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題名 | Indirect Measurement of Gene Flow in Hosta Capitata (Liliaceae)=Hosta Capitata(百合科)基因流傳的間接測定 |
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作者 | Park,Ki Bae; Chung,Myong Gi; |
期刊 | Botanical Bulletin of Academia Sinica |
出版日期 | 19971000 |
卷期 | 38:4 1997.10[民86.10] |
頁次 | 頁267-272 |
分類號 | 374.3 |
語文 | eng |
關鍵詞 | 基因流傳; 基因漂變; 傳粉者; 種子散播; Gene flow; Genetic drift; Hosta capitata; Pollinators; Seed dispersal; |
中文摘要 | 本研究探討 Hosta capitata 植物兩個天然族群之最小鄰域距離,傳粉者飛行距 離,及種子散播距離,據以間接估算此物種之鄰域面積及族群大小。正如大多數的昆蟲傳粉 植物,上述三項變數的頻度及分佈顯示有明顯之偏斜及集中分佈情形。傳粉者(熊蜂及蜜蜂 )之平均飛行距離及 H. capitata 種子散播距離大約分別為 1m 及 25cm。此外,雖然此二 族鄰域大小不同(大約分別為 15 及 64 個體),鄰域面積亦異( 5.68 到 17.13m �插^, 這些結果顯示其基因流傳明顯地受到空間的限制。本研究與過去研究顯示以同功酵素為遺傳 標誌從事 H. capitata 族群內及族群間精密的或大規模的遺傳結構探討, 強烈顯示基因流 傳受到相當程度之限制,而使隨機的影響扮演了決定此一物種遺傳結構的重要角色。 |
英文摘要 | We investigated the nearest neighbor distances between plants, pollinator flight distances, and seed dispersal distances in two natural populations of Hosta capitata to estimate indirectly the neighborhood area and size of this species. As with most insect-pollinated species, the frequencies and shapes of all three variables showed significant skewness and leptokurtosis. Means of pollinator (bumblebees and Apis) flight distances and seed dispersal distances of H. capitata were about 1 m and 25 cm, respectively. In addition, although neighborhood sizes differed (ca. 15 and 64 individuals), as did neighborhood areas (5.86 to 17.13 m �� ), between the two populations, these results indicated substantial spatial restriction of gene flow within them. The present results in conjunction with previous studies on fine and large scale genetic structure using allozymes as genetic markers within and among populations of H. capitata strongly indicate that gene flow is sufficiently restricted to allow stochastic effects to play an important role in determining the genetic structure of this species. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。