Fine mapping of a Phytophthora-resistance locus RpsGZ in soybean using genotyping-by-sequencing

Author:

Jiang Bingzhi,Cheng Yanbo,Cai Zhandong,Li Mu,Jiang Ze,Ma Ruirui,Yuan Yeshan,Xia Qiuju,Nian HaiORCID

Abstract

Abstract Background Phytophthora root rot (PRR) caused by Phytophthora sojae (P. sojae) is one of the most serious limitations to soybean production worldwide. The identification of resistance gene(s) and their incorporation into elite varieties is an effective approach for breeding to prevent soybean from being harmed by this disease. A valuable mapping population of 228 F8:11 recombinant inbred lines (RILs) derived from a cross of the resistant cultivar Guizao1 and the susceptible cultivar BRSMG68 and a high-density genetic linkage map with an average distance of 0.81 centimorgans (cM) between adjacent bin markers in this population were used to map and explore candidate gene(s). Results PRR resistance in Guizao1 was found to be controlled by a single Mendelian locus and was finely mapped to a 367.371-kb genomic region on chromosome 3 harbouring 19 genes, including 7 disease resistance (R)-like genes, in the reference Willliams 82 genome. Quantitative real-time PCR assays of possible candidate genes revealed that Glyma.03 g05300 was likely involved in PRR resistance. Conclusions These findings from the fine mapping of a novel Rps locus will serve as a basis for the cloning and transfer of resistance genes in soybean and the breeding of P. sojae-resistant soybean cultivars through marker-assisted selection.

Funder

The National Key R&D Program of China

Agriculture Research System of China

The Guangdong Agricultural Research System

The roject of the Key laboratory of Plant Molecular reeding of Guangdong Province

Publisher

Springer Science and Business Media LLC

Subject

Genetics,Biotechnology

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