Teak fruit: Size and some characteristics related to the number of seeds

Choldumrongkul, A.; Kittibanpacha, S. . Forest Research Office. Silviculture Research Division

Teak fruit: Size and some characteristics related to the number of seeds

1999

Choldumrongkul, A. | Kittibanpacha, S. (Royal Forest Department, Bangkok (Thailand). Forest Research Office. Silviculture Research Division)

Study on size and some characteristics of teak (Tectona gradndis L.f.) fruit related to the number of seeds was held at Mae Tha seed orchard, Mae Tha district, Lampang province and seed laboratory, Royal Forest Department, Bangkok. Nine plus trees of 25 years old were selected and fruits from 4 diffrent directions as North, South, East and West were collected in January 1999. Weight and number of fruits were weighed and counted in the filed after cleaning. Samples of 240 fruits from each direction per tree were measured in two dimensions of diameter and height of fruit. X-ray technique was used for examination the number of seed containing. ANOVA was used to analyze the size among different directions. Percentage of all seed calsses (0-4 seeds/fruit) were compared among the size, form and shape of fruit. Ther were 1,521 fruits/tree and an average diameter was 13.03 mm with 0.52 gm/fruit. However, 1 kg of fruit contained 1,923 fruit with 34.24 percent were empty. There was no significantly difference among the size in all directions, but small size (8.78-11.73 mm) showed very high percentage of empty fruit at 50.76 percent in average and percentage declined in the large size. However, prolate form showed very high percentage of empty fruit with 55.95 percent, whereas spherical and oblate form showed lower percentage of empty fruit. The shape showed a little correlation with the number of seeds.

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