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Do Bt Transgenic Events Alter the Phenotypic Stability of Maize Hybrids?

American Journal of Plant Sciences 2015年第14期6卷 2309-2316页

作者： Rafael Parreira Diniz renzo garcia von pinho José Airton Rodrigues Nunes Lívia Maria Chamma Davide Adriano Delly Veiga Joao Candido de Souza Departmento de Biologia Universidade Federal de Lavras Lavras Brazil Faculdade de Ciê ncias Agrá rias/FCA Universidade Federal da Grande Dourados/UFGD Dourados Brazil Empresa Brasileira de Pesquisa Agropecuá ria—EMBRAPA CERRADOS Planaltina Brazil

Transgene insert location in the genome through different methods is random. Thus, alterations in the expression of desired trait may occur, as well as alterations in the expression of other characteristics of receptor plant. The purpose of this study was to compare Bt transgenic maize hybrids and the respective conventional isogenic hybrid in relation to adaptability and phenotypic stability. Field trails were set up in four locations of Minas Gerais, Brazil (Campo do Meio, Lavras, Madre de Deus and Paragua?u). A randomized complete block design was used, with three replications, and the treatment structure was a factorial 6 × 2, with six hybrids in the transgenic and conventional versions. Plant and ear height and grain yield were evaluated. To estimate stability, the Anicchiarico, Wricke and AMMI methodologies were used. Grain yield and ear height of the transgenic hybrids and their respective conventional isogenic hybrid did not differ. There are differences in the phenotypic stability between transgenic hybrids with Bt technology and their counterpart conventional isogenic hybrid.

关键词： Zea mays Insect Resistance Genotype×Environment Interaction

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