ABSTRACT.


Pablo Alvarado V.1 y René Cortázar S.2
 

A system of diallel crossing with seven tomato varieties was prepared and established under green-house conditions at La Platina Experiment Station during 1967-1968. The purpose was to determine the relative importance of general and specific combining ability and the type of gene action involved in yield, number of fruits per plant and average fruit weinght.
Date were analized by the randomized block design, averages were compared by Duncan's Multiple Range Test, and the study of the combining ability was made by Griffing's experimental method Nº 4, model I.

Keywords:
1Ing. Agr., Mag. Departamento de Producción Agrícola, Facultad de Agronomía de la Universidad de Chile. Profesor Auxiliar de Horticultura y Genética de la Escuela de Agronomía, Universidad de Chile. Casilla 1004, Santiago, Chile.
2Ing. Agr., Ph. D., Coordinador Línea Fitotecnia, Estación Experimental La Platina, Instituto de Investigaciones Agropecuarias, Profesor de las Cátedras de Genética y Mejoramiento Vegeetal, Facultad de Agronomía, Universidad de Chile y Universidad Católica de Chile.