A Novel QTL Mapping Model For Allometric Scalings And Pleiotropic Extension

There is a general rule in biological, that is, as time is horizontal axis, the growth of organisms follow a logistic curve. We used functional mapping based on the logistic curve to study the biomasses of organs in the growth processes of soybean. Then we detected the QTLs that affect the growth process of soybean, and discussed functional mapping in statistically.Furthermore, in order to reveal allometric growth and its pleiotropism, a new model is proposed to map the QTL which is related to allometric growth based on the framework of functional mapping originated with Dr. Wu in this paper. Using this model, asoybean population of recombinant inbred lines (RIL) is demonstrated to analyze the QTLs which affect allometric growth between leaf biomass and total weight. The QTLs in the24th linkage groups detected by this model are testified by the logistic model to find out pleiotropisms. This extended model improves the accuracy of QTL mapping and estimateof the parameters of allometric growth by means of two merits, which the dynamic traits of biological growth processes are conceived and multiple time points in the experimental data are employed.