SciELO - Scientific Electronic Library Online

vol.28 número1Efecto del régimen de defoliación sobre la producción de grano en trigo doble propósitoEficiencia en el uso de la radiación en papa estimada a partir de la cobertura del follaje índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados



  • No hay articulos citadosCitado por SciELO

Links relacionados

  • No hay articulos similaresSimilares en SciELO



versión On-line ISSN 1668-298X


AROLFO, V.; ODORIZZI, A.; BASIGALUP, D.  y  BALZARINI, M.. Validation of a selection technique for improving alfalfa forage yield based on inbreeding depression. Agriscientia [online]. 2011, vol.28, n.1, pp. 13-19. ISSN 1668-298X.

Rapid inbreeding depression in alfalfa is due to loss of intraallelic interactions in tri- and tetraallelic plants. These plants could be identified by using a S1 progeny test and then combined into a higher yielding synthetic variety. The objective of this study was to evaluate the usefulness of S1 progeny test to identify tri and tetraallelic genotypes. Three alfalfa synthetic experimental populations (PSE) were developed by applying three selection methods to an original plant population (PO). The first one, selected those plants whose S1 progenies exhibited higher inbreeding depression (≥65%) on forage production; the second one, selected the plants of the PO that did not produce S1 seed; the last one, consisted on traditional phenotypic selection of PO plants with higher forage yield (15% superior). The elite were manually intercrossed and harvested to produce PSE 1, 2 and 3, respectively. Accumulated forage yield was analyzed for each PSE and PO during the season. All the PSE produced more (p<0.05) than the PO; however, PSE 1 was no different from PSE 3. Data were also used to estimate variance components. The heritability (H) reached a value of 0.86.

Palabras clave : Medicago sativa; Inbreeding; Breeding; Forage yield.

        · resumen en Español     · texto en Español     · Español ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License