| Heritability estimates for above quantitative characters showed considerable
increase in genetic variation among the mutated populations indicating that
the characters could be transmitted to further generation and significant
gain could possibly be achieved through selection in early generation (LARIK
1978). The results showed decrease the mean values and increase in genotypic
variance in mutant populations of triticale. Similar results were obtained
by GAUL (1965), SIDDIQUI & GHAFOOR (1974) and LARIK (1975). These authors
also observed a decrease in the mean values and increase in genotypic variance
in mutant populations concomitant with a high frequency of plants having
values on the negative side of the control mean. Thus, the variation observed in the M3 generation for all the characters in triticale due to the mutagenic treatment indicate the potential usefulness of mutation breeding for improvement of triticale. The investigation are preliminary in nature, and more extensive experiments are needed before definite conclusion can be drawn. Such studies are in progress in Sweden, and GUSTAFSSON and other have stated that mutation breeding which has produced useful strains in barley and other crop plants (MUNTZING 1972), would be used in triticale. RAMANATHA & JOSHI (1976) have also observed induced variation in triticale and recommended mutation as a method for improvement. The procedures should be aimed at increasing the genetic base that is also too narrow in the existing triticales. This should lead to an acceleration of the improvement in this new crop. Literature Cited BOROJEVIC, K. and S. BOROJEVIC. 1972. In "IAEA", Vienna: 237. BROCK, R.D. 1965. Rad Bot. 5: 451-464. GAUL, H. 1965. The use of induced mutation in Plant Breeding Rad. Bot. Suppl. 5: 407-428. GAUL, H. 1977. Manual of Mutation Breeding tech. Report. Series No. 119. IAEA. Vienna Austria pp. 87-96. GAUL, H. & K. AASTVEIT. 1966. "Contemporary Agriculture" Fifth Yugoslav Symp. on Res. in wheat. Navi Sad 12-18: 263-276 LARIK, A.S. 1975. Genetica Polonica 16 No. 2: 153-160. LARIK, A.S. 1978. Wheat Inform. Serv. 48: 70-73. MUNTZING, A. 1972. Biol. zbl. 19: 69-80. RAMANATHA, V.R. & M.G. JOSHI. 1976. Mutation Research 36: 85-92. SIDDIQUI, K.A. & A. GHAFOOR. The Nucleus (Pakistan) 9: 29-35. |
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