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Inheritance of self-compatibility in almond: breeding strategies to assure self-compatibility in the progeny

AutorOrtega, Encarnación ; Dicenta, Federico
Palabras claveAlmond
Breeding methods
Prunus dulcis
Fecha de publicaciónmar-2003
CitaciónTheoretical and Applied Genetics 106(5): 904-911 (2003)
ResumenTo assure self-compatibility in the progenies, three different crosses were conducted for the first time in an almond breeding programme: self-pollination (266 descendants from 30 families), crosses between parents sharing an S-allele (108 descendants from five families) and crosses with homozygous self-compatible parents (62 descendants from five families). Depending on the cross, self-compatibility in the progenies was determined by observing pollen tube growth (by means of fluorescence microscopy), stylar S-RNases analysis or allele-specific PCR. The results obtained fit with the accepted hypothesis of inheritance of self-compatibility and the three crossing strategies used ensured 100% of self-compatible descendants. These strategies increase the efficiency of the breeding programme and avoid the laborious task of evaluating this characteristic. From the breeding point of view, self-fertilisation and crosses between relatives tend to produce inbreeding. Furthermore, these methods reduce the possibilities of choosing the parental combination. The use of homozygous self-compatible parents does not have any of these disadvantages. As far as we know, this is the first time that allele-specific PCR has been used for early selection of self-compatible seedlings. The advantages and disadvantages of the three methodologies used to determine self-compatibility are discussed.
Descripción8 pages, 6 tables, 1 figure.
Versión del editorhttp://dx.doi.org/10.1007/s00122-002-1159-y
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