Analysis of genetic diversity in Eucalypts as basis for breeding program
Keywords:
Genetic diversity, genetic distance, E. camaldunens, E. urophylla,, E. exsertaAbstract
Thirty-four SSR primers was used to analyze genetic diversity of 19
parent trees of three Eucalyptus species to identify phylogenetic
relationships among trees of one species and trees in different species. This is the basis for selecting the most suitable hybrid parents. Genetic distances in 19 samples of three species of Eucalyptus in this study is [0.28; 3.882]. Genetic distances between the trees of E. camaldunensis is low (0.712), followed by E. urophylla at 0.836 and E. exserta at 1.183. Nineteen studied Eucalyptus samples was divided into two groups:
i) Group one is including E. exserta and E. camaldunensis, when their hybrid often grow slowly compared with reversible hybridization between E. urophylla with E. exserta and E.camaldunensis;
ii) Group two consists only E. urophylla. The high genetic diversity between trees in different species and in one species has more significant in breeding and hybridization. In conclusion, E. camaldunensis and E. exserta has close kinship than E. urophylla, therefore hybrid combinations of E. urophylla E. exserta are usually more dominant than reciprocal hybrid co mbinations
between E. camal with E. exserta.
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