What is the optimum x-ray dose enough to induce mutation in maize?

Dear Oke Ekeneoriong

Pls. find the attached files, may help in your research, good luck

http://www.fao.org/3/a-i2388e.pdf

http://link.springer.com/article/10.1007/BF00265176

http://link.springer.com/chapter/10.1007%2F978-1-4613-1567-4_18

http://link.springer.com/article/10.1023/A:1004162323428

https://genomebiology.biomedcentral.com/articles/10.1186/gb-2004-5-3-r16

http://www.oxfordjournals.org/our_journals/jhered/freepdf/21-3.pdf

https://www.thevespiary.org/rhodium/Rhodium/Vespiary/talk/files/2134-Mutations-induced-by-ethyl-methanesulfonate-in-maize-807f.pdf

http://www.rrjournal.org/doi/abs/10.2307/3574186

http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0049467

http://plantbreeding.coe.uga.edu/index.php?title=20._Mutagenesis

http://www.jstor.org/stable/2458553

http://www.nobelprize.org/nobel_prizes/medicine/laureates/1946/muller-lecture.html

http://www.nap.edu/read/10977/chapter/5

Regards

Prof. Houda Kawas