Gene-Net Software that allows you to test hypotheses on genetic structures
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test structure gene test hypothesis genetic structure gene test

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Software that allows you to test hypotheses on genetic structures Gene-Net is a free and easy to use software which allows you to test hypotheses on genetic structure of freshwater organisms related to river network geometry. Users start to select synthetic river network and initial population parameters. Configuration of the network is characterized by the length and the number of branches.Each individual of a population located on the network is characterised by its sex, a life cycle, its genotype and a probability to move taking into account the population density. Then, Gene-Netsimulates dispersal and breeding along the river network. Genetic data resulting from the simulation are available for any located population at any time in ARLEQUIN format.Network generation module:Demographic simulations are performed along a synthetic network discretized into evenly spaced nodes. Each node is connected to one or two upper nodes (upstream) and one lower node (downstream) to allow migration in both directions. Nodes and river network characteristics are computed from a fractal river network generation module. This module needs four parameters that are enough to describe a fractal river network: two Horton’s ratios RB and RL, the maximum order of the river network n and a scale factor. The scale factor is used to multiply the space-step (distance between two nodes) and thus generate real size networks. The precise position of a stream segment within the whole river network can be identified by classifying the network. The classification system is as follows:· headwaters are first order stream segments;· when two stream segments within the same order w = i merge, the stream segment resulting from this confluence is within order w = i+1;· when two stream segments within different orders, w = i and w = j merge, the stream segment resulting from this confluence is within order w = max(i,j).This classification can be put into mathematical equation and sum-up by equation. Requirements: · Java

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