Registration of NC96BGTA4, NC96BGTA5, and NC96BGTA6 Wheat Germplasm

Murphy, J. Paul; Leath, S.; Huynh, D.; Navarro, R. A.; Shi, Ainong

doi:10.2135/cropsci1999.0011183x003900030065x

Cited by 10 publications

(11 citation statements)

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“…The powdery mildew resistance genes in the North Carolina germplasm lines NC96BGTA4 and NC99BGTAG11 are also located on chromosome 7AL (Srnić et al, 2005). The disease reaction response of NCA6 differs from both NC96BGTA4 (Murphy et al, 1999) and NC99BGTAG11 (our results). The source of powdery mildew resistance in NC96BGTA4 was the T. monococcum accession PI 221414 and the donor of the NC99BGTAG11 Pm gene was the T. timopheevii subsp.…”

Section: Discussioncontrasting

confidence: 61%

“…The soft red winter wheat powdery mildew resistant germplasm line NC96BGTA6 (PI 599036) was crossed to the susceptible cultivar Saluda (PI 480474). NC96BGTA6 (NCA6) is a homogeneously resistant BC 2 F 5 ‐derived line with the pedigree Saluda *3/PI 427772 (Murphy et al, 1999). Saluda is a soft red winter wheat cultivar developed by the Virginia Polytechnic Institute and State University (Starling et al, 1986).…”

Section: Methodsmentioning

confidence: 99%

“…Among the designated powdery mildew resistance genes only the Pm1b allele from the cultivar MocZlatka (Hsam et al, 1998) and Pm25 from the North Carolina germplasm line NC96BGTA5 (Shi et al, 1998; Murphy et al, 1999) have been reported as being transferred from T. monococcum into common wheat. Pm1 was mapped to chromosome 7AL by Sears and Briggle (1969) and microsatellite markers linked to this locus were identified by Singrün et al (2003) Shi et al (1998) mapped Pm25 to chromosome 1AS and identified random amplified polymorphic DNA (RAPD) markers linked to this locus.…”

mentioning

confidence: 99%

“…The North Carolina germplasm lines NC96BGTA4 and NC96BGTA6 also have T. monococcum as their source of resistance to powdery mildew (Murphy et al, 1999). Srnić et al (2005) characterized the powdery mildew resistance gene in NC96BGTA4 but due to its chromosomal location on 7AL, additional allelism studies are needed to differentiate this locus from the Pm1 complex.…”

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confidence: 99%

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Genetic Mapping of a Triticum monococcum‐derived Powdery Mildew Resistance Gene in Common Wheat

Miranda

Perugini

Srnic³

et al. 2007

Crop Science

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Powdery mildew of wheat (Triticum aestivum L.) is a major fungal disease caused by Blumeria graminis DC f. sp. tritici A microsatellite linkage map was developed for the T. monococcum‐derived powdery mildew resistant gene present in the North Carolina germplasm line NCBGT96A6 (NCA6). Genetic analysis of F2‐derived lines from the cross NCA6 × ‘Saluda’ indicated a single gene controlled powdery mildew resistance. Four microsatellite markers linked to the NCA6 Pm gene mapped to chromosome 7AL. The most likely order was Xcfa2123‐0.9 cM–Xbarc121‐1.7 cM resistance gene/Xcfa2019‐3.0 cM‐Xgwm332 A detached‐leaf test indicated the disease reaction response of the NCA6 Pm gene was different from the five known alleles at the Pm1 locus on 7AL. Deletion interval mapping showed a large physical to genetic distance ratio for these microsatellite marker loci. This may be due to suppressed recombination between the introgressed T. monococcum segment and the homologous region of the T. aestivum cultivar Saluda. Our results suggested that the NCA6 Pm gene is likely a novel source of resistance to powdery mildew but additional allelism studies are needed to establish the relationship between this locus and the other known Pm loci on 7AL.

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Section: Discussioncontrasting

confidence: 61%

Section: Methodsmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Genetic Mapping of a Triticum monococcum‐derived Powdery Mildew Resistance Gene in Common Wheat

Miranda

Perugini

Srnic³

et al. 2007

Crop Science

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“…Once mapped in wild progenitor species, these genes can be transferred to hexaploid wheat with minimum of the linked alien chromatin to ensure its commercial utility. In addition, many more undesignated pm genes NCA6Pm, from T. monococcum (Murphy et al 1999), mlRD30 from T. aestivum (Singrun et al 2004), PmU from T. uratu (Qui (Yao et al 2007), mllw72, MIWE18, and PmG16 from T. dicoccoides (Ji et al 2008;Han et al 2009;BenDavid et al 2010) have been mapped on 7AL. The long arm of wheat chromosome 7AL is known to carry several disease resistance genes including Pm1, Pm9, Pm37, Lr20, Sr15, andSr22 (McIntosh et al 2013, Ji et al 2008).…”

