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A Critical Review of the Species and the Taxonomy of Malus Mill. in the World

Li Yunong(Southwest Agricultural University,Chongqing,Sichuan 630716)  
After review the history of the taxonomical research of genus Malus Mill.,mainly classified by plantmorphological characters and the research on the taxonomy of genus Malus Mill. by Chemitaxonomy,Enzym-taxonomy,Chromosometaxonomy and Pollen analysis,the author expressed his critical view on the past taxo-nomical system,and proposed his systematical scheme. The author believed that the quantity of the speciesof genus Malus should be reduced and incorporated, the Malus species is very polymorphous by its nature andthe species represent a complicated system of ecotyps and forms and varieties;
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