Route Analysis Through Filial Generations of Modern Varieties of Tomato (Solanum lycopersicum L.)

Resumen

Objective: To measure the efficiency of using advanced generations of some commercial tomato hybrids for small farmers and to identify the most important yield components associated with yield.

Design/Methodology/Approach: Seven saladette-type hybrids of indeterminate growth were evaluated, as well as their respective generations F₂s and F₃s under greenhouse conditions. The evaluation of the three generations was carried out during the 2013 agricultural cycle. Three harvests were made at 82, 94 and 136 days after transplanting. The experiment was a randomized complete block design, with 4 replications and 10 plants per replication.

Results: Results indicated that there were significant differences for a few traits in F₂ and F₃. Path analysis showed that the total number of fruits had the highest direct and indirect effects on yield through generations.

Limitations of the study/implications: The usefulness of advanced generations of tomato commercial hybrids would depend on the genetic background of the parental lines that take part in such as hybrids, as some hybrids would present high inbreeding depression depending on the genetic composition of their progenitors.

Findings/Conclusions: Advanced generations of ‘LORETO’, ‘CUAUHTÉMOC’ and ‘ESPARTACO’ could be used by the small growers since low values of inbreeding depression were observed in F₂ and F₃ families