ISHS Acta Horticulturae 663: XI Eucarpia Symposium on Fruit Breeding and Genetics
COMPARATIVE MAPPING OF PRUNUS ARMENIACA, PRUNUS CERASIFERA X PRUNUS ARMENIACA AND PRUNUS REFERENCE MAP |
| Authors: | P. Lambert, M. Faurobert, E. Pelpoir, K. Moreau, J.L. Poëssel, J.M. Audergon |
| Keywords: | apricot, Myrobalan plum, rootstock, sharka, microsatellites, AFLP |
| Abstract:
Apricot and plum x apricot genetic linkage maps were constructed taking as a reference the almond ‘Texas’ x peach ‘Earlygold’ map (Joobeur et al., 1998; Aranzana et al., 2003) named ‘T x E’. The apricot mapping population was an intraspecific cross between ‘Polonais’ and ‘Stark Early Orange’. The plum x apricot mapping population (P. xdasycarpa) was issued from an interspecific cross between Myrobalan plum (Prunus cerasifera Ehrh.) and apricot (Prunus armeniaca L.). The apricot parent (A3923) was a hybrid between ‘Screara’ and ‘Stark Early Orange’ (clone A669). These populations are part of breeding programs which aim at creating new genotypes combining several important traits: mainly fruit quality traits and disease resistance including sharka for apricot cultivars, graft compatibility, and pest and disease resistance for rootstocks. Apricot and Myrobalan maps were constructed by selecting a set of codominant markers on the ‘T x E’ map and by adding dominant markers. A total of 232 markers were distributed in the Myrobalan and apricot ‘A3923’ maps and 251 in the integrated apricot map (‘P x S’). A set of common markers allowed anchoring of the 8 groups of the apricot maps (‘P x S’ and ‘A3923’) and 6 groups of the Myrobalan map to the homologous groups of the ‘T x E’ map and displayed a good colinearity. The remaining linkage group of the Myrobalan map was found to be composed of two linkage groups of the reference map. | |
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