Genetic mapping of the barley lodging resistance locus Erectoides-k

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• 作者：Peter Skov Kristensen ; Christoph Dockter ; Udda Lundqvist ; Qiongxian Lu ; Per L. Gregersen ; Hans Thordal-Christensen and Mats Hansson
• 刊名：Plant Breeding
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：135
• 期：4
• 页码：420-428
• 全文大小：994K
• ISSN：1439-0523

文摘

The barley (Hordeum vulgare L.) mutant erectoides-k.32 (ert-k.32) was isolated in 1947 from an X-ray-mutant population of cultivar ‘Bonus’. The mutant was released as a cultivar in 1958 with the name ‘Pallas’ – one of the first cereal crop cultivars developed from induced mutants. ‘Pallas’ is a semi-dwarf barley cultivar known for its culm stability and resistance to lodging. In total, eight allelic ert-k mutants are known that show different phenotypic strength concerning culm length and spike architecture. They represent alternatives to the widely used, but pleiotropic ‘Green Revolution’ alleles of the Sdw1 (semidwarf1/denso) and Uzu1 (semi-brachytic1) genes in breeding of robust elite barley cultivars. In the present study, we locate Ert-k to a 15.7-cM region in the centromeric region of chromosome 6H. Although the interval is estimated to contain approximately 700 genes, the work provides a solid foundation for the identification of the underlying mutations causing the ert-k lodging-resistant phenotype. In addition, the linked markers could be used to follow the ert-k mutant genotype in marker-assisted selection of new lodging-resistant barley cultivars.