Summary
An analyis of an F1-based incomplete diallel was conducted involving 11 parents with different levels of resistance to Karnal bunt (Tilletia indica (Mitra)). It demonstrated that general combining ability (GCA) and thus additive or additive × additive gene effects were very important in the inheritance of resistance, accounting for 86.9% of the variation. Further analysis concentrated on F3 lines derived from individual random F2 plants from crosses with resistant varieties having the highest negative GCA effects. It was shown that the varieties Weaver and W499 have single dominant genes of resistance, which are different from each other, and which differ from a single allelic gene in varieties K342 and Cruz Alta. The majority of the crosses did not demonstrate a relationship between Karnal bunt infection and the number of days to heading. Resistant F3 lines varied in the number of days to heading from 80 to 100.
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References
Falconer, D.S., 1981. Introduction to quantitative genetics. N.Y., Longman, p.252.
Fuentes-Davila, G., 1992. Identification of sources of resistance to Tilletia indica. p. 12–13. In: G. Fuentes-Davila & G.P. Hettel (Eds). Update on Karnal Bunt Research in Mexico. Wheat Special Report No. 7. Mexico, D.F.: CIMMYT.
Chand, K., K.S. Gill, G.S. Nanda & G. Singh, 1989. Genetic analysis for Karnal bunt resistance in bread wheat. Crop Improv. 16: 178–179.
Gill, K.S., 1990. Genetics of resistance to Karnal bunt and loose smut in wheat. Paper presented at 29th All India Wheat Research Workers Workshop held at Kumarganj-Faizabad on August 27–29, 1990. pp. 1–21.
Griffing, B., 1956. Concept of general and specific combining ability in relation to diallel crossing systems. Austr. J. Biol. Sci. 9(4): 463–493.
Krishna, A. & R.A. Singh, 1982. Investigations on the disease cycle of Karnal bunt of wheat. Indian J. of Mycology and Plant Pathol. 12: 124.
Nagarajan, S. & E.E. Saari, 1992. Epidemiology of Karnal bunt (Tilletia indica). p. 19–20. In: G. Fuentes-Davila & G.P. Hettel (Eds). Update on Karnal Bunt Research in Mexico. Wheat Special Report No. 7. Mexico, D.F.: CIMMYT.
Rajaram, S., G. Fuentes-Davila, M. van Ginkel, G. Gettinet, M. Camacho, J. Montoya, A. Amaya, J. Peña, H.Z. Hu & G. Tianyou, 1992. Breeding bread wheat resistance to Karnal bunt (Tilletia indica). p. 14–15. In: G. Fuentes-Davila & G.P. Hettel (Eds). Update on Karnal Bunt Research in Mexico. Wheat Special Report No. 7. Mexico, D.F.: CIMMYT.
Singh, D.V. & H.S. Dhaliwal, 1989. Screening of wheat germplasm for components of resistance to Karnal bunt disease. Indian Phytopath. 42 (3): 393–399.
Warham, E.J., 1988. Screening for Karnal bunt (Tilletia indica) resistance in wheat, triticale, rye and barley. Can. J. Plant Pathol. 10: 57–60.
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Morgunov, A., Montoya, J. & Rajaram, S. Genetic analysis of resistance to Karnal bunt (Tilletia indica (Mitra)) in bread wheat. Euphytica 74, 41–46 (1993). https://doi.org/10.1007/BF00033765
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DOI: https://doi.org/10.1007/BF00033765