Foreword Preface

1 Germplasm Resources

1.1 The Origin and Evolution of Wild Species..

1

1.2 The Status of Wild Germplasm Resources and Their Protection..

4

1.3 Research and Use of Wild Germplasm Resources

11

2. The Origin of Cultivars

16

2.1 The Origin ofCultivars and the Cultivated Variety Group..

16

2.2 The Development of Horticultural Varieties of Tree Peony in Each Dynasty

18

2.3 The Study and Use of Cultivar Resources

20

3 The Evolution of Cultivars

26

3.1 The Evolution of Flower Color and Blotch

26

3.2 The Evolution of Floral Organs

28

3.3 The Formation and Evolution of the Proliferation Flower

31

3.4 The Discussion of the Evolutional Rule of the Flower Form .. ,..

34

4. Cultivar Classification

36

4.1 Advances of Research in Cultivar Classification

36

4.2 Classification System of Chinese Tree Peony Cultivars.

38

5. Cultivar Improvement and Industrial Development

43

5.1 Chinese Tree Peony's Brief Breeding History and Its Development Trend.

43

5.2 The Cultivar Improvement, Industrialization and Development.

46

6. Xibei Cultivar Group

53

6.1 General

53

6.2 Cultivation Technique.

57

6.3 Major Cultivars of Xibei Cultivar Group.

63

7. Xinan Cultivar Group

145

7.1 General..

145

7.2 Cultivation Technique.

148

7.3 Major Cultivars of Xinan Cultivar Group.

15

8. Jiangnan Cultivar Group

157

8.1 Genera] Statements..

157

8.2 Cultivation Technique.

163

8.3 Major Cultivars of Jiangnan Cultivar Group

169

9. Other Tree Peony Cultivar Groups

179

9.1 Yan'an Tree Peonies

179

9.2 Exi Tree Peonies

188

9.3 Cold Area Tree Peony

198

References

201

Index of Cultivars Names

203