Selection of lettuce genotypes for phosphorus uptaking efficiency - DOI: 10.4025/actasciagron.v25i1.2348

• Autor(a) principal: Cock, Wallace Rudeck Sthel
• Data de Publicação: 2008
• Outros Autores: Tardin, Flávio Dessaune, Amaral Júnior, Antônio Teixeira do, Scapim, Carlos Alberto, Amaral, José Francisco Teixeira do, Cunha, Gláucio de Mello, Bressan-Smith, Ricardo Enrique, Pinto, Ronald José Barth
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Acta Scientiarum. Agronomy (Online)
• Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/2348
• topic: Lactuca sativa; correlação; parâmetro genético; 5.00.00.00-4 Ciências Agrárias

Nineteen late flowering lettuce genotypes from the UENF horticultural germoplasm bank were evaluated for phosphorus utilization efficiency under a 10 mg.dm-3 P level. A biometrical analysis of genetic parameters and genetic, phenotypic and environment correlations between shoot and root dry matter production, P content in roots and shoot Puptake, P-translocation and P utilization efficiency was undertaken. Genetic variability, which could be promising to obtain positive response to selection, was identified. Highest genotypic correlations were reported between root dry matter and P content in roots (0.90) and between leaf dry matter and P utilization efficiency above the soil level (0.86). These data and high genotypic determination coefficient suggest that selection of best materials may be done with material with highest leaf dry matter weight.