Sensitivity of Jatropha curcas seeds to (60)Co-gamma radiation and their medial lethal doses in radiation breeding / 南方医科大学学报

ABSTRACT

<p><b>OBJECTIVE</b>To study the sensitivity of Jatropha curcas seeds from three different locations to (60)Co-gamma radiation and to determine the medial lethal doses (LD50) of (60)Co-gamma radiation for these seeds.</p><p><b>METHODS</b>Six different radiation doses (0, 100, 150, 200, 250 and 300 Gy) were used. Based on the germination rate 50%, LD50 doses of (60)Co-gamma radiation for the seeds were calculated using linear regression equation.</p><p><b>RESULTS</b>LD50 doses of (60)Co-gamma radiation for these seeds were 178 Gy (seeds from Guangdong), 132 Gy (seeds from Hainan) and 198 Gy (seeds from India) respectively. Increasing radiation doses caused more significant changes in leaf shape of the M1 seedlings.</p><p><b>CONCLUSION</b>The results provides an important experimental basis for the radiation breeding of the important herbal and energy plant J. curcas.</p>