Efecto de una generación de endocría sobre caracteres vegetativos y productivos en dos estructuras familiares de alcaucil

CRAVERO, V.P.; LÓPEZ ANIDO, F.S.; COINTRY, E.L.

HORTICULTURA BRASILEIRA

Año: 2002 vol. 20 p. 459 - 464

0102-0536

Globe artichoke (Cynara scolymus L.) is an allogamous species where vegetative propagated cultivars are not suitable for seed multiplication due to their high heterozigous condition. To obtain homogeneous materials, the inbreeding process is necessary. Inbred lines could be used as cultivars or in hybrid combinations. The effect of one generation of selfing over vegetative and productive traits were evaluated. The Genetic Determination Coefficient was estimated in two different family structures. Two sets of SI families were originated: one from crosses between dones and the other through open pollination of the same dones. These assays were implanted in the field, in Zavalla, Argentina. The vegetative and reproductive characters were evaluated in a single planto The importance of the starting material to obtain lines with adequate agronomic performance was demonstrated: SI families originated from half-sib plants presented a strong endogamic depression in the majority ofthe traits in comparison to those obtained from full-sibs. Although all characters manifested endogamic depression after one generation of selfing, a genetic variability still remained among sets, among families and plants within families. As a consequence, it could be possible to select elite plants to continue the inbreeding process or to be vegetatively propagated as dones.