Resistance to <i><scp>C</scp>ephus cinctus </i><scp>N</scp>orton, the wheat stem sawfly, in a recombinant inbred line population of wheat derived from two resistance sources

Talbert, L. E.; Sherman, Jamie; Hofland, Megan L.; Lanning, S. P.; Blake, N. K.; Grabbe, Reagan; Lamb, P. F.; Martin, John M.; Weaver, David K.

doi:10.1111/pbr.12184

Cited by 26 publications

(64 citation statements)

References 25 publications

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“…Stem solidness is an important trait for areas of the northern Great Plains of North America because a solid stem imparts resistance to the wheat stem sawfly (Kemp 1934;Talbert et al 2014). Choteau is a widely grown variety offering sawfly tolerance via solid stem (Lanning et al 2004).…”

Section: Discussionmentioning

confidence: 99%

Impact of the D genome and quantitative trait loci on quantitative traits in a spring durum by spring bread wheat cross

et al. 2015

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The impact of the D genome and QTL in the A and B genomes on agronomic performance of hexaploid wheat and tetraploid durum was determined using novel recombinant inbred line populations derived from interploid crosses. Genetic differences between common hexaploid (6X) bread wheat (Triticum aestivum, 2n = 6x = 42, genome, AABBDD) and tetraploid (4X) durum wheat (T. turgidum subsp. durum, 2n = 4x = 28, genome, AABB) may exist due to effects of the D genome and allelic differences at loci in the A and B genomes. Previous work allowed identification of a 6X by 4X cross combination that resulted in a large number of fertile recombinant progeny at both ploidy levels. In this study, interspecific recombinant inbred line populations at both 4X and 6X ploidy with 88 and 117 individuals, respectively, were developed from a cross between Choteau spring wheat (6X) and Mountrail durum wheat (4X). The presence of the D genome in the 6X population resulted in increased yield, tiller number, kernel weight, and kernel size, as well as a decrease in stem solidness, test weight and seed per spike. Similar results were found with a second RIL population containing 152 lines from 18 additional 6X by 4X crosses. Several QTL for agronomic and quality traits were identified in both the 4X and 6X populations. Although negatively impacted by the lack of the D genome, kernel weight in Mountrail (4X) was higher than Choteau (6X) due to positive alleles from Mountrail on chromosomes 3B and 7A. These and other favorable alleles may be useful for introgression between ploidy levels.

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Section: Discussionmentioning

confidence: 99%

Impact of the D genome and quantitative trait loci on quantitative traits in a spring durum by spring bread wheat cross

et al. 2015

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“…Recent results from WSS‐infested nurseries have indicated exceptions to the observation that higher levels of stem solidness are associated with increased WSS resistance (Talbert et al. ). In particular, certain cultivars, exemplified by ‘Conan’ (PI607549) (WestBred, LLC, Bozeman, MT, USA), show intermediate levels of solidness, yet a high degree of resistance to the WSS (Talbert et al.…”

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Alleles at a quantitative trait locus for stem solidness in wheat affect temporal patterns of pith expression and level of resistance to the wheat stem sawfly

et al. 2016

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The stem solidness trait in wheat has been the most effective mechanism for management of the wheat stem sawfly (WSS) for six decades. However, recent results have shown that in certain genotypes, the degree of stem solidness is not a useful indicator of WSS resistance. A morphological characterization of solidness expression indicated that in the genotype ‘Conan’, very solid pith undergoes rapid retraction during stem maturation, resulting in significantly less solidness at maturity. In other solid‐stemmed genotypes, including the standard WSS‐resistant cultivar ‘Choteau’, dense pith in the stem remains nearly unchanged throughout plant development. In cage trials, ‘Conan’ plants were less preferred for oviposition by the WSS when paired with ‘Choteau’ plants. Field bioassays using near‐isogenic lines differing for alleles at Qss.msub‐3BL showed that the Conan allele provides higher levels of early stem solidness and rapid pith retraction during stem maturation. These results suggest that the traditional approach for increasing WSS resistance by selecting for increasing stem solidness needs to be modified to consider temporal variations in pith expression associated with alleles at Qss.msub‐3BL.

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“…The solid-stem trait was first observed in a landrace from Portugal, S-615, which was used as the source of resistance in the first North American solid-stemmed cultivar in the 1940s, Rescue (CITR1235) (Platt et al, 1948). msub-3BL (Cook et al, 2004), where two distinct favorable alleles provide different levels of resistance to WSS (Talbert et al, 2014). msub-3BL (Cook et al, 2004), where two distinct favorable alleles provide different levels of resistance to WSS (Talbert et al, 2014).…”

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confidence: 99%

“…Because parasitism was a confounding factor in assessing the impact of host-plant resistance, the data on larval mortality were corrected for parasitoids as described by Talbert et al (2014). Although elite lines may represent a small part of the genetic diversity of wheat, favorable alleles present in these lines can be readily explored by plant breeders.…”

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confidence: 99%

Association Analysis of Stem Solidness and Wheat Stem Sawfly Resistance in a Panel of North American Spring Wheat Germplasm

et al. 2015

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The expanding geographical range of wheat stem sawfly (WSS) damage, coupled with the limited number of effective control measures, calls for a need to better characterize and explore the genetic variability for resistance in wheat (Triticum aestivum L.) germplasm from North America. An association‐mapping analysis for stem solidness and wheat stem sawfly resistance was conducted using a set of 244 elite spring wheat lines from 10 North American breeding programs. Three previously identified quantitative trait loci (QTL) for resistance were confirmed, including QTL for stem solidness, heading date, and stem cutting. Three new QTL on chromosomes 2A, 3A, and 5B were identified to be associated with larval mortality and a QTL associated with early stem solidness was identified on chromosome 5D. Genetic variation for late stem solidness is mainly determined by the solid‐stem QTL on chromosome 3B, while variation for early solidness is affected by chromosomal regions on 1B, 3B, and 5D. Potential sources of a novel resistance mechanism causing larval mortality were identified among the panel lines. Favorable alleles for stem solidness and other resistance traits are available within North American wheat germplasm, but only Montana and South Dakota breeding programs appear to have favorable alleles for all QTLs detected in this study. Improvements in wheat stem sawfly management, for both historically impacted areas and for regions first experiencing damage, may be obtained using alleles that already exist in elite germplasm.

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Resistance to Cephus cinctus Norton, the wheat stem sawfly, in a recombinant inbred line population of wheat derived from two resistance sources

Cited by 26 publications

References 25 publications

Impact of the D genome and quantitative trait loci on quantitative traits in a spring durum by spring bread wheat cross

Impact of the D genome and quantitative trait loci on quantitative traits in a spring durum by spring bread wheat cross

Alleles at a quantitative trait locus for stem solidness in wheat affect temporal patterns of pith expression and level of resistance to the wheat stem sawfly

Association Analysis of Stem Solidness and Wheat Stem Sawfly Resistance in a Panel of North American Spring Wheat Germplasm

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