Section: Discussionmentioning

confidence: 99%

Fine mapping of powdery mildew resistance genes PmTb7A.1 and PmTb7A.2 in Triticum boeoticum (Boiss.) using the shotgun sequence assembly of chromosome 7AL

et al. 2015

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A novel powdery mildew resistance gene and a new allele of Pm1 were identified and fine mapped. DNA markers suitable for marker-assisted selection have been identified. Powdery mildew caused by Blumeria graminis is one of the most important foliar diseases of wheat and causes significant yield losses worldwide. Diploid A genome species are an important genetic resource for disease resistance genes. Two powdery mildew resistance genes, identified in Triticum boeoticum (A(b)A(b)) accession pau5088, PmTb7A.1 and PmTb7A.2 were mapped on chromosome 7AL. In the present study, shotgun sequence assembly data for chromosome 7AL were utilised for fine mapping of these Pm resistance genes. Forty SSR, 73 resistance gene analogue-based sequence-tagged sites (RGA-STS) and 36 single nucleotide polymorphism markers were designed for fine mapping of PmTb7A.1 and PmTb7A.2. Twenty-one RGA-STS, 8 SSR and 13 SNP markers were mapped to 7AL. RGA-STS markers Ta7AL-4556232 and 7AL-4426363 were linked to the PmTb7A.1 and PmTb7A.2, at a genetic distance of 0.6 and 6.0 cM, respectively. The present investigation established that PmTb7A.1 is a new powdery mildew resistance gene that confers resistance to a broad range of Bgt isolates, whereas PmTb7A.2 most probably is a new allele of Pm1 based on chromosomal location and screening with Bgt isolates showing differential reaction on lines with different Pm1 alleles. The markers identified to be linked to the two Pm resistance genes are robust and can be used for marker-assisted introgression of these genes to hexaploid wheat.

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Genome Sequences from Diploids and Wild Relatives of Wheat for Comparative Genomics and Alien Introgressions

Schoen,

Saripalli,

Hosseinirad

et al. 2023

Compendium of Plant Genomes

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Bread wheat is an important food source worldwide, contributing ~20% of the caloric intake per person worldwide. Due to a domestication bottleneck and highly selective breeding for key traits, modern wheat cultivars have a narrow genetic base. Wheat production faces several challenges due to both abiotic and biotic stresses as well as changing climatic conditions and genetic improvement of wheat is generally considered to be the most sustainable approach to develop climate resilient cultivars with improved yield and end-use traits. Since wheat cultivars and landraces have been explored extensively to identify novel genes and alleles, one way to overcome these pitfalls is by looking into the proverbial treasure trove of genomic diversity that is present in wheat’s wild relatives. These wild relatives hold reservoirs of genes that can confer broad-spectrum resistance to pathogens, increase yield, provide additional nutrition, and improve dough quality. Genetic approaches and techniques have existed to introgress wild chromatin to bread wheat, as well as trace introgressions present in the germplasm for over 7 decades. However with the availability of NGS technologies, it is now easier to detect and efficiently integrate the genetic diversity that lies within wheat’s gene pools into breeding programs and research. This chapter provides a concise explanation of current technologies that have allowed for the progression of genomic research into wheat’s primary, secondary, and tertiary gene pools, as well as past technologies that are still in use today. Furthermore, we explore resources that are publicly available that allow for insight into genes and genomes of wheat and its wild relatives, and the application and execution of these genes in research and breeding. This chapter will give an up-to-date summary of information related with genomic resources and reference assemblies available for wheat’s wild relatives and their applications in wheat breeding and genetics.

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Registration of NC96BGTA4, NC96BGTA5, and NC96BGTA6 Wheat Germplasm

Cited by 10 publications

References 0 publications

Genetic Mapping of a Triticum monococcum‐derived Powdery Mildew Resistance Gene in Common Wheat

Genetic Mapping of a Triticum monococcum‐derived Powdery Mildew Resistance Gene in Common Wheat

Fine mapping of powdery mildew resistance genes PmTb7A.1 and PmTb7A.2 in Triticum boeoticum (Boiss.) using the shotgun sequence assembly of chromosome 7AL

Genome Sequences from Diploids and Wild Relatives of Wheat for Comparative Genomics and Alien Introgressions

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