Association analysis for resistance to sclerotinia stem rot disease in sunflower (Helianthus annuus L. ) using retrotransposon-based REMAP markers

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Roghayeh Najafzade H.; DARVISHZADEH REZA; Musa Khalifani Khadijeh; Abrinbana Masoud

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Journal: Iranian Journal of Field Crop Science Year:2019 | Volume:50 | Issue:1 Page(s): 15-29

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Title

Association analysis for resistance to sclerotinia stem rot disease in sunflower (Helianthus annuus L. ) using retrotransposon-based REMAP markers

Author(s)

Roghayeh Najafzade H. | DARVISHZADEH REZA | Musa Khalifani Khadijeh | Abrinbana Masoud | Issue Writer Certificate

Keywords

Association mapping (AM)Q2

Molecular markersQ1

Oily sunflowerQ1

Quantitative resistanceQ1

Sclerotinia basal stem rotQ2

Abstract

Sunflower is an important crop that its oil has nutritional and high economic value. Sclerotinia is important fungal disease of sunflower that reduces its growth and yield. In this study, the reaction of 100 Oily sunflower lines was studied to 6 fungal isolate of sclerotinia disease. Identification of gene loci related to resistance for disease was done with 120 retrotransposon-based REMAP markers. The results showed that some sunflower genotypes had the good resistant to sclerotinia disease. 8A×/LC1064C genotype showed low necrosis percentage against two A37 (S. sclerotiorum) and M1 (S. minor) isolates. In population structure analysis, 4 subpopulations were identified (K=4) using STRUCTURE software. Furthermore, in association analysis based on general and mixed linear models (GLM and MLM) using TASEEL software, nine and eight loci were identified, respectively, that were significantly associated (P≤ 0. 01) with resistance genes controlling Sclerotinia diseaseAccording to the results, CF-UBC826, 1061LTR-UBC818 and 1061LTR-UBC857 markers were commonly related to the resistant genes to some fungal isolate. Identified markers after validation and transferring to SCAR markers can be used effectively in sunflower breeding programs for marker-assisted selection (MAS) and developing resistant cultivars to Sclerotinia disease

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