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Molecular mapping of a rust resistance gene R-14 in cultivated sunflower line PH 3

文献类型： 外文期刊

作者： Zhang, Ming 1 ; Liu, Zhao 3 ; Jan, Chao-Chien 4 ;

作者机构： 1.Heilongjiang Acad Agr Sci, Inst Ind Crops, Harbin 150001, Peoples R China

2.Northeast Agr Univ, Harbin 150030, Peoples R China

3.N Dakota State Univ, Dept Plant Sci, Fargo, ND 58108 USA

4.USDA ARS, No Crop Sci Lab, 1307 18th St N, Fargo, ND 58102 USA

关键词： Sunflower;Rust resistance;Simple sequence repeat (SSR);Single nucleotide polymorphism (SNP);Marker-assisted breeding

期刊名称：MOLECULAR BREEDING （ 影响因子：2.589； 五年影响因子：2.75 ）

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收录情况： SCI

摘要： Sunflower, the fifth largest oilseed crop in the world, plays an important role in human diets. Recently, sunflower production in North America has suffered serious yield losses from newly evolved races of sunflower rust (Puccinia helianthi Schwein.). The rust resistance gene, designated R-14, in a germplasm line PH 3 originated from a wild Helianthus annuus L. population resistant to 11 rust races. PH 3 has seedling with an extraordinary purple hypocotyl color. The objectives of this study were to map both the R-14 rust resistance gene and the purple hypocotyl gene-designated PHC in PH 3, and to identify molecular markers for marker-assisted breeding for sunflower rust resistance. A set of 517 mapped SSR/InDel and four SNP markers was used to detect polymorphisms between the parents. Fourteen markers covering a genetic distance of 17.0 cM on linkage group (LG) 11 were linked to R-14. R-14 was mapped to the middle of the LG, with a dominant SNP marker NSA_000064 as the closest marker at a distance of 0.7 cM, and another codominant marker ORS542 linked at 3.5 cM proximally. One dominant marker ZVG53 was linked on the distal side at 6.9 cM. The PHC gene was also linked to R-14 with a distance of 6.2 cM. Chi-squared analysis of the segregation ratios of R-14, PHC, and ten linked markers indicated a deviation from an expected 1:2:1 or 3:1 ratio. The closely linked molecular or morphological markers could facilitate sunflower rust-resistant breeding and accelerate the development of rust-resistant hybrids.

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[1]Physiological and biochemical responses in sunflower leaves infected by Sclerotinia sclerotiorum. Liu, Jia,Liu, Jia,Zhang, Yunhua,Meng, Qinglin,Shi, Fengmei,Ma, Ligong,Li, Yichu. 2017

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