In situ and Ex situ Conservation of Commercial Tropical Trees - ITTO

281inbreeding. There is improved gain when trees in mildly inbred population areout-crossed.Table 5. The best 30 trees selected from multiple-tests for clonal seed orchardof G. arborea.Test ID Block Provenance Family Tree Index Gain Index % Genetic gain Ranking472901B 6 2 23 5 1.0811 0.0414 50.07% 1473301E1 1 2 22 1 1.0516 0.0403 48.70% 2473301E3 2 2 23 1 1.0474 0.0401 48.51% 3473101C 5 2 27 1 1.0041 0.0385 46.50% 4470201G 4 2 23 6 0.9597 0.0368 44.44% 5470201G 4 2 23 3 0.9581 0.0367 44.37% 6472901B 6 2 23 3 0.9497 0.0364 43.98% 7473101C 6 2 40 5 0.9244 0.0354 42.81% 8473301E3 3 2 27 4 0.9237 0.0354 42.78% 9473101C 2 1 5 6 0.8764 0.0336 40.59% 10473101C 7 2 27 2 0.8547 0.0327 39.58% 11473101C 1 2 27 6 0.8369 0.0321 38.76% 12473101C 8 2 40 6 0.8247 0.0316 38.20% 13473101C 3 2 27 6 0.8186 0.0314 37.91% 14470201G 1 2 31 3 0.8105 0.031 37.53% 15473101C 5 2 28 2 0.8088 0.031 37.46% 16470201G 2 1 3 3 0.7974 0.0305 36.93% 17473101C 3 2 40 2 0.7926 0.0304 36.71% 18472901B 9 2 36 1 0.7909 0.0303 36.63% 19472901B 2 2 28 6 0.7864 0.0301 36.42% 20473301E3 6 1 4 2 0.7674 0.0294 35.54% 21473101C 4 1 17 2 0.761 0.0291 35.24% 22473101C 7 1 14 1 0.7534 0.0289 34.89% 23473101C 2 2 28 2 0.7531 0.0288 34.88% 24473101C 8 1 4 6 0.7442 0.0285 34.46% 25473101C 9 1 5 5 0.7431 0.0285 34.42% 26473101C 3 2 28 5 0.7378 0.0283 34.17% 27472901B 3 2 28 2 0.724 0.0277 33.53% 28473101C 7 1 10 5 0.7212 0.0276 33.40% 29472901B 3 1 3 1 0.7071 0.0271 32.75% 30Average gain : 39.07%