Maximizing Genetic Improvement in The Selection of Soybean for Adaptation to Low Light Intensity

Abstract

Breeding for soybean varieties with improved adaptation to low light intensity under intercropping condition is currently in progress at the Research Group on Crop Improvement, Department of Agronomy and Horticulture, Bogor Agricultural University. A study was conducted to maximize genetic improvement in the selection for tolerance to low light intensity in soybean lines. The study consisted of a genetic study to estimate the response to selection under low light intensity and a selection under field condition of advanced breeding lines. The estimation of response to selection was conducted in a genetic study was carried out in Griffing method II with 12 F1 genotypes and the parental lines to determined genetic parameters and the estimation of response to selection. The study showed that selection with secondary characters will not result in a higher yield than direct selection based on yield alone. The estimation on response to selection was evaluated in a selection of 150 advanced breeding lines under the canopy of immature rubber trees.