抄録
Eighty eight Sein Ta Lone mango individuals from five Sein Ta Lone orchards (populations), namely, Mya Na De, Htone Bo, Se Bauk, Taik Kyi, and Nam Latt, and 100 years old plant as control, and a landrace of Yin Kwe individual, a total of 89 individuals, were genotyped using 38 polymorphic markers showed 147 alleles with an average of 3.87 alleles per locus. Polymorphic information content varied from 0.02 to 0.83 and averaged of 0.37.Twenty four loci were Sein Ta Lone unique markers. Cluster analysis depicted those SP4 plant individuals from Se Bauk stand as an out-group from the rest of Sein Ta Lone individuals which scattered independently from their locations. Principal coordinate analysis confirmed grouping of Sein Ta Lone individuals closely to control Sein Ta Lone (100 years old) rather than Yin Kwe variety, and the first three principal coordinates explained 62.05% of total variation. Analysis of molecular variance explained 75% of genetic variation occurred within populations and 25% among populations. The fixation index (Fst) 0.63, pointed the high level of genetic differentiation among populations, it might be due to Yin Kwe control rather than five Sein Ta Lone populations. Limited gene flow (Nm = 0.31) occurred among the populations. Almost the same value (0.32 to 0.35) of the expected heterozygosity and the observed heterozgosity (0.16) were observed in Sein Ta Lone populations. The number of effective alleles varied from 1.88 to 2.13, Shannon Index ranged from 0.54 to 0.61, and same positive fixation index of (0.4), same value of the percentage of polymorphic loci (52.63%). Pairwise Nei genetic identity showed higher value to Sein Ta Lone control (100 years old), highest among five populations ranged from 0.916 to 0.957.
