台灣栽培種山藥田薯及懷山藥植株性狀之變異

Variation of Plant Characteristic of Cultivated Yam Dioscorea alata L. and D. Batatas decne in Taiwan

龔財立(Tsai-Li Kung) ； 吳詩都(Shu-Tu Wu) ； 曾富生(Fu-Sheng Thseng)

《桃園區農業改良場研究彙報》 39期 (1999/12) Pp. 18-29

摘要

本研究為瞭解台灣地區栽培種山藥種內之變異，調查植株外表性狀之差異，藉由收集系間之相似係數及分群分析之結果，探討其種內的變異情形。結果田薯（Dioscorea alala L.）臺灣收集系與美國收集系間有差異。全部收集系可分為3群，其中第三群編號A20-A33之收集系，外表性狀顯然與其它兩群之收集系不同。懷山藥（D. batatas Decne）臺灣收集系與日本收集系間無顯著差異，且相似性高，可能為相同品種群。選育栽培種需要再進行優良營養系之分離。

關鍵字

山藥 ； 植株性狀 ； 遺傳變異

並列摘要

The purpose of this study were to understand the intraspecific variation of cultivated yam in Taiwan. A cluster analysis based on 30 morphological characteristics grouped the 36 accessions of D. alata into 3 main clusters. Significant difference were detected among the clones of D. alata selected in Taiwan and in America. In the third cluster, yam bearing the code numbers from A20 to A33 were significantly different from other clusters.No significant difference was detected among the clones of D. batatas selected in Taiwan and Japan. The similarity coefficient were high among all accessions. It was probable that the accessions in Taiwan and those in Japan maybe of the same origin. For cultivation purpose is necessary to select elite clones of cultivated yam in Taiwan however.

並列關鍵字

Yam ； Plant characteristic ； Genetic variation