Summary
Male meiosis of the interspecific hybrid between Allium roylei and A. cepa is undisturbed relative to its parents. Based on meiotic data, A. roylei is concluded to be a closer relative of A. cepa than A. fistulosum. Segregation ratios for downy mildew resistance among BC1 and F2 progenies from the F1 between A. roylei and A. cepa indicate the presence of two dominantly inherited, weakly linked nuclear resistance genes, Pd 1 and Pd 2, in A. roylei (recombination frequency 0.32±0.03). Presumably Pd 1 and Pd 2are the first genes described in Allium residing in one linkage group. The prospects of exploiting A. roylei in onion breeding seem very promising.
Similar content being viewed by others
References
Cryder C.M., J.N. Corgan, N.S. Urquhart & D. Clason, 1991. Isozyme analysis of progeny derived from (Allium fistulosum × Allium cepa) × Allium cepa. Theor. Appl. Genet. 82: 337–345.
Doorn A.M. Van, 1959. Investigations on the occurrence and the control of downy mildew (Peronospora destructor) in onions. T. Pl. Ziekten 65: 193–255. (in Dutch with English summary)
El-Shafie M.W. & G.N. Davis, 1967. Inheritance of bulb colour in the onion (Allium cepa L.). Hilgardia 38: 607–622.
Emsweller S.L. & H.A. Jones, 1935a. An interspecific hybrid in Allium. Hilgardia 9: 265–273.
Emsweller S.L. & H.A. Jones, 1935b. Meiosis in Allium fistulosum, Allium cepa, and their hybrid. Hilgardia 9: 277–294.
Gohil R.N. & R. Kaul, 1980. Studies on male and female meiosis in Indian Allium I. Four diploid species. Chromosoma 77: 123–127.
Hanelt P., 1990. Taxonomy, evolution, and history. In: H.D. Rabinowitch & J.L. Brewster (Eds.), Onions and allied crops, vol. I, pp. 1–26. CRC Press, Inc., Boca Raton, Florida.
Havey M.J., 1991a. Phylogenetic relationships among cultivated Allium species from restriction enzyme analysis of the chloroplast genome. Theor. Appl. Genet. 81: 752–757.
Havey M.J., 1991b. Molecular systematics of Allium sect. Cepa. Hort. Sci. 26: 124.
Hennig E., G. Mildenberger & B. Weit, 1990. Method for field testing of Allium species for resistance to downy mildew (Peronospora destructor (Berk.) Casp.). Arch. Züchtungsforsch. 20: 251–257. (in German with English summary).
Kofoet A., C. Kik, W.A. Wietsma & J.N. De Vries, 1990. Inheritance of resistance to downy mildew (Peronospora destructor (Berk.) Casp.) from Allium roylei Stearn in the backcross Allium cepa L. × (A. roylei × A. cepa). Plant Breeding 105: 144–149.
Kofoet A. & V. Zinkernagel, 1990. Resistance to downy mildew (Peronospora destructor (Berk.) Casp.) in Allium species. Z. Pfl. Krankh. Pfl. Schutz 97: 13–23.
Labani R.M. & T.T. Elkington, 1987. Nuclear DNA variation in the genus Allium L. (Liliaceae). Heredity 59: 119–128.
McCollum G.D., 1982. Experimental hybrids between Allium fistulosum and A. roylei. Bot. Gaz. 143: 238–242.
Meer Q.P. Van Der & A.H. Permadi, 1990. Research for the improvement of shallot production in Indonesia. Onion Newsl. for the Tropics 2: 18–21.
Meer Q.P. Van Der & J.N. De Vries, 1990. An interspecific cross between Allium roylei Stearn and A. cepa L., and its backcross to A. cepa. Euphytica 47: 29–31.
Peffley E.B., J.N. Corgan, K.E. Horak & S.D. Tanksley, 1985. Electrophoretic analysis of Allium alien addition lines. Theor. Appl. Genet. 71: 176–184.
Rabinowitch, H.D., 1988. Genetics and breeding: state of the art, or: too slow but not too late. In: T.J. Riggs, D. Astley, J.L. Brewster, P.R. Dawson & R.B. Maude (Eds.), Proc. 4th Eucarpia Allium symp., pp. 57–70. Wellesbourne, UK, 6–9 September 1988.
Saini S.S. & G.N. Davis, 1967. Compatibility in some Allium species. Proc. Amer. Soc. Hort. Sci. 91: 401–409.
Stearn W.T., 1947. The Alliums of British India (by) Sir Joseph D. Hooker (Revised and supplemented by William T. Stearn). Herbertia 12: 73–84 (1945).
Valk P. Van Der, C. Kik, F. Verstappen, J.T. Everink & J.N. De Vries, 1991a. Independent segregation of two isozyme markers and inter-plant differences in nuclear DNA content in the interspecific backcross (Allium fistulosum L. × A. cepa L.) × A. cepa L. Euphytica 55: 151–156.
Valk P. Van Der, S.E. De Vries, J.T. Everink, F. Verstappen & J.N. De Vries, 1991b. Pre- and post-fertilization barriers to backcrossing the interspecific hybrid between Allium fistulosum L. and A. cepa L. with A. cepa. Euphytica 53: 201–209.
Vries J.N. De, W.A. Wietsma & T. De Vries, 1992. Introgression of leaf blight resistance from Allium roylei Stearn into onion (A. cepa L.). Euphytica 62: 127–133.
Wendelbo P., 1971. Alliaceae. In: K.H. Rechinger (Ed.), Flora Iranica, pp. 2–100. Akademische Druck- u. Verlagsanstalt, Graz, Austria.
Yarwood C.E., 1943. Onion downy mildew. Hilgardia, 14: 595–691.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
de Vries, J.N., Wietsma, W.A. & Jongerius, M.C. Linkage of downy mildew resistance genes Pd 1 and Pd 2from Allium roylei Stearn in progeny of its interspecific hybrid with onion (A. cepa L.). Euphytica 64, 131–137 (1992). https://doi.org/10.1007/BF00023546
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00023546