title: Registration of wheat lines carrying the partial stripe rust resistance geneYr36without theGpc-B1high grain protein content allele.
abstract: While the high-temperature adult plant resistance geneYr36represents a promising source of quantitative and potentially race non-specific resistance to wheat stripe rust (causal organismPuccinia striiformisWestend. f. sp.tritici), its tight linkage (0.3 cM) with the high-grain protein content geneGpc-B1may hinder its introgression in certain cases, such as in soft wheat varieties requiring low grain protein content or in lines where theGpc-B1allele may be associated with a yield penalty. The development and registration of two donor lines, one tetraploid (Triticum turgidumL. ssp.durum; PI 656793) and one hexaploid (T. aestivumL. ssp.aestivum; PI 664549), each carrying the resistant wild emmer (T. turgidumssp.dicoccoides) allele forYr36linked with the non-functionalGpc-B1allele, are intended to overcome this potential limitation. Meiotic recombination events breaking the linkage between these two genes were discovered during the systematic screening of a population of 4,500 F2durum plants (cv. Langdon background) used to fine mapYr36. One of the critical recombination events was selected for fixation by self-pollination and transferred to a California adapted spring hexaploid background (breeding line UC11105+10) through five generations of backcrossing. Genotypic and phenotypic data confirm the presence ofYr36and the non-functionalGpc-B1allele in both registered lines.
authors.affiliation: Department of Plant Sciences, University of California - Davis, Davis, CA 95616.
authors.forename: I
authors.initials: I
authors.lastname: Hale
authors.affiliation: Department of Plant Sciences, University of California - Davis, Davis, CA 95616.
authors.forename: X
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Agronomy, Shandong Agricultural University, Tai'an, Shandong, China, 271018.
authors.forename: D
authors.initials: D
authors.lastname: Fu
authors.affiliation: Department of Plant Sciences, University of California - Davis, Davis, CA 95616; Howard Hughes Medical Institute and Gordon & Betty Moore Foundation.
authors.forename: J
authors.initials: J
authors.lastname: Dubcovsky