Rht24 reduces height in the winter wheat population 'Solitär × Bussard' without adverse effects on Fusarium head blight infection

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
Cathérine Pauline HerterT Miedaner

Abstract

The dwarfing gene Rht24 on chromosome 6A acts in the wheat population 'Solitär × Bussard', considerably reducing plant height without increasing Fusarium head blight severity and delaying heading stage. The introduction of the Reduced height (Rht)-B1 and Rht-D1 semi-dwarfing genes led to remarkable increases in wheat yields during the Green Revolution. However, their utilization also brings about some unwanted characteristics, including the increased susceptibility to Fusarium head blight. Thus, Rht loci that hold the potential to reduce plant height in wheat without concomitantly increasing Fusarium head blight (FHB) susceptibility are urgently required. The biparental population 'Solitär × Bussard' fixed for the Rht-1 wild-type alleles, but segregating for the recently described gibberellic acid (GA)-sensitive Rht24 gene, was analyzed to identify quantitative trait loci (QTL) for FHB severity, plant height, and heading date and to evaluate the effect of the Rht24 locus on these traits. The most prominent QTL was Rht24 on chromosome 6A explaining 51% of genotypic variation for plant height and exerting an additive effect of - 4.80 cm. For FHB severity three QTL were detected, whereas five and six QTL were found for plant heigh...Continue Reading

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Citations

Dec 7, 2018·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Barbara SteinerHermann Buerstmayr
Oct 28, 2019·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Karolina Maria Słomińska-DurdasiakJochen Christoph Reif
Jul 1, 2020·International Journal of Molecular Sciences·Raman DhariwalHarpinder S Randhawa
Dec 24, 2020·International Journal of Molecular Sciences·Thomas MiedanerCathérine Pauline Grote

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Methods Mentioned

BETA
chip

Software Mentioned

ASReml
PlabMQTL

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