Effect of low inputs and salinity on yield and quality – A 3 year study in virus-resistant tomato (Solanum lycopersicum L.) breeding lines and hybrids

•Low inputs produced a decline in quality traits and an increase in blossom-end rot incidence in De la pera tomatoes.•De la pera tomatoes grown under low input conditions showed better stability than Muchamiel.•Studied hybrids failed dramatically in low inputs, especially for yield parameters.•Salinity enhanced the fruit quality with no great effects in yield in both tomato types.•The introduction in homozygosis of the Ty-1 gene seems to affect some agronomic and quality traits.