|Title:||稻種原演化與環境適應性||Other Titles:||Diversification and Environmental Adaptation of Rice||Authors:||郭益全
|Keywords:||稻;半水生的一年生作物;稻屬;岡瓦納;亞洲種栽培稻;非洲種栽培稻;Rice;Semiaquatic annual plant;Oryza;Gondwana;O. sativa;O. glaberrima||Issue Date:||Jun-1999||Publisher:||臺灣省農業試驗所、中華農業氣象學會||Start page/Pages:||33-51||Source:||環境與稻作生產||Abstract:||
Rice is generally considered a semiaquatic annual plant, although it could survive as a perennial in the tropics or subtropics. Taxonomically, rice belongs to the genus Oryza. The genus Oryza was probably originated about 130 million year ago in Gondwanaland and different species were distributed into different continents with breakup of Gondwanaland. Academically, there are two cultivated and twenty (or twenty-one) wild species of the genus Oryza. The Asian cultivated rice, 0. saliva, is grown all over the world. 0. glaberrima, the African cultivated rice, is grown on a small scale in West Africa. The cultivated species originated from a common ancestor with AA genome. A number of important morphological and physiological changes took place during the long history of cultivation and domestication. Furthermore, selection under diverse climate, edaphic environments and biotic stress frequently in geographically separated areas, dispersal of human to many geographic areas and adaptation to diverse environments have further diversified the genus Oryza and resulted in numerous cultivars. Rice is now grown between 53º to 40º latitudes. Valuable sources of useful traits, evaluated and identified from various rice stock including culitvated and wild species, are enumerated.
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