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A high density genetic map and QTL for agronomic and yield traits in Foxtail millet [Setaria italica (L.) P. Beauv.]

文献类型： 外文期刊

作者： Fang, Xiaomei 1 ; Dong, Kongjun 2 ; Wang, Xiaoqin 1 ; Liu, Tianpeng 2 ; He, Jihong 2 ; Ren, Ruiyu 2 ; Zhang, Lei 3 ; Liu, 1 ;

作者机构： 1.Southwest Univ, Minist Educ, Engn Res Ctr South Upland Agr, Chongqing 400716, Peoples R China

2.Gansu Acad Agr Sci, Crop Res Inst, Lanzhou 730070, Gansu, Peoples R China

3.Gansu Acad Agr Sci, Crop Res Inst, Lanzhou 730070, Gansu, P

关键词： Genetic map;QTL;Agronomic traits;Yield traits;Foxtail millet (Setaria italica L.)

期刊名称：BMC GENOMICS （ 影响因子：3.969； 五年影响因子：4.478 ）

ISSN： 1471-2164

年卷期： 2016 年 17 卷

页码：

收录情况： SCI

摘要： Background: Foxtail millet [Setaria italica (L.) P. Beauv.], a crop of historical importance in China, has been adopted as a model crop for studying C-4 photosynthesis, stress biology and biofuel traits. Construction of a high density genetic map and identification of stable quantitative trait loci (QTL) lay the foundation for marker-assisted selection for agronomic traits and yield improvement. Result: A total of 10598 SSR markers were developed according to the reference genome sequence of foxtail millet cultivar 'Yugu1'. A total of 1013 SSR markers showing polymorphism between Yugu1 and Longgu7 were used to genotype 167 individuals from a Yugu1 x Longgu7 F-2 population, and a high density genetic map was constructed. The genetic map contained 1035 loci and spanned 1318.8 cM with an average distance of 1.27 cM between adjacent markers. Based on agronomic and yield traits identified in 2 years, 29 QTL were identified for 11 traits with combined analysis and single environment analysis. These QTL explained from 7.0 to 14.3 % of phenotypic variation. Favorable QTL alleles for peduncle length originated from Longgu7 whereas favorable alleles for the other traits originated from Yugu1 except for qLMS6.1. Conclusions: New SSR markers, a high density genetic map and QTL identified for agronomic and yield traits lay the ground work for functional gene mapping, map-based cloning and marker-assisted selection in foxtail millet.

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