EVALUATION OF GENETIC DIVERSITY IN ACACIA MANGIUM CLONAL SEED ORCHARDS BY USING MICROSATELLITE MARKERS
Keywords:
Acacia mangium,, Genetic diversity,, Microsatellite markers,, Clonal seed orchardAbstract
Simple-sequence-repeat (SSR) markers were used to assess the genetic diversity of 100 clones of A.
mangium growing in clonal seed orchards (CSO) at Ba Vi and Cau Hai.
The mean expected and observed heterozygosities were 0.437 and 0.495 respectively. The average
number of alleles observed with each marker was 3.078 against while the expected number of
2.731. As heterozygosity was greater than expected, there was limited evidence of inbreeding in
these orchards.
The actual rate of inbreeding was about 14% and using that genetic information it was possible to
assign the eight provenances present in the CSOs, into 4 groups: one containing five provenances
(Wipin, Cardwell SO, Claudie River, Derideri, Kini) and three containing only one provenance
each. We believe these orchards, which contain 100 clones of A. mangium, have sufficient genetic
diversity and potential for outcrossing to be suitable for seed production.
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