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Construction of a high-resolution genetic map and identification of quantitative trait loci for salt tolerance in jute (Corchous spp.)

文献类型： 外文期刊

作者： Yang, Zemao 1 ; Yang, Youxin 2 ; Dai, Zhigang 1 ; Xie, Dongwei 3 ; Tang, Qing 1 ; Cheng, Chaohua 1 ; Xu, Ying 1 ; Liu, Ch 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Bast Fiber Crops, Minist Agr, Key Lab Stem Fiber Biomass & Engn Microbiol, Changsha 410205, Hunan, Peoples R China

2.Jiangxi Agr Univ, Dept Hort, Coll Agron, Nanchang 330045, Jiangxi, Peoples R China

3.Heilongjiang Acad Agr Sci, Inst Ind Crops, Harbin 150000, Heilongjiang, Peoples R China

关键词： Jute; Linkage groups; Quantitative trait loci mapping; Salt tolerance; Genotyping-by sequencing (GBS)

期刊名称：BMC PLANT BIOLOGY （ 2020影响因子：4.215； 五年影响因子：4.96 ）

ISSN： 1471-2229

年卷期： 2019 年 19 卷 1 期

页码：

收录情况： SCI

摘要： Background Jute (Corchorus spp.) is the most important natural fiber crop after cotton in terms of cultivation area and production. Salt stress greatly restricts plant development and growth. A high-density genetic linkage map is the basis of quantitative trait locus (QTLs) mapping. Several high-density genetic maps and QTLs mapping related to salt tolerance have been developed through next-generation sequencing in many crop species. However, such studies are rare for jute. Only several low-density genetic maps have been constructed and no salt tolerance-related QTL has been mapped in jute to date. Results We developed a high-density genetic map with 4839 single nucleotide polymorphism markers spanning 1375.41 cM and an average distance of 0.28 cM between adjacent markers on seven linkage groups (LGs) using an F2 jute population, LGs ranged from LG2 with 299 markers spanning 113.66 cM to LG7 with 1542 markers spanning 350.18 cM. In addition, 99.57% of gaps between adjacent markers were less than 5 cM. Three obvious and 13 minor QTLs involved in salt tolerance were identified on four LGs explaining 0.58-19.61% of the phenotypic variance. The interval length of QTL mapping varied from 1.3 to 20.2 cM. The major QTL, qJST-1, was detected under two salt stress conditions that explained 11.81 and 19.61% of the phenotypic variation, respectively, and peaked at 19.3 cM on LG4. Conclusions We developed the first high-density and the most complete genetic map of jute to date using a genotyping-by-sequencing approach. The first QTL mapping related to salt tolerance was also carried out in jute. These results should provide useful resources for marker-assisted selection and transgenic breeding for salt tolerance at the germination stage in jute.

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