Genetic mapping of Japanese plum
Eduardo Alano Vieira, Rubens Onofre Nodari, Adriana Cibele de Mesquita Dantas, Jean-Pierre Henri Joseph Ducroquet, Marco Dalbó, and Cristine Vanz Borges
Genetic linkage maps of two Japanese plum cultivars, Chatard and Santa Rosa, were constructed using the pseudo-testcross mapping strategy and AFLP markers. From the segregating population derived from a cross between these cultivars, 88 plants formed the mapping population, with segregating genes for several traits of agronomical interest, such as the reaction to plum leaf scald. The Chatard map contained 56 markers linked in 11 linkage groups, covering a distance of 905.5 cM with an average distance of 16.2 cM between markers. The map of cultivar Santa Rosa contained 84 markers linked in 14 groups covering a distance of 1349.6 cM and presenting an average distance of 16.1 cM between markers. The maps obtained in the present study can be considered a basic framework and will need to be saturated for a more widespread use in breeding programs for the species.