ESTIMASI LAJU PERKAWINAN SILANG PADA Toona sinensis Roem DENGAN PENANDA RAPD (Random Amplified Piolymorphic DNA)

Abstract

Toona sinensis Roem or surian, belongs to the family Meliaceae. It is very important Indonesia community forest tree species because of it excellent wood quality and medicinal properties. The study investigated the mating system of T. sinensis. T. sinensis base on 88 polymorphic band Random Amplified Polymorphic DNA (RAPD) of 200 tree sample. Origin of geographical location and materials used in this research from Enrekang seed stand identified population, South Sulawesi Province. The mating parameter estimated using the mix mating model showed that this population practice a mixture of mating model with multilocus outcrossing rate (t m) was 0.938, meaning that the total of outcrossing that can be among relative individual or not. The singlelocus outcrossing rate (t s) was 0.765, meaning that most outcrossing occurred among non-relative tree than among relative ones (t m-t m)= 0,172. Highest value was obtained for correlation of selfing among families (0.999±0.045), but low value obtained for correlation paternity multilocus (0.076±0.016) and correlation paternity singlelocus (-0.002±0.062). Maternal inbreeding coefficient (F m)was0.032, meaning high category. From inbreed crossing 0,062 (s=1-t m) was because selfing. Therefore we can concluded that T. sinensis is low tolerance of selfing. These result have important implication to establish strategies of genetic breeding strategic of surian.