Abstract
Tembesu (Fagraea fragrans Roxb) is a local superior plant species in South Sumatra. The lots of use has resulted in a decrease in the potential of these plants in natural forests. The length for recycling of tembesu plants is problem in the cultivation of it. One of the ways to overcome this problem is by plant breeding. This study aimed to determine plant growth and genetic variation of 3 years old tembesu (Fagraea Fragrans ROXB) in KHDTK Kemampo, Kabupaten Banyuasin, South Sumatra Province. This study uses Incomplete Block Design with rows and columns, 55 families, 20 replications. The results showed that Provenan had no significant effect on all observed variables, while plant family had a very significant effect on plant height and stem diameter and significantly affected for tree volume. The highest average plant is found in family 20 is 4.79 m, the largest average diameter is found in family 35 is 7.02 cm, the largest average volume is found in family 35 is 0.0177 m3. For genetic parameters, the value of individual heritability was at a high level of 0.37 for plant height, and was at a moderate level for trunk diameter and tree volume, while the value of family heritability was at a high level of 0.65 for plant height variables and was at low levels for trunk diameter and tree volume. the genetic correlation between height and stem diameter has a high value, which is 0.67. Estimated genetic gain at the 5% selection level shows a fairly high value, namely 7.84% for plant height, 4.51% for stem diameter, and 36.62 for tree volume. Key words: Tembesu plant (Fagraea fragrans ROXB) 3 years old, progeny test, growth, genetic variation, evaluation
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