ISHS Acta Horticulturae 726: IV International Symposium on Pistachios and Almonds
INBREEDING EFFECTS ON SELF-COMPATIBILITY TRANSMISSION AND EXPRESSION IN ALMOND |
| Authors: | J.M. Alonso, R. Socias i Company |
| Keywords: | Prunus amygdalus, pollen tube growth, S-alleles |
| Abstract:
Inbreeding is expected in an obligate outcrosser as almond is. Inbreeding symptoms have appeared in several breeding offspring, as a consequence of the utilization of a reduced number of genotypes as parents in the breeding programmes and of crosses between related parents, including backcrosses, crosses between full sibs and half sibs, and from selfing self-compatible cultivars. The study of self-compatibility transmission and expression in four families obtained by crossing “Tuono” with “Ferragnès” and “Ferralise” in both ways of the cross have shown that the inbreeding present in “Ferralise” has reduced the number of self-compatible seedlings in its progeny as well as the phenotypic expression of self-compatibility in some seedlings possessing the Sf allele, showing an incompatible pattern of pollen tube growth after selfing. | |
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