Physic nut (Jatropha curcas Linn.) is
well known as an energy plant. The oil can be
used for low speed engines without adding any
substances and is suitable for agricultural engines
such as in plowing machinery, water pumps and
farm trucks (Sidhinew, 2002). Although the physic
nut can be grown under various climatic and
edaphic conditions and can resist drought, it has
a poor yield of 100–300 kg.rai-1.yr-1 (Pasbhut and
Sutiponpiboon, 2001) which equates to 625–1,875
kg.ha-1.yr-1. Therefore, study on increasing the
yield is necessary to solve this problem. In the
current research, the aim was to increase the yield
of physic nut by using colchicine to develop a new
variety that would have double the number of
chromosomes and affect production by producing