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Mapping quantitative trait loci (QTLs) and estimating the epistasis controlling stem rot resistance in cultivated peanut (Arachis hypogaea).
Luo, Ziliang; Cui, Renjie; Chavarro, Carolina; Tseng, Yu-Chien; Zhou, Hai; Peng, Ze; Chu, Ye; Yang, Xiping; Lopez, Yolanda; Tillman, Barry; Dufault, Nicholas; Brenneman, Timothy; Isleib, Thomas G; Holbrook, Corley; Ozias-Akins, Peggy; Wang, Jianping.
Affiliation
  • Luo Z; Agronomy Department, University of Florida, Gainesville, FL, USA.
  • Cui R; Department of Plant Pathology, University of Georgia, Tifton, GA, USA.
  • Chavarro C; Center for Applied Genetic Technologies, Institute of Plant Breeding, Genetics and Genomics, The University of Georgia, Athens, GA, USA.
  • Tseng YC; Agronomy Department, University of Florida, Gainesville, FL, USA.
  • Zhou H; Department of Agronomy, National Chiayi University, Chiayi, Taiwan.
  • Peng Z; Agronomy Department, University of Florida, Gainesville, FL, USA.
  • Chu Y; Agronomy Department, University of Florida, Gainesville, FL, USA.
  • Yang X; Department of Horticulture, Institute for Plant Breeding, Genetics and Genomics, University of Georgia Tifton Campus, Tifton, GA, USA.
  • Lopez Y; Agronomy Department, University of Florida, Gainesville, FL, USA.
  • Tillman B; Agronomy Department, University of Florida, Gainesville, FL, USA.
  • Dufault N; Agronomy Department, University of Florida, Gainesville, FL, USA.
  • Brenneman T; North Florida Research and Education Center, Marianna, FL, USA.
  • Isleib TG; Department of Plant Pathology, University of Florida, Gainesville, FL, USA.
  • Holbrook C; Department of Plant Pathology, University of Georgia, Tifton, GA, USA.
  • Ozias-Akins P; Department of Crop and Soil Sciences, North Carolina State University, Raleigh, NC, USA.
  • Wang J; Crop Genetics and Breeding Research Unit, USDA-ARS, Tifton, GA, USA.
Theor Appl Genet ; 133(4): 1201-1212, 2020 Apr.
Article in En | MEDLINE | ID: mdl-31974667
KEY MESSAGE: A total of 33 additive stem rot QTLs were identified in peanut genome with nine of them consistently detected in multiple years or locations. And 12 pairs of epistatic QTLs were firstly reported for peanut stem rot disease. Stem rot in peanut (Arachis hypogaea) is caused by the Sclerotium rolfsii and can result in great economic loss during production. In this study, a recombinant inbred line population from the cross between NC 3033 (stem rot resistant) and Tifrunner (stem rot susceptible) that consists of 156 lines was genotyped by using 58 K peanut single nucleotide polymorphism (SNP) array and phenotyped for stem rot resistance at multiple locations and in multiple years. A linkage map consisting of 1451 SNPs and 73 simple sequence repeat (SSR) markers was constructed. A total of 33 additive quantitative trait loci (QTLs) for stem rot resistance were detected, and six of them with phenotypic variance explained of over 10% (qSR.A01-2, qSR.A01-5, qSR.A05/B05-1, qSR.A05/B05-2, qSR.A07/B07-1 and qSR.B05-1) can be consistently detected in multiple years or locations. Besides, 12 pairs of QTLs with epistatic (additive × additive) interaction were identified. An additive QTL qSR.A01-2 also with an epistatic effect interacted with a novel locus qSR.B07_1-1 to affect the percentage of asymptomatic plants in a row. A total of 193 candidate genes within 38 stem rot QTLs intervals were annotated with functions of biotic stress resistance such as chitinase, ethylene-responsive transcription factors and pathogenesis-related proteins. The identified stem rot resistance QTLs, candidate genes, along with the associated SNP markers in this study, will benefit peanut molecular breeding programs for improving stem rot resistance.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Arachis / Plant Diseases / Chromosome Mapping / Genes, Plant / Plant Stems / Quantitative Trait Loci / Epistasis, Genetic / Disease Resistance Type of study: Prognostic_studies Language: En Journal: Theor Appl Genet Year: 2020 Type: Article Affiliation country: United States
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Arachis / Plant Diseases / Chromosome Mapping / Genes, Plant / Plant Stems / Quantitative Trait Loci / Epistasis, Genetic / Disease Resistance Type of study: Prognostic_studies Language: En Journal: Theor Appl Genet Year: 2020 Type: Article Affiliation country: United States