diff --git a/source/DataModel.cpp b/source/DataModel.cpp
index ada23b5..e174c9e 100644
--- a/source/DataModel.cpp
+++ b/source/DataModel.cpp
@@ -25,4 +25,10 @@ void DataModel::read(const QJsonObject &source)
 	{
 		m_metaData.read(metaData.toObject());
 	}
+
+    const auto &genus = source["Genus"];
+    if (genus.isObject())
+    {
+        m_genus.read(genus.toObject());
+    }
 }
diff --git a/source/Genus/CheckableItem.cpp b/source/Genus/CheckableItem.cpp
index 566bab9..9d67826 100644
--- a/source/Genus/CheckableItem.cpp
+++ b/source/Genus/CheckableItem.cpp
@@ -19,3 +19,24 @@ void CheckableItem::setState(bool checked)
 {
     m_checked = checked;
 }
+
+void CheckableItem::write(QJsonObject &json) const
+{
+    json["text"] = m_text.c_str();
+    json["checked"] = m_checked;
+}
+
+void CheckableItem::read(const QJsonObject &json)
+{
+    const auto &text = json["text"];
+    if (text.isString())
+    {
+        m_text = text.toString().toStdString();
+    }
+
+    const auto &checked = json["checked"];
+    if (checked.isBool())
+    {
+        m_checked = checked.toBool();
+    }
+}
diff --git a/source/Genus/CheckableItem.h b/source/Genus/CheckableItem.h
index bc12ff2..f097bdf 100644
--- a/source/Genus/CheckableItem.h
+++ b/source/Genus/CheckableItem.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <QJsonObject>
+
 #include <string>
 
 class CheckableItem
@@ -9,9 +11,13 @@ private:
     std::string m_text;
 
 public:
+    CheckableItem() = default;
     CheckableItem(const std::string &text);
 
     std::string getText() const;
     bool isChecked() const;
     void setState(bool checked);
+
+    void write(QJsonObject &json) const;
+    void read(const QJsonObject &json);
 };
diff --git a/source/Genus/CheckableItems.cpp b/source/Genus/CheckableItems.cpp
index 4863ff3..c3348a2 100644
--- a/source/Genus/CheckableItems.cpp
+++ b/source/Genus/CheckableItems.cpp
@@ -1,10 +1,36 @@
 #include "CheckableItems.h"
 
-void CheckableItems::write(QJsonObject &json) const
+#include <QJsonArray>
+
+CheckableItems::CheckableItems(std::initializer_list<std::string> itemNames)
 {
-    for (const auto &pair : *this)
+    for (const auto &itemName : itemNames)
     {
-        json[pair.second.getText().c_str()] =
-            pair.second.isChecked();
+        emplace_back(itemName);
+    }
+}
+
+void CheckableItems::write(QJsonArray &json) const
+{
+    for (const auto &item : *this)
+    {
+        QJsonObject itemObject;
+        item.write(itemObject);
+        json.append(itemObject);
+    }
+}
+
+void CheckableItems::read(const QJsonArray &json)
+{
+    clear();
+
+    for (const auto &itemObject : json)
+    {
+        if (itemObject.isObject())
+        {
+            CheckableItem item;
+            item.read(itemObject.toObject());
+            emplace_back(item);
+        }
     }
 }
diff --git a/source/Genus/CheckableItems.h b/source/Genus/CheckableItems.h
index 715f77b..2a1a77d 100644
--- a/source/Genus/CheckableItems.h
+++ b/source/Genus/CheckableItems.h
@@ -5,10 +5,11 @@
 #include <QJsonObject>
 #include <map>
 
-class CheckableItems : public std::map<size_t, CheckableItem>
+class CheckableItems : public std::vector<CheckableItem>
 {
 public:
-    using std::map<size_t, CheckableItem>::map;
+    CheckableItems(std::initializer_list<std::string> itemNames);
 
