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Genetic analysis of QTLs for lysine content in four maize DH populations

文献类型： 外文期刊

作者： Zhang, Xiaolei 1 ; Wen, Hongtao 1 ; Wang, Jing 1 ; Zhao, Lin 1 ; Chen, Lei 3 ; Li, Jialei 4 ; Guan, Haitao 1 ; Cui, Zhenhai 5 ; Liu, Baohai 1 ;

作者机构： 1.Heilongjiang Acad Agr Sci, Qual & Safety Inst Agr Prod, Harbin, Heilongjiang, Peoples R China

2.Key Lab Safety & Qual Cereals & Their Prod State M, Harbin, Heilongjiang, Peoples R China

3.Heilongjiang Acad Agr Sci, Harbin, Heilongjiang, Peoples R China

4.Heilongjiang Acad Agr Sci, Food Proc Inst, Harbin, Heilongjiang, Peoples R China

5.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Key Lab Soybean Mol Design Breeding, State Key Lab Black Soils Conservat & Utilizat, Changchun, Jilin, Peoples R China

关键词： Maize; Double haploid population; Lysine content; QPM; Genetic analysis

期刊名称：BMC GENOMICS （ 影响因子：3.7； 五年影响因子：4.2 ）

ISSN： 1471-2164

年卷期： 2024 年 25 卷 1 期

页码：

收录情况： SCI

摘要： BackgroundLow levels of the essential amino acid lysine in maize endosperm is considered to be a major problem regarding the nutritional quality of food and feed. Increasing the lysine content of maize is important to improve the quality of food and feed nutrition. Although the genetic basis of quality protein maize (QPM) has been studied, the further exploration of the quantitative trait loci (QTL) underlying lysine content variation still needs more attention.ResultsEight maize inbred lines with increased lysine content were used to construct four double haploid (DH) populations for identification of QTLs related to lysine content. The lysine content in the four DH populations exhibited continuous and normal distribution. A total of 12 QTLs were identified in a range of 4.42-12.66% in term of individual phenotypic variation explained (PVE) which suggested the quantitative control of lysine content in maize. Five main genes involved in maize lysine biosynthesis pathways in the QTL regions were identified in this study.ConclusionsThe information presented will allow the exploration of candidate genes regulating lysine biosynthesis pathways and be useful for marker-assisted selection and gene pyramiding in high-lysine maize breeding programs.

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