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Inheritance studies in certain wheats drawn from each of the groups carrying different APR sources (Sawhney et al. 1992) suggested the operation of 1-3 genes to the control of resistance. Allelism tests have been conducted which established the presence of Lr34 in wheats, Kundan (DL153-2), BW11, UP301, HD2189, HD2160.

Study of ninety Australian wheats recognized that for adult plant resistance, seven wheats in four groups existed. Each group was postulated to be of diverse APR source (Sawhney et al. 1995b).


Acknowledgements

Thanks to Dr. R.A. Mclntosh, University of Sydney, Australia for certain seed materials used in the study and to the Council of Scientific and Industrial Research for award of research grant to R.N. Sawhney.


References

Sawhney RN (1992) The role of Lr34 in imparting durable resistance to wheat leaf rust through gene interaction. Euphytica 61: 9-12.

Sawhney RN (1995) Genetics of wheat-rust interaction. Plant Breeding Reviews 13:293-343.

Sawhney RN, Sharma JB, and Sharma DN (1992) Genetic diversity for adult plant resistance to leaf rust (Puccinia recondita) in near isogenic lines and in Indian wheats. Plant Breeding 100: 248-254.

Sawhney RN, Sharma JB and Sharma DN (1993) Adult plant interactive genes for durable resistance to leaf rust with increased yield potential in wheat (abst. 220). Proc 8th Int Wheat Genet Symp, Beijing China: 120.

Sawhney RN, Sharma J13 and Sharma DN (1994) Non-specific adult plant resistance to leaf rust with potential for durability. Cereal Rusts and Powdery Mildews Bull. 22 (part 2): 9-13.

Sawhney RN, Sharma JB and Sharma DN (1995a) Identification of adult plant resistance and its role for durable resistance to leaf rust in Indian wheats. In: Genetic Research and Education: Current Trends and the Next 50 years. Ed: Sharma B et al. Indian Soc. Genet. Pl. Breeding 1:356-362.

Sawhney RN, Sharma JB, Sharma DN and Nagarajan S (1995b) Adult plant resistance sources for breeding durably leaf rust resistant wheats. Cereal Rusts and Powdery Mildews Bull. 23 (In press).

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