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การประเมินการแพร่กระจายยีนของเต็ง (Dipterocarpaceae) พืชดัชนีสาคัญในป่าเต็งรัง (Estimation of Gene Flow of Shorea obtusa (Dipterocarpaceae), a Plant Keystone Species in Deciduous Dipterocarp Forest) |
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| รหัสดีโอไอ | |
| Creator | ชฎาพร เสนาคุณ |
| Title | การประเมินการแพร่กระจายยีนของเต็ง (Dipterocarpaceae) พืชดัชนีสาคัญในป่าเต็งรัง (Estimation of Gene Flow of Shorea obtusa (Dipterocarpaceae), a Plant Keystone Species in Deciduous Dipterocarp Forest) |
| Publisher | Genetics Society of Thailand |
| Publication Year | 2556 |
| Journal Title | Thai Journal of Genetics |
| Journal Vol. | S.1 |
| Journal No. | S1 (Special Issue 1) |
| Page no. | 414 |
| Keyword | microsatellite, gene flow, genetic relatedness, deciduous dipterocarp forest, Thailand |
| ISSN | 8578664 |
| Abstract | We investigated the fine-scale genetic structure of Teng (Shorea obtusa Wall. ex Blume) a keystone species in a deciduous dipterocarp forest, in Walai Rukhavaj Botanical Research Institute (WRBRI), Maha Sarakham, Thailand. The genotypes for 208 individuals, including 29 candidate parent trees and 179 seedlings of mother trees were tested based on five polymorphic microsatellite markers. The results showed high genetic diversity in populations of both parents (H e = 0.674) and offspring (H e = 0.547). The correlation between genetic relatedness and spatial distance among the 29 candidate parents within the population was significantly negatively correlated (r = -0.129, P<0.05). This implies that genetic structure in this area was low. Parentage analysis of seedlings within a 100-ha study site found that 10.9 % of the alleles detected probably originated from adult trees outside the WRBRI. The average effective distance of pollen dispersal (?) of maternal tree was 626.7 m. The effective number of pollen donor (Nep) for each maternal tree ranges from 3 to 12, with an average Nep of 6. We hypothesized that long distance gene flow and low density are responsible for the low genetic structuring of Teng in WRBRI. |
