دانلود رایگان مقاله لاتین محدودیت ژنتیکی و ساختار جمعیت از سایت الزویر
عنوان فارسی مقاله:
محدودیت های ژنتیکی و ساختار جمعیت سه تاکسون Trapa از رودخانه یانگ تسه، چین
عنوان انگلیسی مقاله:
Genetic delimitation and population structure of three Trapa taxa from the Yangtze River, China
سال انتشار : 2017
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مقدمه انگلیسی مقاله:
1. Introduction
Trapa L. (Trapaceae), known as water chestnut, is a genus of annual floating-leaved aquatic plants widely distributed in subtropical and temperate regions of Africa, Asia, and Europe and was introduced into Australia and North America (Chen et al., 2007). Its seeds are important food for humans and animals in East and Southeast Asia due to the high content of starch (Suriyagoda et al., 2007; Hoque et al., 2009). However, the taxonomy of the genus is extremely confusing world-wide because of the wide variability in morphological traits of the genus and the limited diagnostic characters (Yu, 1998; Kim et al., 2010). Cook summarized that the genus contained only one polymorphic or up to ca. 20 species in the world (Cook, 1990). The classification of Chinese Trapa is also problematic. Flora Republicae Popularis Sinicae documented 15 species and 11 varieties in the genus (Wan, 2000), while only two species were reported in its revised edition, the Flora of China (Chen et al., 2007). The confused situation has greatly hindered further genetic researches of the genus. As valuable food and natural resources, the genetic diversity of Trapa populations should be investigated in order to effectively conserve or manage them. However, previous genetic researches only focused on the classification of the genus (Bao et al., 2004; Jiang and Ding, 2004; Takano and Kadono, 2005; Kim et al., 2010), and few efforts have been made on the genetic diversity and population structure of Trapa populations. Trapa plants are common in northeastern and southern part of China, occurring in freshwater wetlands, sluggish reaches of rivers, lakes, ponds and estuaries (Wan, 2000; Chen et al., 2007). The plants have floating leaves and submersed ones. The floating leaves have spongy and swollen float in petioles, which allows the foliage to form a rosette on the surface of the water. The plants are capable of extensive clonal propagation (Groth et al., 1996). Additionally,
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کلمات کلیدی:
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