-    void write(QJsonObject &json) const;
+    void write(QJsonArray &json) const;
+    void read(const QJsonArray &json);
 };
diff --git a/source/Genus/GenusModel.cpp b/source/Genus/GenusModel.cpp
index e081261..229ea31 100644
--- a/source/Genus/GenusModel.cpp
+++ b/source/Genus/GenusModel.cpp
@@ -1,5 +1,6 @@
 #include "GenusModel.h"
 
+#include <QJsonArray>
 #include <QDebug>
 
 GenusModel::GenusModel(QObject *parent)
@@ -104,21 +105,35 @@ QVariant GenusModel::headerData(
 
 void GenusModel::write(QJsonObject &json) const
 {
-	QJsonObject tiere;
+    QJsonArray tiere;
 	m_tiere.write(tiere);
 	json["Tiere"] = tiere;
 
-	QJsonObject futter;
+    QJsonArray futter;
 	m_futter.write(futter);
 	json["Futter"] = futter;
 
-	QJsonObject zirkus;
+    QJsonArray zirkus;
 	m_zirkus.write(zirkus);
 	json["Zirkus"] = zirkus;
 }
 
 void GenusModel::read(const QJsonObject &json)
 {
+    if (json["Tiere"].isArray())
+    {
+        m_tiere.read(json["Tiere"].toArray());
+    }
+
+    if (json["Futter"].isArray())
+    {
+        m_futter.read(json["Futter"].toArray());
+    }
+
+    if (json["Zirkus"].isArray())
+    {
+        m_zirkus.read(json["Zirkus"].toArray());
+    }
 }
 
 bool GenusModel::isValidIndex(const QModelIndex &index) const
@@ -126,11 +141,11 @@ bool GenusModel::isValidIndex(const QModelIndex &index) const
 	switch (index.row())
 	{
 		case 0:
-			return m_tiere.find(index.column()) != m_tiere.end();
+            return index.column() < m_tiere.size();
 		case 1:
-			return m_futter.find(index.column()) != m_futter.end();
+            return index.column() < m_futter.size();
 		case 2:
-			return m_zirkus.find(index.column()) != m_zirkus.end();
+            return index.column() < m_zirkus.size();
 		default:
 			return false;
 	}
@@ -173,23 +188,21 @@ const CheckableItems &GenusModel::getItems(const QModelIndex &index) const
 CheckableItem &GenusModel::getItem(const QModelIndex &index)
 {
 	auto &items = getItems(index);
-	auto entry = items.find(index.column());
-	if (entry != items.end())
-	{
-		return entry->second;
-	}
+    if (index.column() < items.size())
+    {
+        return items.at(index.column());
+    }
 
 	throw std::runtime_error("invalid index");
 }
 
 const CheckableItem &GenusModel::getItem(const QModelIndex &index) const
 {
-	auto &items = getItems(index);
-	auto entry = items.find(index.column());
-	if (entry != items.end())
-	{
-		return entry->second;
-	}
+    auto &items = getItems(index);
+    if (index.column() < items.size())
+    {
+        return items.at(index.column());
+    }
 
 	throw std::runtime_error("invalid index");
 }
diff --git a/source/Genus/GenusModel.h b/source/Genus/GenusModel.h
index c57524f..436f2a3 100644
--- a/source/Genus/GenusModel.h
+++ b/source/Genus/GenusModel.h
@@ -10,16 +10,9 @@ class GenusModel : public QAbstractTableModel
 	Q_OBJECT
 
 private:
-	CheckableItems m_tiere = {{0, {"Tiger"}}, {1, {"Bär"}}, {2, {"Katze"}},
-		{3, {"Pferd"}}, {4, {"Gans"}}, {5, {"Elefant"}}, {6, {"Katze"}},
-		{7, {"Hund"}}};
-
-	CheckableItems m_futter = {{0, {"Salat"}}, {1, {"Fleisch"}},
-		{2, {"Knocken"}}, {3, {"Banane"}}, {4, {"Apfel"}}, {5, {"Möhre"}},
-		{6, {"Honig"}}, {7, {"Zucker"}}};
-
-	CheckableItems m_zirkus = {
-		{0, {"Kiste"}}, {1, {"Holz"}}, {2, {"Vorhang"}}, {3, {"Baum"}}};
+    CheckableItems m_tiere = { "Tiger", "Bär", "Katze", "Pferd", "Gans", "Elefant", "Katze", "Hund" };
+    CheckableItems m_futter = { "Salat", "Fleisch", "Knocken", "Banane", "Apfel", "Möhre", "Honig", "Zucker" };
+    CheckableItems m_zirkus = { "Kiste", "Holz", "Vorhang", "Baum" };
 
