Abstract
The inheritance of tuber shape was studied by developing and/or selecting clones from a cultivated diploid potato breeding program. Progeny analyses indicated that one major gene controls the round and long shapes. Round is dominant over long. The gene symbol Ro, earlier proposed by Masson, is accepted. All three possible genotypes, RoRo, Roro and roro were identified. Ro was found to be linked with I, a previously described gene which controls the expression of anthocyanin in the tuber skin. In nearly all genotypes studied the linkage was in the coupling phase; however, one parent was identified where the linkage was in the repulsion phase. The recombination frequency between Ro and I was found to be approximately 11.8%. The implication of linkage between tuber skin color and shape is discussed.
Compendio
Se estudió la herencia de la forma de tubérculo desarrollando y/o seleccionando clones de un programa de mejoramiento de papa cultivada diploide. El análisis de la progenie indicó que un gene principal controla las formas redonda y alargarda. La forma redonda es dominante sobre la alargada. Se aceptaRo como el símbolo del gene, de acuerdo a lo propuesto anteriormente por Masson. Se identificaron los tres posibles genotipos,RoRo, Roro, y roro. Se encontró queRo estaba ligado conI, un gene descrito anteriormente como el que controla la distribución de antocianina en la piel del tubérculo. En casi todos los genotipos estudiados el ligamiento se encontraba en la fase de apareamiento. Sin embargo, se identificó un progenitor donde el ligamiento se encontraba en la fase de repulsión. Se encontró que la frecuencia de recombinatión entreRo eI fue aproximadamente de 11.8%. Se discute la implicancia del ligamiento entre el color de la piel del tubérculo y la forma del mismo.
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De Jong, H., Burns, V.J. Inheritance of tuber shape in cultivated diploid potatoes. American Potato Journal 70, 267–284 (1993). https://doi.org/10.1007/BF02849314
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DOI: https://doi.org/10.1007/BF02849314