Dissection of loci conferring resistance to stripe rust in Chinese wheat landraces from the middle and lower reaches of the Yangtze River via genome-wide association study

Cheng, Yukun; Li, Jian; Yao, Fangjie; Li, Long; Wang, Yuqi; Wu, Yu; Li, Jing; Ye, Xueling; Wang, Jirui; Jiang, Qiantao; Kang, Houyang; Li, Wei; Qi, Pengfei; Liu, Yaxi; Deng, Mei; Ma, Jian; Chen, Xianming; Zheng, Yu; Wei, Yuming; Chen, Guoyue

doi:10.1016/j.plantsci.2019.110204

Cited by 21 publications

(30 citation statements)

References 53 publications

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“…There are many QTLs and two genes were closely mapped with Yrsicau-6B.1, such as QYr.ufs-6B, QYr.caas-6BS.2, QYr.sicau-6B, QDS.sicau-6B.1, Yr35 and Yr78 [30,31,[50][51][52][53]. These results indicate that these chromosomal regions may be 'hotspot' regions for stripe-rust resistance genes [20]. Hence, such major regions may be useful for improvement of wheat stripe-rust resistance.…”

Section: Discussionmentioning

confidence: 83%

“…Yrsicau-2B.2 may be a major locus derived from the cultivar Aquileja [46]. Yrsicau-3B.1 is located close to markers 1186450 and 2277202, which ank QYr.sicau-3B.2 [20]. Yrsicau-3B.2 is anked by the marker 3953802 located in a different linkage region and may be a potentially novel QTL.…”

Section: Discussionmentioning

confidence: 99%

“…Combining APR and ASR genes is an important approach to develop new wheat cultivars with adequate durable resistance [11,16,17]. To date, formally designated Yr genes for stripe-rust resistance number to Yr83 and more than 100 temporarily named Yr genes or quantitative trait loci (QTLs) have been reported [18][19][20]. However, many of these resistance genes have been ineffective against new prevalent Pst races or not yet widely used in China and elsewhere [21,22].…”

Section: Introductionmentioning

confidence: 99%

“…They have a greater diversity of genes that respond to abiotic and biotic stresses, such as growth habit; cold; heat or drought tolerance; early growth vigor; competition with weeds and disease tolerance [27]. They could be used as important resources for stripe-rust resistance breeding [12,20,[28][29][30][31]. However, relatively few studies have investigated genetic diversity and stripe rust resistance in wheat landraces from the southern autumnsown spring wheat zone of China.…”

Section: Introductionmentioning

confidence: 99%

“…GWAS has been widely used to study agronomically important traits of a variety of crops, including maize, soybean, rice, cotton and wheat [33][34][35][36][37]. In addition, GWAS has been used to identify the genes underlying resistance to stripe rust in wheat [20,[38][39][40]. In this study, 143 common wheat landrace accessions from the southern autumnsown spring wheat zone of China were evaluated for resistance against Pst at the seedling and adultplant stages in multiple years and eld locations.…”

Section: Introductionmentioning

confidence: 99%

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Genome-wide Association Mapping Reveals Potential Novel Loci Controlling Stripe-rust Resistance in a Chinese Wheat Landrace Diversity Panel From the Southern Autumn-sown Spring Wheat Zone

Wang

Cheng

et al. 2020

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Background:Stripe rust, caused by the fungal pathogen Puccinia striiformis f. sp. tritici (Pst), is a serious foliar disease of wheat. Identification of novel stripe-rust resistance genes and cultivation of resistant varieties are considered to be the most effective approaches to control this disease. In this study, we evaluated the infection type (IT), disease severity (DS) and area under the disease progress curve (AUDPC) of 143 Chinese wheat landrace accessions for stripe-rust resistance. Assessments were undertaken in five environments at the adult-plant stage with Pst mixture races under field conditions, in addition, IT was assessed at the seedling stage with two prevalent Pst races (CYR32 and CYR34) under controlled greenhouse conditions. Results:Seventeen accessions showed stable high-level resistance to stripe rust across all environments under field tests,while four accessions showed resistance to the Pst races CYR32 and CYR34 at the all-stage.Combining phenotypic data from the field and greenhouse trials with 6404 markers covering the whole genome, we detected 17quantitative trait locus(QTLs) on 11 chromosomes for IT associated with seedling resistance and 15 QTLs on seven chromosomes for IT, final disease severityor AUDPC associated with adult-plant resistance. Four stable QTLs detected on four chromosomes, which explained 9.99%–23.30% of the phenotypic variation, were simultaneously associated with seedling and adult-plant resistance. Integrating a linkage map of stripe-rust resistance in wheat, 29 QTLs overlapped with previously reported genes or QTLs, while two and oneQTLs conferring seedling and adult-plant resistancerespectively were mapped distantly from previously reported stripe rust resistance genes or QTLs and may be novel resistantloci. Conclusions:Our results provided an integrated view of stripe rust resistance resources in a Chinese wheat landrace diversity panel from the southern autumn-sown spring wheat zone.The identified resistant accessions and resistance loci will be useful in the ongoing effort to develop new wheat cultivars with strong resistance to stripe rust.

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