ISHS Acta Horticulturae 658: I International Symposium on Rootstocks for Deciduous Fruit Tree Species
HIGH MARKER DENSITY AROUND THE PEACH NEMATODE RESISTANCE GENES |
| Authors: | P. Arús, M. Mnejja, D. Esmenjaud, N. Bosselut, E. Dirlewanger |
| Keywords: | Prunus persica, marker-assisted selection, genetic maps, root-knot nematodes, Meloidogyne |
| Abstract:
Nematode (Meloidogyne spp.) resistance genes from peach (Prunus persica) origin have been detected by several research groups. The map position of the resistance genes (one or two linked genes) has been established in several inter- or intraspecific progenies. Using transferable markers, like RFLPs (restriction fragment length polymorphisms) or SSRs (simple-sequence repeats or microsatellites) located in the neighbourhood of the resistance genes, we have been able to place them on a saturated map constructed with an interspecific F2 progeny from the cross between almond ('Texas') and peach ('Earlygold'). All resistance genes were placed on linkage group 2 of this map. This group includes 59 transferable markers with a high density (1.1 cM/marker on average) meaning that markers tightly linked or flanking any gene mapping in this group can be found only with the current information. Strategies for the use of this information in breeding programs are discussed. | |
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