Development and characterization of a new 1BL.1RS translocation line with resistance to stripe rust and powdery mildew of wheat

Abstract

The 1BL.1RS wheat-rye translocation from Petkus rye has contributed substantially to the world wheat production. However, following the breakdown of disease resistance genes in 1RS, its importance for wheat improvement decreased. We have developed a new 1BL.1RS line, R14, by means of crossing rye inbred line L155, selected from Petkus rye to several wheat cultivars. One new gene each, for stripe rust and powdery mildew resistance, located on 1RS of the line R14, are tentatively named YrCn17 and PmCn17. YrCn17 and PmCn17 confer resistance to Puccinia striiformis f. sp. tritici pathotypes that are virulent on Yr9, and Blumeria graminis f. sp. tritici pathotypes virulent on Pm8. These two new resistances, YrCn17 and PmCn17, are now available for wheat improvement programs. The present study indicates that rye cultivars may carry yet untapped variations as potential sources of resistance.

Molecular cytogenetic identification of a novel 1AL.1RS translocation line with powdery mildew resistance

“…Several novel 1RS translocation lines or cultivars have been developed to maintain the yield traits and other excellent agronomic traits carried by the 1RS translocations, i.e., GRS1201 (Porter et al, 1994), 48112 and 89121 (Ji et al, 2008), R14 (Ren et al, 2009), and Mv9 kr1 (Molnár-Láng et al, 2010). These new translocation lines have recovered the resistance to diseases, but they have also expanded and enriched the available genetic variation.…”

Diversity resistance to Puccinia striiformis f. sp Tritici in rye chromosome arm 1RS expressed in wheat

“…The 1BL.1RS translocation of CN10 and CN11 was inherited from the Russian wheat cultivar Aurora, which contains the gene Yr9 (Ren et al, 2009). …”

“…Unfortunately, the frequency of 1BL.1RS translocation in recently released wheat cultivars has declined (Ren et al, 2009). The key to the problem lies in a narrow genetic base contributed by the 1RS arm from cv.…”

“…The two 1DL.1RS translocations were derived from the rye Imperial and Turkey 77, respectively (Shepherd, 1973;Marais et al, 1994). Ren et al (2009) put forward the view that it is crucial to introduce a substantial number of new genetic variations from other diploid rye sources into 1RS of the 1BL.1RS translocation, for a more efficient use of 1RS in wheat-breeding programs.…”

Polyamine plays key role in different osmotic stress responses of wheat-rye 1BL/1RS translocation lines

“…The 1BL/1RS translocation lines, CN12 and CN17 studied in this research had been demonstrated to carry many valuable agronomic traits such as functional stay-green after anthesis and high disease resistance (Tang et al 2009;Ren et al 2009Ren et al , 2011. These translocations had been previously characterized using various cellular and molecular analyses (Luo et al 2006(Luo et al , 2013Zhang et al 2008).…”