文献类型： 外文期刊

作者： Lindqvist-Kreuze, Hannele ¹ ; De Boeck, Bert ¹ ; Unger, Paula ¹ ; Gemenet, Dorcus ² ; Li, Xianping ³ ; Pan, Zhechao ³ ; Sui, Qinjun ³ ; Qin, Junhong ⁴ ; Woldegjorgis, Gebremedhin ⁵ ; Negash, Kassaye ⁵ ; Seid, Ibrahim ⁵ ; Hirut, Betaw ⁶ ; Gastelo, Manuel ¹ ; De Vega, Jose ⁷ ; Bonierbale, Merideth ¹ ;

作者机构： 1.CIP, Int Potato Ctr, Apartado 1558,Ave La Molina 1895, Lima 15024, Peru

2.ILRI, CIP Kenya, POB 30709, Nairobi, Kenya

3.Yunnan Acad Agr Sci YAAS, Ind Crops Res Inst, 2238 Beijing Rd, Kunming 650205, Yunnan, Peoples R China

4.CIP China, Beijing 100081, Peoples R China

5.Ethiopian Inst Agr Res, EIAR, Holetta Agr Res Ctr, POB 31, West Showa Zone, Oromia Region, Ethiopia

6.ILRI Ethiopia, CIP Ethiopia, POB 5689, Addis Ababa, Ethiopia

7.Earlham Inst EI, Norwich Res Pk, Norwich NR4 7UZ, Norfolk, England

8.Duquesa Business Ctr, POB 157, Malaga 29692, Spain

关键词： GWAS; polyploidy; breeding; genotyping by sequencing (GBS); Phytophthora infestans; GBLUP

期刊名称：G3-GENES GENOMES GENETICS （ 影响因子：3.542； 五年影响因子：3.545 ）

ISSN： 2160-1836

年卷期： 2021 年 11 卷 11 期

页码：

收录情况： SCI

摘要： The identification of environmentally stable and globally predictable resistance to potato late blight is challenged by the clonal and polyploid nature of the crop and the rapid evolution of the pathogen. A diversity panel of tetraploid potato germplasm bred for multiple resistance and quality traits was genotyped by genotyping by sequencing (GBS) and evaluated for late blight resistance in three countries where the International Potato Center (CIP) has established breeding work. Health-indexed, in vitro plants of 380 clones and varieties were distributed from CIP headquarters and tuber seed was produced centrally in Peru, China, and Ethiopia. Phenotypes were recorded following field exposure to local isolates of Phytophthora infestans. QTL explaining resistance in four experiments conducted across the three countries were identified in chromosome IX, and environment-specific QTL were found in chromosomes III, V, and X. Different genetic models were evaluated for prediction ability to identify best performing germplasm in each and all environments. The best prediction ability (0.868) was identified with the genomic best linear unbiased predictors (GBLUPs) when using the diploid marker data and QTL-linked markers as fixed effects. Genotypes with high levels of resistance in all environments were identified from the B3, LBHT, and B3-LTVR populations. The results show that many of the advanced clones bred in Peru for high levels of late blight resistance maintain their resistance in Ethiopia and China, suggesting that the centralized selection strategy has been largely successful.