| Autor: |
Wong, Mei Ling, Bruckner, Philip L., Berg, Jim E., Lamb, Peggy F., Hofland, Megan L., Caron, Christopher G., Heo, Hwa‐Young, Blake, Nancy K., Weaver, David K., Cook, Jason P. |
| Zdroj: |
Crop Science; March 2023, Vol. 63 Issue: 2 p556-567, 12p |
| Abstrakt: |
Host plant resistance provided by solid stems has been the most effective means for mitigating wheat stem sawfly (WSS) (Cephus cinctusNorton) damage in spring and winter wheat (Triticum aestivumL.). The solid stem trait originates from the spring wheat cultivar “Rescue” and is associated with a quantitative trait locus allele Qss.msub‐3BL.bthat explains the majority of the variation for stem solidness. Recently, a new Qss.msub‐3BLsolid stem allele, designated Qss.msub‐3BL.c, was identified in the spring wheat cultivar “Conan”. It produces a solid stem phenotype early in plant development but dissipates during plant growth. The Qss.msub‐3BL.callele provides effective WSS resistance in spring wheat but has not been tested in winter wheat. To examine if the Qss.msub‐3BL.callele provides adequate WSS resistance in winter wheat, near‐isogenic lines (NILs) were developed using marker‐assisted backcrossing. This enabled comparisons between the hollow stem Qss.msub‐3BL.a, solid stem Qss.msub‐3BL.band solid stem Qss.msub‐3BL.calleles for stem solidness, WSS resistance, and agronomic traits in Montana growing environments. Compared to the hollow stem allele, the NILs with the Qss.msub‐3BL.callele increased stem solidness and reduced WSS stem cutting. However, the Qss.msub‐3BL.callele resulted in lower solid stem scores and greater WSS stem cutting compared to the Qss.msub‐3BL.ballele. Overall, these findings indicate that the Qss.msub‐3BL.callele failed to provide sufficient WSS resistance in the winter wheat backgrounds tested in this study. Qss.msub‐3BLsolid stem alleles for wheat stem sawfly (WSS) resistance in hard red winter wheat are compared.Qss.msub‐3BL.bsolid stem allele provides better WSS resistance than the Qss.msub‐3BL.csolid stem allele.Winter wheat variety, Judee, has a unique temporal solid stem phenotype. |
| Databáze: |
Supplemental Index |
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