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      Isolation and Characterization of Microsatellite Markers in Brown Planthopper ( Nilaparvata lugens Stål)

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          Abstract

          Brown planthopper ( Nilaparvata lugens Stål) (Homoptera: Delphacidae) is an economically important pest on rice. In this study, 30 polymorphic microsatellite markers were developed from N. lugens genomic libraries using the method of Fast Isolation by AFLP of Sequence Containing Repeats (FIASCO). Polymorphism of each locus was detected in 48 individuals from two natural populations. These microsatellite loci revealed 2 to 18 alleles, and the expected and observed heterozygosities ranged from 0.042 to 0.937 and from 0.042 to 0.958, respectively. These markers will be useful for the future study of this agricultural pest in population genetics and molecular genetics.

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          Strategies for microsatellite isolation: a review.

          In the last few years microsatellites have become one of the most popular molecular markers used with applications in many different fields. High polymorphism and the relative ease of scoring represent the two major features that make microsatellites of large interest for many genetic studies. The major drawback of microsatellites is that they need to be isolated de novo from species that are being examined for the first time. The aim of the present paper is to review the various methods of microsatellite isolation described in the literature with the purpose of providing useful guidelines in making appropriate choices among the large number of currently available options. In addition, we propose a fast and easy protocol which is a combination of different published methods.
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            Occurrence of entomopathogenic fungi from agricultural and natural ecosystems in Saltillo, México, and their virulence towards thrips and whiteflies.

            Entomopathogenic fungi were collected from soil in four adjacent habitats (oak forest, agricultural soil, pine reforestation and chaparral habitat) in Saltillo, México using the insect bait method with Tenebrio molitor (L.) (Coleoptera: Tenebrionidae) larvae as bait. Overall, of the larvae exposed to soil, 171 (20%) hosted Beauveria bassiana (Balsamo) Vuillemin (Hypocreales: Cordycipitaceae), 25 (3%) hosted Metarhizium anisopliae (Metschnikoff) Sorokin (Hypocreales: Clavicipitaceae) and 1 (0.1%) hosted lsaria (=Paecilomyces) sp. (Hypocreales: Cordycipitaceae). B. bassiana was significantly more frequent on larvae exposed to oak forest soil. M. anisopliae was significantly more frequent on larvae exposed to agricultural soil. From the infected bait insects, 93 isolates of B. bassiana and 24 isolates of M. anisopliae were obtained. Strains were tested for their infectivity against Cuban laurel thrips, Gynaikothrips uzeli Zimmerman (Thysanoptera: Phlaeothripidae) and the greenhouse whitefly, Trialeurodes vaporariorum (Westwood) (Hemiptera: Aleyrodidae). B. bassiana isolates caused the highest mortality on thrips (some causing 88% mortality after 6 days); both fungal species caused similarly high mortality levels against whiteflies (75%) after 6 days. Large amounts of germplasm of entomopathogenic fungi, fundamentally B. bassiana and M. anisopliae, exist in the habitats sampled; pathogenicity varied among strains, and some strains possessed significant virulence. Soils in these habitats are reservoirs of diverse strains with potential for use in biocontrol.
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              Polymorphism revealed by simple sequence repeats

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                Author and article information

                Journal
                Int J Mol Sci
                Int J Mol Sci
                ijms
                International Journal of Molecular Sciences
                Molecular Diversity Preservation International (MDPI)
                1422-0067
                2012
                27 July 2012
                : 13
                : 8
                : 9527-9533
                Affiliations
                State Key Laboratory of Hybrid Rice, College of Life Science, Wuhan University, Wuhan 430072, Hubei Province, China; E-Mails: jsl80@ 123456163.com (S.J.); cathychou@ 123456whu.edu.cn (X.Z.); yhj@ 123456whu.edu.cn (H.Y.); bingfangliu@ 123456163.com (B.L.); emilyat10@ 123456126.com (C.Z.); wangshuzhen04@ 123456163.com (S.W.); fred_pxx@ 123456126.com (X.P.); zhulili58@ 123456sina.com (L.Z.); yiding@ 123456whu.edu.cn (Y.D.)
                Author notes
                [* ]Author to whom correspondence should be addressed; E-Mail: gche@ 123456whu.edu.cn ; Tel.: +86-27-6875-2384; Fax: +86-27-6875-2327.
                Article
                ijms-13-09527
                10.3390/ijms13089527
                3431811
                22949813
                ccb2c307-2f23-4882-b1b2-e590c1d0a822
                © 2012 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.

                This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license ( http://creativecommons.org/licenses/by/3.0/).

                History
                : 22 June 2012
                : 16 July 2012
                Categories
                Short Note

                Molecular biology
                nilaparvata lugens,microsatellites,genetic diversity,polymorphism
                Molecular biology
                nilaparvata lugens, microsatellites, genetic diversity, polymorphism

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