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      A Homoploid Hybrid Between Wild Vigna Species Found in a Limestone Karst

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          Abstract

          Genus Vigna comprise several domesticated species including cowpea and mungbean, and diverse wild species. We found an introgressive hybrid population derived from two wild species, Vigna umbellata and Vigna exilis, in Ratchaburi district, Thailand. The hybrid was morphologically similar to V. umbellata but habituated in a limestone rock mountain, which is usually dominated by V. exilis. Analyzing simple sequence repeat loci indicated the hybrid has undergone at least one round of backcross by V. umbellata. We found the hybrid acquired vigorous growth from V. umbellata and drought tolerance plus early flowering from V. exilis, and thus has taken over some habitats of V. exilis in limestone karsts. Given the wide crossability of V. umbellata, the hybrid can be a valuable genetic resource to improve drought tolerance of some domesticated species.

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          Most cited references17

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          Chlorophyll fluorescence--a practical guide.

          Chlorophyll fluorescence analysis has become one of the most powerful and widely used techniques available to plant physiologists and ecophysiologists. This review aims to provide an introduction for the novice into the methodology and applications of chlorophyll fluorescence. After a brief introduction into the theoretical background of the technique, the methodology and some of the technical pitfalls that can be encountered are explained. A selection of examples is then used to illustrate the types of information that fluorescence can provide.
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            Limestone Karsts of Southeast Asia: Imperiled Arks of Biodiversity

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              Hybridization of the Habitat

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                Author and article information

                Contributors
                Journal
                Front Plant Sci
                Front Plant Sci
                Front. Plant Sci.
                Frontiers in Plant Science
                Frontiers Media S.A.
                1664-462X
                01 December 2015
                2015
                : 6
                : 1050
                Affiliations
                [1] 1Genetic Resources Center, National Institute of Agrobiological Sciences Tsukuba, Japan
                [2] 2Department of International Agricultural Development, Tokyo University of Agriculture Tokyo, Japan
                [3] 3Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University Nakhon Pathom, Thailand
                Author notes

                Edited by: Jean-Philippe Vielle-Calzada, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico

                Reviewed by: Tao Sun, Stanford University, USA; Nidia Sanchez-Leon, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico

                *Correspondence: Ken Naito knaito@ 123456affrc.go.jp

                This article was submitted to Plant Genetics and Genomics, a section of the journal Frontiers in Plant Science

                Article
                10.3389/fpls.2015.01050
                4664699
                845b85c9-48da-46ea-b7aa-11ed1ae00362
                Copyright © 2015 Takahashi, Iseki, Kitazawa, Muto, Somta, Irie, Naito and Tomooka.

                This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

                History
                : 16 September 2015
                : 09 November 2015
                Page count
                Figures: 5, Tables: 5, Equations: 0, References: 30, Pages: 11, Words: 7037
                Funding
                Funded by: Japan Society for the Promotion of Science 10.13039/501100001691
                Award ID: 13J09808
                Award ID: 26850006
                Categories
                Plant Science
                Original Research

                Plant science & Botany
                genus vigna,wild crop relatives,genetic resource,drought tolerance,stress tolerance,homoploid hybrid speciation,introgressive hybridization,natural hybrid

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