public static Markers readTxt(String fileName, Genome genome, int positionBase) {
		if (genome == null) genome = new Genome();
		Markers markers = new Markers();

		// Parse lines
		LineFileIterator lfi = new LineFileIterator(fileName);
		int lineNum = 1;
		for (String line : lfi) {
			Marker interval = new Marker();
			interval.readTxt(line, lineNum, genome, positionBase);
			markers.add(interval);
			lineNum++;
		}
		return markers;
	}