TITLE:
Do Bt Transgenic Events Alter the Phenotypic Stability of Maize Hybrids?
AUTHORS:
Rafael Parreira Diniz, Renzo Garcia Von Pinho, José Airton Rodrigues Nunes, Lívia Maria Chamma Davide, Adriano Delly Veiga, João Cândido de Souza
KEYWORDS:
Zea mays, Insect Resistance, Genotype × Environment Interaction
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.6 No.14,
September
15,
2015
ABSTRACT: 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.