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題名 | Morphological and RAPD Analysis of the Dominant Species Stipa Krylovii Roshev. in Inner Mongolia Steppe=內蒙古草原優勢植物克氏針茅的形態和RAPD分析 |
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作 者 | 王金龍; 高玉葆; 趙念席; 任安芝; 阮維斌; 陳磊; 劉景玲; 李長林; | 書刊名 | Botanical Studies |
卷期 | 47:1 民95.01 |
頁次 | 頁23-35 |
分類號 | 377.2124 |
關鍵詞 | 氣候因子; 遺傳變異; 地理距離; Mantel檢驗; 數量性狀; 克氏針茅; Climatic factors; Genetic variation; Geographic distance; Mantel test; Quantitative traits; RAPD; Stipa krylovii roshev.; |
語文 | 英文(English) |
中文摘要 | 克氏針茅(Stipa krylovii Roshev.)是內蒙古草原一種重要的多年生叢生禾草。它分佈面積廣,具有重要的經濟和生態價值。本文以其分佈區內五個典型樣地的自然種群為研究對象,分析了克氏針茅種群的數量性狀變異和RAPD變異,並利用Mantel檢驗分析了形態變異與RAPD變異,以及這兩種變異分別與種群間的地理距離以及氣候分異之間的相關關係。五個種群的形態數量性狀和RAPD分子標記結果都表明克氏針茅種群間分化明顯;兩種方法所得克氏針茅種群間的分化均與地理距離之間不存在顯著的相關關係,但與氣候分異之間相關顯著。這些結果表明克氏針茅種群間的分化不符合“地理-隔離模型”,而主要受當地氣候因子分異的影響。這不僅為決策者制定北方草原保護措施提供有用的信息,同時也為克氏針茅這一重要物種的種質資源保護提供基礎資料。 |
英文摘要 | Stipa krylovii Roshev. is an important perennial tussock grass in the Inner Mongolian steppe. It is found over a large area and has considerable ecological and economic importance. In the present study, five natural populations of S. krylovii were selected from their typical habitats to study the quantitative trait variation (samples from the natural populations) and RAPD variation. The relationships between quantitative trait variation and RAPD variation, and between either variation and geographic distance and then climatic factors were estimated using Mantel tests. Stipa krylovii populations showed differentiation in morphological and RAPD characters, yet no significant relationship existed between genetic variations estimated by morphological and RAPD characters and geographic distance, but both variations were closely associated with the climatic variation. These results indicated that the populational differentiation of S. krylovii was not in accord with the model of Isolation-by-distance, but was affected mainly by local climatic factors. Such information would be useful for conservation managers working out an effective strategy to protect this important species and provide the basis for a germplasm collection of it. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。