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Objective of topic To conduct research on some biological characters of strains of King Oyster and Yunzhi mushrooms to identify best developing strains in climatic condition of Vietnam, and at the same time, to set up spawn production technologies for mushroom strains of liquid spawn in order to improve production efficiency for edible and medicinal mushrooms | MINISTRY OF EDUCATION MINISTRY OF AGRICULTURE AND TRAINING AND RURAL DEVELOPMENT VIETNAM ACADEMY OF AGRICULTURAL SCIENCES NGUYEN THI BICH THUY STUDY ON BIOLOGICAL CHARACTERISTICS AND TECHNOLOGY OF SPAWN PRODUCTION CULTIVATION OF KING OYSTER MUSHROOM PLEUROTUSERYNGII AND YUNZHI MUSHROOM TRAMETES VERSICOLOR IN VIETNAM Branch of study Crop Science Code 62.62.01.10 SUMMARY OF DOCTORAL THESIS Hanoi - 2014 This thesis is completed at VIETNAM ACADEMY OF AGRICULTURAL SCIENCES Science supervisor 1. Prof. Ph.D. Trinh Tam Kiet 2. Ass. Dr. Nguyen Trung Thanh Critic 1 . Critic 2 . Critic 3 . The thesis will be defended before Council for thesis assessment at Institutional level held at Vietnam Academy of Agricultural Sciences at.hour.minute day . month.year. This Thesis can be referred to at 1. National Library 2. Library of VietnamAcademy of Agricultural Sciences 3. Library of. INTRODUCTION 1. The urgency of the topic King Oyster Mushroom Pleurotus eryngii DC. Quél is a delicious edible fungus high nutritional and medicinal values. King oyster mushroom s fruiting bodies are of large size pretty shape so for these advantages this fungus is called King Oyster mushroom . Yunzhi mushroom Trametes versicolor L. Pilaf is a medicinal fungus of very high medicinal value that has been preferred by consumers in countries like China Japan European American countries . In Yunzhi mushroom there are polysaccharide compounds associated with protein consisting of two main types PSP polysaccharide peptide and PSK polysaccharide krestin . PSP and PSK have the effect to inhibit various types of cancer cells such as carcinoma cell carcinoma cancer of the blood cells leukemia stomach cancer colon cancer throat cancer lung cancer and breast cancer. P.M.Kidd 2000 . Together with the development of society the demand for people s is not only good but also nutritious safe and valuable health promoting food. Now on the market there are many types of edible and medicinal mushrooms imported from China .