National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Stripe or yellow rust of wheat, caused by Puccinia striiformis f. sp. Tritici (Pst), is an important disease in many wheat-growing regions of the world. Although, the pathogen has overcome resistance offered by more than 90 genes and QTLs still, aggregation of resistant genes in future wheat genotypes is the most practical and efficient means of tackling the rapidly evolving virulent races of Pst. The germplasm of non-progenitor qwr4567890 Aegilops species with substantial amount of variability has been exploited to a limited extent. Various Aegilops species have been reported to possess resistance to several wheat diseases. A number of genes imparting resistance to various rusts have been transferred to cultivated wheats from their wild relatives. The Lr34/Yr18/Sr57/Pm38 gene is a globally important genetic resource for wheat resistance breeding against leaf rust and stripe rust. A total of 67 leaf rust resistance genes (Lr) and 48 stripe rust resistance genes (Yr) have been catalogued so far. Several genes for resistance to leaf rust and stripe rust have been introgressed from Aegilops and Thinopyrum species to cultivated wheat. Lines with adult plant resistance, gene pyramiding and shuttle breeding have been practised to have resistance against various races of the rust pathogen. Marker-assisted selection (MAS) methods for APR would be useful, however, the multigenic nature of APR impedes the use of MAS efforts that aim to pyramid only a few target genes.
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