Abstract
Fully awned as well as several other radiation-mutants isolated in the wheat varieties N.P. 797, N.P. 798 and N.P. 799 were tested for resistance in the seedling stage to separate races of black and brown rust.
The mutants had the resistance of the parent variety and one mutant was highly resistant to the races 10, 20 and 63 of brown rust, to which the parent strain is susceptible. There is little possibility that resistance to the additional races of brown rust in the fully awned mutant owes its origin to cross-pollination.
The results of the present study suggest that by subjecting the progenies of radiated plants to a vigorous screening procedure, it may be possible to pick up also mutants possessing resistance to rusts and other diseases.
Samenvatting
Gebaarde en andere mutanten uit de selecties N.P. 797, N.P. 798 en N.P. 799 werden getoetst op resistentie tegen afzonderlijke fysio's van zwarte en bruine roest. De mutanten hadden de resistentie van de ouderplant en 1 gebaarde mutant was bovendien zeer resistent tegen de fysio's 10, 20 en 63 van bruine roest, waarvoor de ouderplant vatbaar is. Het is niet erg waarschijnlijk dat de resistentie het gevolg is van spontane kruisbevruchting.
Dit onderzoek wijst er op dat het door een goede selectie in de nakomelingschappen van bestraalde planten mogelijk is mutanten te isoleren die resistent tegen roest en andere ziekten zijn.
Similar content being viewed by others
References
Caldecott, R. S., Stevens, H. and B. J. Roberts, Stem rust resistant variants in irradiated populations-mutations or field hybrids? Agron. J. 51 (1959): 401–403.
Pal, B. P., Swaminathan, M. S. and A. T. Natarajan, Awning induced in wheat by treatment with radioactive phosphorus. Wheat Information Service 5 (1957): 4–5.
Additional information
Miss G. Birnie, a research scholar from the Netherlands working at the Botany Division, I.A.R.I., passed away on 30th June, 1960 following a brief illness. On the basis of the data left by the late Miss Birnie, this paper has been written by Dr. M. S. Swaminathan who guided this student.
Rights and permissions
About this article
Cite this article
Birnie, G. Rust-resistance in some induced mutations of the new Pusa wheats 797, 798 and 799. Euphytica 9, 290–292 (1960). https://doi.org/10.1007/BF00029480
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00029480