Genetic potential of maize population UFV 7 for breeding in Minas Gerais/Potencial genetico da populacao de milho UFV 7 para o melhoramento em Minas Gerais

• Published in: Ciência rural 2010-06, Vol.40 (6), p.1250
• Main Authors: Faluba, Joyce de Souza, Miranda, Glauco Vieira, DeLima, Rodrigo Oliveira, de Souza, Leandro Vagno, Debem, Enoch Assis, Cruz, Ana Maria Oliveira
• Format: Article
• Language: Spanish
• Subjects: Corn
• ISSN: 0103-8478

The objective was to assess the genetic potential of maize population UFV 7 for breeding in Minas Gerais, Brazil Three experiments were installed with the maize population UFV 7 in the three regions of Minas Gerais, in the harvest of 2006/2007. There was genotype x environment interaction for all characters. It was observed genetic variability for grain yield, plant height and ear height in maize population UFV 7, in the three regions. The Southeast region was where the maize population UFV 7 had the highest parameters. The population UFV 7 presented high grain yield, 9 112kg [ha.sup.-1] in the Southeast, average grain yield, 6 510kg [ha.sup.-1] in the West and low, 4 572kg [ha.sup.-1] in the Central Region. Heritability estimate and CVg / CVe for grain yield were higher than 60% and 1.00, respectively. Grain yield had significant and positive genetic correlation with plant height and ear height, in Western and Central, and the prolificacy in Central and Southeast. For maize population UFV 7 it was conclude that it has potential for extraction of lines in the Central Region; it has the potential for immediate use in the Southeast and for new cycles selection in the Western Region of Minas Gerais. The selection for PG provides an indirect increase in plant height and ear height, in the West and Central. Key words: genetic parameters, correlation, selection. Neste trabalho, objetivou-se avaliar o potencial genetico da populacao de milho UFV 7 para o melhoramento em Minas Gerais. Foram instalados tres experimentos com a populacao de milho UFV 7, em tres regioes de Minas Gerais, na safra 2006/2007. Houve interacao genotipos x ambientes para todos os caracteres. Foi verificada variabilidade genetica para produtividade de graos, altura de plantas e altura de espigas na populacao de milho UFV 7, nas tres regioes. Na regiao Sudeste, a populacao de milho UFV 7 apresentou as maiores estimativas de parametros geneticos. A populacao UFV 7 apresentou alta produtividade de graos, 9 112kg [ha.sup.-1], no Sudeste, media produtividade, 6 510kg ha-, no Oeste, e baixa, 4 572kg [ha.sup.-1], na regiao Central. As estimativas de herdabilidade e CVg/CVe, para produtividade, foram superiores a 60% e 1,00, respectivamente. A produtividade de graos teve correlacao genetica significativa e positiva com a altura de planta e altura de espiga, na regiao Oeste e na Central, e com a prolificidade na regiao Central e regiao Sudeste. Conclui-se que a populacao de milho UFV 7 apresenta pote