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Development and characterization of wheat lines carrying stem rust resistance gene Sr43

Development and characterization of wheat lines carrying stem rust resistance gene Sr43

Dhaka April 2, 2014. In  the April issue of Theoretical and Applied Genetics(Vol. 127(4):969-980), Z. Niu and nine other authors have published an article entitled,  “the   Development and characterization of wheat lines carrying stem rust resistance gene Sr43 derived from Thinopyrum ponticum.”  They have succeeded in transferring the stem rust resistance gene Sr43, derived from Thinopyrum ponticum into common wheat (Triticum aestivum).  Sr43 is an effective gene against stem rust Ug99 races. This gene has not been used previously in wheat breeding because it is located on a large Th. ponticum 7el2chromosome segment, which also harbors genes for undesirable traits. The objective of their  study was to eliminate excessive Th. ponticum chromatin surrounding Sr43 to make it usable in wheat breeding. Wheat lines carrying Ug99-effective stem rust resistance gene Sr43 on shortened alien chromosome segments were produced using chromosome engineering; and molecular markers linked to Sr43were identified for marker-assisted selection.

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