Summary
True-breeding, leaf rust (Puccinia coronata Cda. f. sp. avenae Fraser and Led.) resistant oat lines with somatic chromosome numbers of 42 and 44, were recovered in the advanced generations of a pentaploid hybrid from the cross between C.I. 7232, a leaf rust resistant and dark lemma colored derived tetraploid and ‘Clarion’, a susceptible hexaploid oat. Microsporocyte observations and breeding behaviour of these lines and their F1 hybrids with susceptible hexaploid oat cultivars indicated that the 42- and 44-chromosome lines are disomic substitutions (20″+1″A) and disomic additions (21″+1″A), respectively, of the same alien chromosome which carries genes for dark colored lemma and leaf rust resistance. The substitution and addition lines possess good field resistance to leaf rust. Plants of substitution lines were less vigorous, shorter, with poor straw and reduced fertility. Addition lines had reduced tillering ability, plant vigour, culm thickness, leaf width and fertility and were late maturing. Progeny tests for resistance indicated that substitution lines are more stable than addition lines. It is suggested that these lines may be of value in a program of radiation-induced gene transfer.
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References
Anderson, L. M. & C. J., Driscoll, 1967. The production and breeding behaviour of a monosomic alien substitution line. Can. J. Genet. Cytol. 9: 399–403.
Aung, T. & H., Thomas, 1976. Transfer of mildew resistance from wild oat, Avena barbata, into the cultivated oat. Nature 260: 603–604.
Bakshi, J. M. & A. M., Schlehuber, 1958. Identification of a substitututed chromosome pair in a Triticum-Agropyron line. Proc. Okla. Acad. Sci. 39: 16–21.
Dyck, P. L. & T., Rajhathy, 1963. Cytogenetics of a hexaploid oat with an extra pair of chromosomes. Can. J. Genet. Cytol. 5: 408–413.
Forsberg, R. A. & I., Nishiyama, 1969. Instability of crown rust reaction and kernel color in F6–F10 lines of a derived-tetraploid x Avena sativa hybrid. Crop Science 9: 723–725.
Katterman, G., 1938. Über konstante, halmbehaarte Stämme aus Weizenroggenbastardierung mit 2n=42 chromosomen. Z. Indukt. Abstamm. u. Vererbungsl. 74: 354–375.
Kihara, H. & I., Nishiyama, 1932. Different compatibility in reciprocal crosses of Avena with special reference to tetraploid hybrids between hexaploid and diploid species. Jap. J. Bot. 6: 245–305.
Knott, D. R., 1964. The effect on wheat on an Agropyron chromosome carrying rust resistance. Can. J. Genet. Cytol. 6: 500–507.
Larson, R. I. & T. G., Atkinson, 1970. Identity of the wheat chromosomes replaced by Agropyron chromosomes in a triple alien chromosome substitution line immune to wheat strak mosaic. Can. J. Genet. Cytol. 12: 145–150.
Lee, Y. H., E. N., Larter & L. E., Evans, 1969. Homoeologous relationship of rye chromosome VI with two homoeologous groups from wheat. Can. J. Genet. Cytol. 11: 803–809.
Marshall, H. G. & W. M., Myers, 1961. A cytogenetic study of certain interspecific Avena hybrids and the inheritance of resistance in diploid and tetraploid varieties to races of crown rust. Crop Sci. 1: 29–34.
Mettin, D., W. D. Bluthner & G. Schlegel, 1973. Additional evidence on spontaneous 1B/1R wheat-rye substitutions and translocations. Proc. 4th Int. Wheat Genet. Symp., pp. 179–184.
Quinn, C. J. & C. J., Driscoll, 1967. Relationships of the chromosomes of common wheat and related genera. Crop Sci. 7: 74–75.
Rajhathy, T., 1963. A standard Karyotype for Avena sativa. Can. J. Genet. Cytol. 5: 126–132.
Rajhathy, T. & J. W., Morrison, 1959. Chromosome morphology in the genus Avena. Can. J. Bot. 37: 331–337.
Riley, R., 1965. Cytogenetics and plant breeding. Genetics today. Proc. 11th Intern. Congr. Genet. The Hague 3: 681–688.
Sears, E. R., 1968. Relationships of chromosomes 2A, 2B, and 2D with their rye homoeologue. Proc. 3rd Intern. Wheat Genet. Symp. Aust. Acad. Sci. Canberra, pp. 53–61.
Sharma, D. C., 1975a. Chromosome pairing problem in interploidy rust resistance transfer in Avena. Euphytica 24: 503–510.
Sharma, D. C., 1975b. A leaf rust resistant alien addition line in hexaploid oat. Cereal Res. Communications 3: 237–244.
Sharma, D. C. & R. A., Forsberg, 1974. Alien chromosome substitution — a cause of instability for leaf rust resistance in oats. Crop Sci. 14: 533–536.
Thomas, H., 1968. The addition of single chromosomes of Avena hirtula to the cultivated hexaploid oat, A. sativa. Can. J. Genet. Cytol. 10: 551–563.
Thomas, H., J. M., Leggett & I. T., Jones, 1975. The addition of a pair of chromosomes of the wild oat, Avena barbata (2n=28) to the cultivated oat, A. sativa L. (2n=42). Euphytica 24: 717–724.
Wienhues, A., 1965. Cytogenetische Untersuchungen über die chromosomale Grundlage der Rostresistenz der Weizensorte Weigue. Züchter 35: 352–354.
Wienhues, A., 1966. Transfer of rust resistance of Agropyron to wheat by addition, substitution and translocation. Proc. 2nd Int. Wheat Genet. Symp. pp. 328–341.
Zillinzky, F. J., K., Sadanaga, M. D., Simmons & H. C., Murphy, 1959. Rust-resistant tetraploid derivatives from crosses between Avena abyssinica and A. strigosa. Agron. J. 51: 343–345.
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Sharma, D.C. Disomic alien chromosome substitution and addition in hexaploid oat. Euphytica 27, 581–586 (1978). https://doi.org/10.1007/BF00043185
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DOI: https://doi.org/10.1007/BF00043185