Effects Of Gamma Radiation On Some Morphological Characters Of Sweet Potato

Liwayway  M. Engle,; Nestor  L. Pido,

Effects Of Gamma Radiation On Some Morphological Characters Of Sweet Potato

Abstract:

Inherent variations were observed in the leaf shape of sweet potato cultivars Kinabakab and UPLB Acc. 624 and in the root skin pig entation of BNAS-51 cultivar. Doses of 2000 and 3000 rads produced wrinkled and deformed leaves in vM1 plants of all three cultivars with the latter _dose giving the higher percentage of aberrant leaves and plants with such leaves. Among the cultivars, Kinabakab apparently has the most radiosensitive leaf shape and leaf rugosity. Only Kinabakab had some vM2 plants which retained the wrinkled leaves observed in vM, plants. The same cultivar exhibited the highest mortality of cuttings obtained from vM1 plants which showed wrinkled and deformed leaves. One Kinabakab vM2 plant treated with 3000 rads produced a secondary branch that was an apparent genetic variant. Vine length at maturity and internode length of vM2 plants of the three cultivars were not significantly affected by various doses of gamma radiation.

References:

BROERTJES, C. and VAN HARTEN, A.M. 1978. Application of Mutation Breeding Methods in the Improvement of Vegetatively Pro-pagated Crops. Elsevier Scientific Publ. Co., Amsterdam. 316 р.
COMMONWEALTH AGRICULTURAL BUREAUX (CAB). 1983.
Studies on mutation breeding in sweet potato [Ipomoea batatas (L.) Lam.]. Abstract No. 7393. Plant Breeding Abstracts 53(9):685.
CUEVAS-RUIZ, J. and KOO, F.K.S. 1973. Effect of gamma radiation on sweet potato stem cuttings. J. Agric. Univ. Puerto Rico 57:351-354.
GAUL. H. 1970. Mutagen effects observable in the first generation. 1. Plant injury and lethality. In Manual on Mutation Breeding. FAO/IAEA, Vienna. pp. 85-90.
HERNANDEZ, T.P.. HERNANDEZ, T. and MILLER, J.C. 1964. Frequency of somatic mutations on several sweet potato varieties. Proc. Amer. Soc. Hort. Sci. 85:430-433.
ΝΥΒΟΜ, Ν. 1970. Mutation breeding of vegetatively propagated plants. In Manual on Mutation Breeding. FAO/IAEA, Vienna. pp. 141-147.
POOLE, C.F. 1959. Improvement in yield of sweet potato clones. Proc. Amer. Soc. Hort. Sci. 73:445-452.
PRATT, C. 1963. Radiation damage and recovery in diploid and cyto-chimerical varieties of apples. Radiat. Bot. 3:193-206.
RIDGWAY, R. 1912. Color Standards and Color Nomenclature. Little Brown and Co., Washington D.C. 103 p.
SORIANO, J.D. 1972. Effects of gamma radiation on buds of sweet potato (Ipomoea batatas [L.] Poir.). Nat. Appl. Sci. Bull. 24:41-53.
SPARROW, A.H. 1961. Radiation sensitivity of cells during mitotic and meiotic cycle with emphasis on possible cytochemical changes. Ann. N.Y. Acad. Sci. 51:1508-1540.