Correlation and repeatability in progenies of African oil palm = Correla es e repetibilidade em prog那nies de dend那

作者：Digner Santiago Ortega Cedillo; Willian Silva Barros; Fabio Medeiros Ferreira; Luiz Antnio dos Santos Dias

来源：Acta Scientiarum - Agronomy, 2008.

• Elaeis guineensis
• genotype stabilization
• plant breeding
• Elaeis guineensis
• estabiliza o genotipica
• melhoramento genetico vegetal

The phenotypic, genotypic and environmental correlations between thenumber of palm fruit bunches and the annual yield and their combinations in African palm were estimated. There were also estimated the coefficients of repeatability and determination, with the objective of indicating the lowest number of successive harvestsrequired to exploit the genotypic potential of the evaluated progenies. The genotypic correlation between the number of bunches per plant and the yield was negative, indicating that when genotypes with a higher yield are selected the number of bunches decreases. Ingeneral, the signal of the genotypic correlation differed was opposite to the one from the environmental correlation, evidencing that genetic and environmental factors influence the number of bunches and yield through different physiological mechanisms. Based on the method of principal components applied to the correlation matrix, at least four years of evaluation seem to be necessary, values coefficients of reliability and repeatability were87.6% e 0.64, respectively. Estimaram-se as correla es fenot赤picas, genot赤picas e ambientais entre o n迆mero de cachos por planta e a produ o anual e suas combina es em dend那 (Elaeis guineensis). Os coeficientes derepetibilidade e de determina o tamb谷m foram estimados, com o objetivo de indicar o per赤odo m赤nimo de colheita necess芍rio para se acessar o potencial genot赤pico das prog那nies avaliadas. A correla o genot赤pica entre o n迆mero de cachos e a produ o foi negativa,indicando que, se forem selecionados os gen車tipos com maior produ o, o n迆mero de cachos dever芍 diminuir. A correla o genot赤pica geralmente apresentou sinal oposto do que precedia correla o ambiental, evidenciando que as causas gen谷ticas e ambientaisinfluenciam o n迆mero de cachos e a produ o por meio de mecanismos fisiol車gicos distintos. Com base no m谷todo de componentes principais aplicado 角 matriz de correla o, o per赤odo m赤nimo de colheitas foi de quatro anos, com confiabilidade de 87,6% e coeficiente de repetibilidade de 0,64.