Outcrossing rate in adjacent ‘Maya’ and ‘Tommy Atkins’ mango blocks

Outcrossing rate between 'Haden' and 'Tommy Atkins' mangoes estimated using microsatellite and AFLP markers

“…Multilocus outcrossing rates estimated in the present study, ranging from 85 to 87% with seven AFLP markers and from 83 to 91% with three microsatellite primers, were close to those estimated by Degani et al (1997), of 0.79 between 'Maya' and 'Tommy Atkins'. A segregation rate of 3:1 was observed with AFLP markers and two microsatellite markers as heterozygotes in both parents, corroborating the high heterozygosity expected for mango.…”

“…The outcrossing estimates obtained in the present study and by Degani et al (1997) indicate that mango is a predominantly open pollinated species and that biometrical models applied to mangoes should take into account the deviation from random outcrossing to estimate genetic parameters and the constitution of broad germplasm samples to preserve the genetic variability of the species, as recommended by Freitas et al (2004), while evaluating Myracrodruon urundeuva.…”

“…Therefore, no strange or foreign alleles were observed by AFLP (Figure 1) and microsatellite profiles (Figure 2). Degani et al (1997) and Dag et al (2009), who evaluated pollen dispersion on mango as far as 108 m in Israel, found a substantial reduction in the outcrossing rate between orchards of 'Maya' and 'Tommy Atkins'.…”

“…Degani et al (1997), in a pioneer and isolated study, estimated the outcrossing rate between 'Maya' and 'Tommy Atkins' mangoes, using isozymes. For Pinto et al (2002), mango pollinization is critical for monoembryonic or Indian cultivars, since they are the basis of commercial orchards in Brazil, unlike polyembryonic or Filipino cultivars, which produce non-zygotic or maternal embryos.…”

Delayed self-incompatibility causes morphological alterations and crop reduction in ‘Ataúlfo’ mango (Mangifera indicaL.)

“…Our results shown in Figure 2 indicate that in 'Atau´lfo' mango, out-crossing is favoured over self-crossing, a situation reported by Degani et al (1997) who found 'substantial' out-crossing rates and an unexpectedly high hybrid fruit production in 'Tommy Atkins' and 'Maya', suggesting the existence of self-incompatibility and a genetic selection favouring outcrossed fruits. Dag et al (1997) obtained similar results using 'Tommy Atkins' pollen as an out-crossing agent for pollinating 'Lily' mangoes.…”