Taxonomic Review of the Genus Echinochloa in Korea (II): Inferred from Simple Sequence Repeats

• DOI: 10.5660/wts.2014.3.3.190
• Publication Date: 2014-11-11T05:22:18Z
• Authors: Jeongran Lee; Chang-Seok Kim; In-Yong Lee
• Keywords: Echinochloa crus-galli; Noxious weed; Dominance (genetics)

The genus Echinochloa (L.) P. Beauv. is a very difficult due to many interspecific and intraspecific forms found in the nature. This still taxonomically controversial absence of reliable morphological characters, resulting poor taxonomic understanding genus. It has approximately 3040 species, mainly distributed tropical warm temperate regions, usually associated with wet or damp places, world (Clayton Renvoize, 1999). includes some noxious weeds, such as E. crusgalli Beauv., oryzicola Vasinger, colona Link agricultural areas world. dominance these species causes serious yield loss if they are not appropriately controlled fields (Hill et al., 1985). two crus-galli problematic weeds Korean well. agronomists confused about identifying this using characters because only exhibits diverse ecological types, but also several varieties var. echinata (Willd.) A. Chev. praticola Ohwi. However, varieties, praticola, have been treated synonyms depending on taxonomists (The Plant List, 2014). known that eight taxa genus, crus-galli, echinata, oryzicola, colona, glabrescens Munro ex Hook.f., oryzoides (Ard.) Fritsch, esculenta (A.Braun) H.Scholz, throughout Korea (Lee 2013). grows upland paddy whereas frequently fields. These whole country. Existence Korea, however, should be reexamined. result previous study showed collected from was clustered crus-galli. They were China and/or formed independent clade (in press). continuous use herbicides which same ABSTRACT. causing when dominant Identification found. it important identify exactly know genetic diversity for effective weed management. conducted summarize by comparing variation relationship among SSR. 107 individuals, including seven assessed five SSR markers. UPGMA dendrogram generated clades (I II) II divided again into subclades (II-1 II-2) model based structure proposed four subpopulations. subpopulations corresponded I II-1 other arranged II-2 dendrogram. We concluded might Korea. biological summarized i.e., esculenta, oryzoides.