Efecto de una generación de selección sobre caracteres productivos en una poblacion de alcachofa.

CRAVERO, V.P; COINTRY, E.L.; LÓPEZ ANIDO, F.S.; ASPRELLI, P.D Y GARCIA, S.M.

Ciencia e Investigación Agraria

Año: 2003 vol. 30 p. 51 - 56

0304-5609

Selection response for productive characters in an open pollinated populatism of globe artichoke and clones derived ofboth generations (Co and Cl) were evaluated. By means of multivariate analysis, elite plants of Co were selected and intercrossed to conform CI. Selected plants of Co and Cl were clonned and planted in a randomized complete block design with three replicates. Selection for marketable yield (42%) was related with increased total yield, head number (34%) and quality, but in turn associated to a slight reduction in mean head weight and mean bottom weight. Clones of CI showed an increment of 25% in total and marketable yield over those of Co' The selection gains for total marketable yield and head number are related to an additive gene action involved in the expression of these traits, however, for mean head weight the negative selection response is associated to non-additive gene effects.