The influence of leaf rust resistance genes Lr29, Lr34, Lr35 and Lr37 on breadmaking quality in wheat |
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| Authors: | MT Labuschagne ZA Pretorius B Grobbelaar |
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| Institution: | (1) Department of Plant Breeding, University of the Orange Free State, P.O. Box 339, Bloemfontein, 9300, South Africa;(2) Department of Plant Pathology, University of the Orange Free State, P.O. Box 339, Bloemfontein, 9300, South Africa |
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| Abstract: | Leaf rust, caused by Puccinia triticina, is considered one of the most important diseases of wheat. In South Africa the genes Lr29, Lr34, Lr35 and Lr37 confer effective resistance to leaf rust, qualifying them for use in cultivar improvement. To study possible secondary effects
of these genes, a collection of BC6 lines containing each of the genes singly, was evaluated for breadmaking quality. The
recurrent parent Karee, and Thatcher NILs used as resistance donors in the primary crosses, as well as Thatcher, were included
as checks. The presence of Lr29, Lr34, Lr35 and Lr37 caused a significant increase in flour protein and water absorption. For most of the other characteristics the NILs performed
statistically similar to the recurrent parent. Some sib lines performed significantly better than others, emphasising the
value of selecting for improved quality among backcross lines.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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| Keywords: | leaf rust Lr29 Lr34 Lr 35 Lr37 Puccina triticina quality Triticum aestivum wheat |
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