 public:
 	GenusModel(QObject *parent);
diff --git a/source/Genus/GenusWidget.cpp b/source/Genus/GenusWidget.cpp
index 773d44b..41faea5 100644
--- a/source/Genus/GenusWidget.cpp
+++ b/source/Genus/GenusWidget.cpp
@@ -6,15 +6,18 @@
 GenusWidget::GenusWidget(QWidget *parent)
 	: QWidget(parent)
 	, ui(new Ui::GenusWidget)
-	, m_model(new GenusModel(this))
 {
 	ui->setupUi(this);
 
-	ui->tableView->horizontalHeader()->hide();
-	ui->tableView->setModel(m_model);
+    ui->genusTableView->horizontalHeader()->hide();
 }
 
 GenusWidget::~GenusWidget()
 {
-	delete ui;
+    delete ui;
+}
+
+void GenusWidget::setModel(GenusModel *model)
+{
+    ui->genusTableView->setModel(model);
 }
diff --git a/source/Genus/GenusWidget.h b/source/Genus/GenusWidget.h
index f5212fc..b8ae706 100644
--- a/source/Genus/GenusWidget.h
+++ b/source/Genus/GenusWidget.h
@@ -14,9 +14,10 @@ class GenusWidget : public QWidget
 
 private:
 	Ui::GenusWidget *ui;
-	GenusModel *m_model;
 
 public:
 	GenusWidget(QWidget *parent = nullptr);
 	~GenusWidget();
+
+    void setModel(GenusModel *model);
 };
diff --git a/source/Genus/GenusWidget.ui b/source/Genus/GenusWidget.ui
index c06e810..b59f922 100644
--- a/source/Genus/GenusWidget.ui
+++ b/source/Genus/GenusWidget.ui
@@ -15,7 +15,7 @@
   </property>
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
-    <widget class="QTableView" name="tableView"/>
+    <widget class="QTableView" name="genusTableView"/>
    </item>
   </layout>
  </widget>
diff --git a/source/mainwindow.cpp b/source/mainwindow.cpp
index 348e1c5..7927602 100644
--- a/source/mainwindow.cpp
+++ b/source/mainwindow.cpp
@@ -31,6 +31,7 @@ void MainWindow::newFile()
 {
 	m_dataModel = std::make_unique<DataModel>(this);
 	ui->metaDataWidget->setModel(&m_dataModel->m_metaData);
+    ui->genusWidget->setModel(&m_dataModel->m_genus);
 }
 
 void MainWindow::openFile()
diff --git a/source/mainwindow.ui b/source/mainwindow.ui
index 5183b74..8d2d210 100644
--- a/source/mainwindow.ui
+++ b/source/mainwindow.ui
@@ -18,7 +18,7 @@
     <item>
      <widget class="QTabWidget" name="tabWidget">
       <property name="currentIndex">
-       <number>0</number>
+       <number>1</number>
       </property>
       <widget class="QWidget" name="MetaDataTab">
        <attribute name="title">
@@ -36,7 +36,7 @@
        </attribute>
        <layout class="QVBoxLayout" name="verticalLayout_3">
         <item>
-         <widget class="GenusWidget" name="widget" native="true"/>
+         <widget class="GenusWidget" name="genusWidget" native="true"/>
         </item>
        </layout>
       </widget>
@@ -50,7 +50,7 @@
      <x>0</x>
      <y>0</y>
      <width>905</width>
-     <height>19</height>
+     <height>17</height>
     </rect>
    </property>
    <widget class="QMenu" name="menuFile">