Full TGIF Record # 309589
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Web URL(s):https://scisoc.confex.com/scisoc/2019am/meetingapp.cgi/Paper/119452
    Last checked: 12/05/2019
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Yu, Xingwang; Mulkey, Steve E.; Zuleta, Maria C.; Arellano, Consuelo; Ma, Bangya; Milla-Lewis, Susana R.
Author Affiliation:Yu, Zuleta, and Milla-Lewis: Department of Crop and Soil Sciences, North Carolina State University, Raleigh, NC; Mulkey: Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, MN; Arellano: Deparment of Statistics, North Carolina State University, Raleigh, NC; Ma: SePRO Research & Technology Campus, Whitakers, NC
Title:QTL mapping of resistance to gray leaf spot in St. Augustinegrass
Section:C05 turfgrass science
Other records with the "C05 turfgrass science" Section

Molecular techniques, genetics and plant breeding oral (includes student competition)
Other records with the "Molecular techniques, genetics and plant breeding oral (includes student competition)" Section
Meeting Info.:San Antonio, Texas: November 10-13, 2019
Source:ASA, CSSA and SSSA International Annual Meetings. 2019, p. 119452.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Keywords:TIC Keywords: Disease resistance; Gene mapping; Genetic analysis; Genetic markers; Gray leaf spot; Pyricularia grisea; Quantitative trait loci; Single nucleotide polymorphism; Stenotaphrum secundatum
Cultivar Names:PI410353; Raleigh
Abstract/Contents:"Gray leaf spot (GLS), caused by Magnaporthe grisea, is a major fungal disease of St. Augustinegrass [Stenotaphrum secundatum (Walt.) Kuntze] capable of causing widespread blighting of the foliage under warm, humid conditions. In order to identify quantitative trait loci (QTL) controlling GLS resistance, a pseudo-F2 mapping population consisting of 153 hybrids was developed from crosses between cultivar 'Raleigh' and plant introduction 'PI410353', a genotyped reported as highly resistant. Single-nucleotide polymorphism (SNP) markers generated from genotyping-by-sequencing (GBS) constituted nine linkage groups for each parental linkage map. The 'Raleigh' map consisted of 2,257 SNP markers and spanned 916.63 cM, while the 'PI410353' map comprised 511 SNP markers and covered 804.27 cM. GLS resistance was evaluated under controlled environmental conditions in three independent trials with measurements of final disease incidence and lesion length. Additionally, two derived traits, area under the disease progress curve (AUDPC) and area under the lesion expansion curve (AULEC) were calculated for QTL analysis. After initial QTL analysis, ten QTL located on linkage groups 1, 2, 5, and 8, were identified as being associated with these GLS resistance traits. Each QTL explained 2.53-23.90 % of the total phenotypic variation. Multiple GLS QTL were co-localized on linkage groups 2 and 5. The QTL and linked markers identified in this study can be used to transfer GLS resistance genes to elite St. Augustinegrass breeding lines."
See Also:Related abstract appears in ASA, CSSA and SSSA International Annual Meetings, 2022, p. 142685, R=324944. R=324944
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Yu, X., S. E. Mulkey, M. C. Zuleta, C. Arellano, B. Ma, and S. R. Milla-Lewis. 2019. QTL mapping of resistance to gray leaf spot in St. Augustinegrass. Agron. Abr. p. 119452.
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