle one third of plant persons of ordinary skill in the art will recognize that when the term potato plant is used in the context of the present invention this also includes derivative varieties that retain the essential distinguishing characteristics of fl1889 such as a single gene converted plant of that variety or a transgenic derivative having one or more value added genes incorporated therein such as herbicide or pest resistance backcrossing methods can be used with the present invention to improve or introduce a characteristic into the variety the term backcrossing as used herein refers to the repeated crossing of a hybrid progeny back to the recurrent parents the parental potato plant which contributes the gene for the desired characteristic is termed the nonrecurrent or donor parent this terminology refers to the fact that the nonrecurrent parent is used one time in the backcross protocol and therefore does not recur the parental potato plant to which the gene or genes from the nonrecurrent parent are transferred is known as the recurrent parent as it is used for several rounds in the backcrossing protocol in a typical backcross protocol the original variety of interest recurrent parent is crossed to a second variety nonrecurrent parent that carries the single gene of interest to be transferred the resulting progeny from this cross are then crossed again to the recurrent parent and the process is repeated until a potato plant is obtained.