Summary
Twelve selected, compact, clones of Bramley's Seedling induced by gamma radiation treatment were checked for stability. Representative trees were used as vegetative parents for large scale multiplication, and further buds were treated with gamma radiation to disrupt the structure of their meristems. The results indicate that seven of the clones are as stable as the original cultivar, and therefore probably homohistont, containing only cells with compact mutant genotype. The other five clones proved to be unstable and gave rise to a large proportion of apparently normal trees. It is hypothesized that in these clones the L1 (epidermis) consists of normal unchanged tissue, while the bulk of the plant tissue layers are of mutant cells, i.e. that they are periclinal chimaeras with the genotypes of the different cell layers coded for different growth forms.
Similar content being viewed by others
References
Cutting, C. V. & H. B. S. Montgomery (Eds). 1973. More and better fruit with EMLA. East Malling and Long Ashton Research Stations, 29 pp.
Decourtye, L., 1967. Actions des rayons gamma sur des variétés de poirer et de pommier en chimère. Bull. Soc. Bot. France, Coll. Morphol. Exp. 1966: 48–54.
Derman, H., 1948. Chimeral apple sports and their propagation through adventitious buds. J. Hered. 39: 235–242.
Derman, H., 1965. Colchiploidy and histological imbalance in triploid apple and pear. Amer. J. Bot. 52: 353–359.
Lacey, C. N. D. & A. I. Campbell, 1977. Character changes in induced mutants of Bramley's Seedling apple. Acta. Horti. 75: 51–61.
Lacey, C. N. D. & A. I. Campbell, 1979. The positions of mutated sectors in shoots from irradiated buds of Bramley's Seedling apple. Environmental and Experimental Botany 19: 145–152.
Lacey, C. N. D. & A. I. Campbell, 1980. The characters of some selected mutant clones of Bramley's Seedling apple and their stability during propagation. Proc. Eucarpia Fruit Section Meeting on Fruit Tree Breeding. Angers, France. Sept. 1979: 301–306.
Lacey, C. N. D., R. A. Goodall & A. I. Campbell, 1980. Induction and selection of mutant top fruit plants: Chimaera studies. Long Ashton Research Station. Ann. Rep. for 1979: 23.
Lapens, K. O. 1972. Reduced growth of shoots from adventitious buds of compact apple mutants. Canada Agricultural Research Branch Report. 1971: 345.
Lapens, K. O., C. H. Bailey & L. F. Hough, 1969. Effects of gamma rays on apple and peach leaf buds at different stages of development. I. Survival, growth and mutation frequencies. Radiation Botany 9 379–389.
Lapens, K. O. & L. F. Hough, 1970. Effects of gamma rays on apple and peach leaf buds at different stages of development. II. Injury to apical and axillary meristems and regeneration of shoot apices. Radiation Botany 10: 59–68.
Maas, V., 1970. Golden Delicious. In: Carlson et al., North American apples: Varieties, rootstocks, outlook. Michigan State University Press: 69–85.
Pereau-Leroy, P., 1970. Detection par irradiation gamma de l'influence de la structure en chimére périchne d'une variété d'oeillet sur la coloration de la fleur. comptes Rendus Acad. Sci. Paris. 270: 910–812.
Pereau-Leroy, P., 1974. Genetic interaction between tissue of carnation petals as periclinal chimeras. Rad. Bot. 14: 109–116.
Pratt, C., 1963. Radiation damage and recovery in diploid and cytochimeral varieties in apples. Rad Bot. 3: 193–206.
Pratt, C., R. D. Way & D. K. Oureckey, 1972. Irradiation of colour sports of ‘Delicious’ and ‘Rome’ apples. J. Amer. Soc. Hort. Sci. 97: 268–272.
Stewart, R. N. & H. Dermen, 1970. Detemination of the number and mitotic activity of shoot apical initial cells by analysis of mericlinal chimaeras. Amer. J. Bot. 57: 816–826.
Thney-Basset, R., 1963. The structure of periclinal chimaeras. Heredity 18: 265–285.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Lacey, C.N.D. The stability of induced compact mutant clones of Bramley's Seedling apple. Euphytica 31, 451–459 (1982). https://doi.org/10.1007/BF00021662
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00021662