Microsatellite markers reveal low breeding system efficacy and pollen contamination can limit production of full-sib avocado progeny

Outcrossing Rate and Genetic Variability in Mexican Race Avocado

“…Molecular markers in avocado have been used to assess genetic diversity among and within racial groups (Boza et al, 2018;Cuiris-P erez et al, 2009;Gross-German and Viruel, 2013), in phylogenetic studies (Ashworth and Clegg, 2003;Reyes-Alem an et al, 2013), and in construct linkage maps ; to identify quantitative trait loci (Sharon et al, 1998), and in outcrossing studies (Alcaraz and Hormaza, 2011;Borrone et al, 2008;Chen et al, 2007;Garner et al, 2008;Kobayashi et al, 2000;Schnell et al, 2009;Violi et al, 2009). Outcrossing rate studies based on molecular markers have been done in different plant species such as Brassica carinata A. Braun (Teklewold et al, 2013), Foeniculum vulgare Mill.…”

“…In avocado, most outcrossing studies have been done in cultivars such as Hass, Bacon, Zutano, and others (Kobayashi et al, 2000;Schnell et al, 2009) to detect potential donors of pollen and to calculate the correlation between outcrossing and yield (Kobayashi et al, 2000), to determine the incidence and effectiveness of self-and cross-pollinated avocado fruit (Davenport et al, 2006), and to assess the relation among outcrossing rate with yield and alternate bearing (Garner et al, 2008). In addition, the outcrossing rate has been used to assess the proportion of progeny resulting from parents with complementary blooming (Borrone et al, 2008;Violi et al, 2009) and to determine whether an outcrossed progeny is more tolerant to Phytophthora root rot than a self-pollination progeny ). However, the outcrossing rate results presented in all studies show variation according to location, tree distribution within orchards, and genotypes used as potential pollen donors.…”