| It would, therefore, appear that gamma irradiation particularly 30 and
40 KR doses have induced significant amount of variability particularly
in M2 generations compared to their controls, confirming the
results of earlier workers (OKA et al. 1958, BHATIA & SWAMINATHAN
1962, CLAYTON 1964). The release of variability has been interpreted as
due to increased recombinations (LAWRENCE 1961). However, it can not be
decided from the present study whether the entire variability is due to
release of hidden variability or due to mutations or both. Whatever may
be the nature of induced variability, it should be possible to exploit it
for the production of better genotypes. References BHATIA, C. & M.S. SWAMINATHAN 1962. Z. pflangzenz. 48: 317-326. BROCK, R.D. 1971. Rad. Bot. 11: 181-196. CLYATON, G.A. 1964. Genet. Res. 5: 410-422. GAUL, H. 1964. Rad. Bot. 4: 155-232. GREGORY, W.C. 1961. NAS-NRC 891: 45l-486. GREGORY, W.C. 1968, Rad. Bot. 8: 84-147. LAWERENCE, C.W. 1961. Heredity 16: 83-89. MIKE, A. 1975. Can. J. Pt. Sci. 55: 865. MULLER, H.J., 1927. Sci. 66: 84-87. OKA, H.J., J. HAYASHI. I. SCHIOJIRI. 1958. J. Hered. 16: 83-89. RAWLINGS, J.O., D.A. HANWAY & C.O. GARDNER. 1958. Agron. J. 50: 524-528. STADLER, L.J. 1928. Proc. Nat. Acad. Sci. 14: 69-75. |
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