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The lulo (Solanum quitoense Lam.) is a fruit of great importance for the development of fruit growing in the natural Andean region of Colombia; however, its cultivation presents a low technological development, possibly due to the scarce supply of improved cultivars that respond to the abiotic and biotic limitations that occur in the productive systems of Colombia. The objective was to evaluate the agronomic behavior of the yield and fruit quality of 50 half-brother families of lulo formed from a stratified selection scheme, in four localities of the department of Nariño, Colombia. The design of Complete Random Blocks with three repetitions was used; each repetition was made up of four plants for a total of 600 experimental units per municipality. The evaluated variables were yield (RTO), loss of fruits by Neoleucinodes elegantalis, fruit weight (PF), equatorial and polar diameter, juice content (CJ), total soluble solids (SST), titratable acidity (AC), index of maturity (IM), pH, pulp plus seed weight (PPS) and seed weight (PS). The best-behaving families corresponded to FMH28 and FMH22 for the municipality of Arboleda, FMH1, FMH7 and FMH25 for the municipality of San Pedro de Cartago and FMH28, FMH4, FMH36 and FMH29 for the municipality of Tangua, which had returns of 6, 86 to 15.81t.ha-1, a PF between 53.80 to 90.46g and SST between 9.11 to 11.70 ° Bx. These values exceeded the averages of the population evaluated by 45.5% for RTO, for PF in 11.41% and for SST in 10.50%.

Evaluación agronómica de familias de medios hermanos de lulo de Castilla, Solanum quitoense Lam.