Prospecting of tomato hybrids for table and industry via mixed modeling and multivariate analysis

Prospecção de híbridos de tomateiro para mesa e indústria via modelagem mista e análise multivariada

ABSTRACT

Dual-purpose tomato breeding, for table and industry, has great importance for tomato production and strong impact on Brazilian socioeconomic development. In the present study, we used the methodology of mixed models to estimate the combinatorial ability of five tomato lines evaluated in complete diallel scheme without reciprocal, and cluster analysis to prospect new double and triple hybrids constitutions. Thus, we observed that positive values of general combining ability occur in ‘B13LD’, ‘Viradoro’ and ‘Rio Grande’ (for fruit firmness), ‘B13LD’, ‘Castone’ and ‘Massag-72’ (for soluble solids content); and ‘Viradoro’ and ‘Rio Grande’ (for productivity). The crosses ‘B13LD x Rio Grande’ and ‘Massag-72 x Viradoro’ showed positive estimates of specific combination ability for soluble solids content, fruit firmness and productivity. The hybrid ‘B13LD x Rio Grande’ showed itself promising to be among those with the highest estimates of the genetic value of the cross for the three aforementioned traits. For the analysis of genetic divergence and estimate of combining ability it was possible to indicate two double and three triple hybrids.

Keywords:
Solanum lycopersicum; diallel analysis; productivity; plant breeding.