Performances of true potato seed families derived from intermating tetraploid parental lines

Abstract

Four different sets of true potato seed (TPS) families, representing a total of 262 hybrids derived from intermating tetraploid clones were evaluated in three different locations in Peru. Significant differences were observed among families in tuber yield, uniformity and transplant survival rate in the field. Several families produced an average tuber yield of more than 1.0 kg per plant, with a tuber uniformity of some families approaching that of standard varieties. Hybrid TPS families gave higher tuber yields and more uniform tubers than families from open-pollination. On the basis of an observed family-environment interaction for tuber yield, it is suggested that locally adapted cultivars or advanced selections should be used as parents to generate TPS progenies for specific areas.

Resumen

Cuatro grupos diferentes de familias de semilla botánica de papa representando un total de 262 híbridos derivados de cruzas entre clones tetraploides fueron evaluados en tres localidades diferentes en Perú. Se observo diferencias significativas entre familias para rendimiento de tubérculos, uniformidad y porcentaje de supervivencia de las plantulas en el campo. Varias familias produjeron un rendimiento promedio de tubérculos mayor a 1 kg por planta. Ademas, los tubérculos de algunas familias exhibieron una uniformidad similar a aquella de variedades estandar. Las familias híbridas provenientes de semilla botánica de papa tuvieron mayor rendimiento y mayor uniformidad de tubérculos que las familias provenientes de polinizacíon libre. En base a la interaccíon familia-ambiente observada para rendimiento de tubérculos, se sugiere que cultivares locales adaptados debieran ser usados como progenitores para generar progenies de semilla botánica de papa para areas específicas.