Trong nghiên cứu này, hạt của tổ hợp lai DM12x13 lan Dendrobium thấp cây nảy mầm trên môi trường 1 2 MS sau 40 ngày gieo được sử dụng làm vật liệu chiếu xạ để xác định liều gây chết 50% (LD50). | Khảo sát ảnh hưởng của chiếu xạ gamma 60Co đến cây lan lai Dendrobium thấp cây .den color inherit .ttnd ol .ttnd ul .ttnd dl padding 0 0px 0 20px .ttnd hr margin 10px 0px .ttnd a href javascript void 0 .ttnd a href color inherit dtextscript p text-align left dtextscript img vertical-align middle 32 Trường Đại học Nông Lâm TP. Hồ Chí Minh lt br gt lt br gt lt br gt lt br gt lt br gt 60 lt br gt Effects of gamma rays from Co source on dwarf Dendrobium cross-breeding lt br gt lt br gt lt br gt Vinh V. Nguyen1 Anh H. Tran2 Le amp Tri M. Bui4 lt br gt 1 lt br gt Crop Production and Plant Protection Branch in Ho Chi Minh City Vietnam lt br gt 1 lt br gt Department of Research Administration Van Hien University Ho Chi Minh City Vietnam lt br gt 3 lt br gt Faculty of Biology and Biotechnology University of Science Ho Chi Minh City Vietnam lt br gt 4 lt br gt Faculty of Agronomy Nong Lam University Ho Chi Minh City Vietnam lt br gt lt br gt lt br gt lt br gt ARTICLE INFO ABSTRACT lt br gt Research Paper In this research seeds of DM12x13 dwarf Dendrobium cross-breeding lt br gt germinated on 12 MS medium after 40 days were irradiated by 60 Co lt br gt Received September 08 2019 source with various doses to determine LD50 Lethal Dose 50 . lt br gt Revised November 12 2019 After LD50 had been determined protocorms of DM12x13 dwarf lt br gt Accepted December 26 2019 Dendrobium cross-breeding was irradiated by gamma rays from 60 Co lt br gt source in 5 doses 0 Gy control 20 Gy 40 Gy 60 Gy and 80 Gy dose lt br gt Keywords rate 90 Gy h to study the effect of gamma radiation on mutagenicity lt br gt and evaluate the growth of these mutations in vitro. The result showed lt br gt Cross-breeding that the lethal dose of hybrid DM12x13 Dendrobium protocorm under lt br gt 60 lt br gt Co source the effect of 60 Co gamma ray was 68 Gy. Survival ratio growth and lt br gt the ability to growth of plants reduced in higher doses and dead ratio lt br gt Dwarf Dendrobium lt br gt were .
