Regional Agricultural Research Station, Acharya N. G. Ranga Agricultural University, Palem 509 215, Mahaboobnagar District, Andhra Pradesh.
* Corresponding author's e-mail: janila@cdfd.org.in
1Present address: Centre for DNA Fingerprinting and Diagnostics, ECIL Road, Nacharam, Hyderabad 500 076.
We report isolation of three recessive mutants in castor using dry seed irradiation with gamma rays. The crinkled leaf mutant (cri) was identified in K-55-112 M2 family and leafy mutant (lea) in H-55-577 M2 family; both are recessive lethal and thus maintained as heterozygotes. The cri mutant has highly wrinkled leaves resembling finger millet head and failed to enter reproductive phase, consequently did not produce seeds. The number of leaf lobes is reduced in lea mutant and though it produced spikes, the male and female flowers are converted to leafy appendages. The third mutant, fused (fus) stem identified in H-55-617 M2 family is a recessive mutant. The branches of which are fused at the base and though each branch terminates in to monoceous spike like normal plant, the spike is highly condensed. The three mutants under report are valuable genetic stocks for development of linkage maps in castor, which is at infancy.
Induced mutants, gamma rays, Ricinus communis, recessive lethal, and developmental mutants
