Leaf rust and stripe rust resistance genes transferred to common wheat from Triticum dicoccoides

被引：0
|
作者：
G. F. Marais
Z. A. Pretorius
C. R. Wellings
B. McCallum
A. S. Marais
机构：
[1] University of Stellenbosch,Department of Genetics
[2] University of the Free State,Department of Plant Sciences
[3] University of Sydney,Plant Breeding Institute
[4] Agriculture and Agri-food Canada,Cereal Research Centre
来源：
Euphytica | 2005年 / 143卷
关键词：
wide hybridization;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Linked leaf rust and stripe rust resistance genes introduced from Triticum dicoccoides protected common wheat seedlings against a range of pathotypes of the respective pathogens. The genes were chromosomally mapped using monosomic and telosomic analyses, C-banding and RFLPs. The data indicated that an introgressed region is located on wheat chromosome arm 6BS. The introgressed region did not pair with the ‘Chinese Spring’ 6BS arm during meiosis possibly as a result of reduced homology, but appeared to pair with 6BS of W84-17 (57% of pollen mother cells) and ‘Avocet S’. The introgressed region had a very strong preferential pollen transmission (0.96–0.98) whereas its transmission through egg cells (0.41–0.66) varied with the genetic background of the heterozygote. Homozygous resistant plants had a normal phenotype, were fertile and produced plump seeds. Symbols Lr53 and Yr35 are proposed to designate the respective genes.
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页码：115 / 123
页数：8
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