Abstract

MARTINEZ-SOLIS, Juan et al. Intervarietal heterosis in saladette tomato (Solanum lycopersicum L.). Rev. Chapingo Ser.Hortic [online]. 2013, vol.19, n.4, pp.5-21. ISSN 2007-4034.

In order to evaluate the usefulness of tomato hybrids as potential progenitors for a breeding program, two 5 x 5 diallel designs (Griffing II) were developed using two types of saladette tomato: determinate and indeterminate growth habits. For fruit weight per plant (FW), the determinate growth habit hybrid DG05 showed good specific combining ability (SCA) and high intervarietal heterosis (IH), while DG03 hybrid had high general combining ability (GCA); therefore, both hybrids have good potential for use as foundation parents in hybridization and selection breeding programs, respectively. For the saladette indeterminate growth habit type, IG01 and IG04 hybrids showed the highest GCA values in addition to good SCA between them for FW; therefore, they could be used for both selection and hybridization breeding programs.

Keywords : Diallel designs; combining ability; plant breeding; crosses; specific heterosis.