Abstract
Breeding for resistance to the three rusts of wheat usually requires incorporation of genetically independent factors conferring resistance to each rust. Linked resistance genes in some alien translocation stocks permit concurrent transference of resistance for more than one rust. Alien derived resistances, however, are often reported to be associated with reduced yield and other undesirable characters. In our experience, backcross breeding when given a limited number of backcrosses (3–6) and with suitable selection procedures has resulted in lines giving yields higher or comparable to the recurrent wheat parent Kalyansona and resistance to one, two or all three rusts without any adverse effects. Some of the rust resistant derivatives also show resistance to Neovossia indica (Karnal bunt). The derivatives thus developed when used as parents in a breeding programme have produced several improved cultivars with high yields, superior grains and diversity for resistance to rust pathogens. One of the cultivars, named ‘Vaishali’ (DL784-3), has been officially released for cultivation in the country.
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Sawnney, R.N., Sharma, J.B. Introgression of diverse genes for resistance to rusts into an improved wheat variety, Kalyansona. Genetica 97, 255–261 (1996). https://doi.org/10.1007/BF00055312
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DOI: https://doi.org/10.1007/BF00055312