Linkage between the Lr10 gene conditioning resistance to leaf rust, two endosperm proteins, and hairy glumes in hexaploid wheat

Abstract

The possibility that genes controlling the expression of wheat endosperm proteins are linked to the Lr10 gene conditioning resistance to leaf rust (Puccinia recondita f. sp. tritici) race 1 was examined. Derived F3 progeny lines from a cross between two hexaploid spring wheat cultivars (Triticum aestivum) 'Little Club' and line 'Prelude' Lr10 (RL6004), segregated for the Lr10 gene, gliadin component band 50 (54 kilodalton, kDa), a nongliadin endosperm protein (70 kDa), and hairy glumes (Hg). These four characters were each monogenically inherited and were linked, with the gene order being Lr10, (54 and 70 kDa polypeptides), Hg. These genes are located on the short arm of chromosome 1A. The genes Hg and Lr10 could be useful flanking markers to study the fine structure of the complex Gli-A1 locus.Key words: leaf rust, gliadins, glumes (hairy).