Effect of 60Co-γ Ray Treatment on Seed Germination and Seedling Growth in Osmanthus(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Title:: Effect of 60Co-γ Ray Treatment on Seed Germination and Seedling Growth in Osmanthus

Author(s):: XIONG Yunhai; WANG Yi; (School of Forestry and Life Sciences,University of Arts and Sciences,Chongqing 402168)

Keywords:: Osmanthus fragrans(thumb.)L.; seed germination; seedling growth; medial lethal dose; radiation breeding

Abstract:: In order to study the radiative mutation breeding of Osmanthus fragrans，explore the radiation effects of Osmanthus fragrans and select new variety of Osmanthus fragrans that having high ornamental value，the Osmanthus fragrans seeds from two different varieties(var.thunbergii Makino and var.latifolius Makino) were treated with different dosages to 60Co-γ ray (0,50,100，150，200，250 and 300 Gy)，and the seed germination rate and seedling growth were observed.The results showed that 60Co-γ radiation caused Osmanthus seedling relative growth rate decreased，the seeds germination potential was reduced,delays extend emergence，emergence uniformity was reduced，root development were inhibiting.The seeds germination rate of Osmanthus fragrans had a high negative correlation between radiation dose，the correlation coefficient was -0.86,-0.83.60Co-γ radiation could cause the leaf of Osmanthus produce more phenotypic variation,the variation rate of var..thunbergii Makino and var. latifolius Makino were （13.6±5.23）%，（12.4±4.78）% with 50 Gy treatment respectively.Using relative germination rate as an indicator，LD50 doses of 60Co-γ radiation for the seeds of var.thunbergii Makino and var. latifolius Makino were 92.39 Gy and 73.63 Gy，respectively.The radiation sensitivity of var.thunbergii Makino seeds was higher than var.latifolius Makino seeds.

[1]王宏伟.中国桂花育种的历史、现状和发展方向[J].现代园林,2007(7):74-75.

[2]杨再强,王立新.我国观赏植物辐射诱变育种研究进展[J].广西园艺,2006,17(2):44-47.

[3]王旭军,吴际友,程勇,等.辐射育种及其在林木育种中的应用前景[J].湖南林业科技,2007,34(2):13-15.

[4]陈会敏,刘从霞.浅析我国花卉育种途径及研究进展[J].河北林业科技,2011(2):70-71.

[5]王兆玉，林敬明，萝莉,等.小油桐种子的60Co-γ 射线辐射敏感性及半致死剂量的研究[J].南方医科大学学报，2009,29（3）：506-508.

[6]FAIRLESS D.The little shrub that could-maybe[J].Nature，2007,449：652-655.

[7]杨兆民,张璐.辐射诱变技术在农业育种中的应用与探析[J].基因组学与应用生物学,2011,30(1):87-91.

[8]王慧娟,孟月娥,赵秀山,等.60Co-γ射线辐射万寿菊对发芽率及生长的影响[J].中国农学通报,2009,25(19):161-163.

[9]傅巧娟，陈一，赵航平,等.60Co-γ射线处理对一串红种子发芽及幼苗形成的影响[J].浙江农业学报，2009，21(2)：135-138.

[10]李秀芬，朱建军，王一涵，等.60Co-γ射线对锦葵科3个树种发芽及幼苗生长的影响[J].上海农业学报,2010,26(2):66-69.

Last Update: 2017-03-23