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Special Issue: Rust Diseases of Field Crops and Forest Trees

Mapping stem rust resistance loci effective in Kenya in Canadian spring wheat (Triticum aestivum L.) lines ‘AAC Prevail’ and ‘BW961’

ORCID Icon, , , , , , , & ORCID Icon show all
Pages S263-S274 | Accepted 06 Aug 2021, Published online: 28 Sep 2021

Figures & data

Table 1. Mean and range of the stem rust severity and infection response scores for the ‘AAC Prevail’/‘BW961ʹ doubled haploid population and parents evaluated in field nursery near Njoro, Kenya for four years, 2016–2019

Fig. 1 Frequency distribution of stem rust severity in the ‘AAC Prevail’/’BW961ʹ doubled haploid population evaluated for the Ug99 and other stem rust races at Njoro experimental station, Kenya for each year from 2016 to 2019. Dark arrows indicate the stem rust response of the parents ‘AAC Prevail’ and ‘BW961ʹ

Fig. 1 Frequency distribution of stem rust severity in the ‘AAC Prevail’/’BW961ʹ doubled haploid population evaluated for the Ug99 and other stem rust races at Njoro experimental station, Kenya for each year from 2016 to 2019. Dark arrows indicate the stem rust response of the parents ‘AAC Prevail’ and ‘BW961ʹ

Table 2. Chromosomal position, associated markers, phenotype variation explained (PVE) and additive effects of stem rust resistance quantitative trait loci (QTL) detected in ‘AAC Prevail’/‘BW961ʹ population at Njoro, Kenya nursery evaluated for four years (2016–2019)

Fig. 2 Linkage map of stem rust resistance QTL detected on chromosomes 2B and 7A in the ‘BW961ʹ/‘AAC Prevail’ population in Njoro, Kenya from 2016 to 2019, aligned with previously published hexaploid wheat high density consensus maps (Wang et al. Citation2014; Bokore et al. Citation2020)

Fig. 2 Linkage map of stem rust resistance QTL detected on chromosomes 2B and 7A in the ‘BW961ʹ/‘AAC Prevail’ population in Njoro, Kenya from 2016 to 2019, aligned with previously published hexaploid wheat high density consensus maps (Wang et al. Citation2014; Bokore et al. Citation2020)

Fig. 3 Individual and combined effects of stem rust resistance QTL located on chromosome 2B associated with the SNP marker Tdurum_contig29563_197 and 7A with Tdurum_contig59633_56 in Njoro, Kenya. Bars with the same letter within experiment (2016–2019) are not significantly different according to the Duncan’s Multiple Range test at P = 0.05.

Fig. 3 Individual and combined effects of stem rust resistance QTL located on chromosome 2B associated with the SNP marker Tdurum_contig29563_197 and 7A with Tdurum_contig59633_56 in Njoro, Kenya. Bars with the same letter within experiment (2016–2019) are not significantly different according to the Duncan’s Multiple Range test at P = 0.05.

Table 3. List of KASP markers developed for stem rust resistance QSr-sparc-2B and QSr-sparc-7A and associated primer sequences

Supplemental material

Supplemental Material

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