Article
Plant Sciences
Kyu Jin Sa, Hyeon Park, So Jung Jang, Ju Kyong Lee
Summary: This study aimed to identify quantitative trait loci (QTLs) controlling amylose content in maize through association mapping using SSR and SNP markers. The study found several candidate genes associated with amylose content, such as GRMZM2G118690 and GRMZM5G830776. The findings provide insights into the gene regulation of agriculturally important traits.
Article
Plant Sciences
Xiaolei Zhang, Min Wang, Haitao Guan, Hongtao Wen, Changzheng Zhang, Changjun Dai, Jing Wang, Bo Pan, Jialei Li, Hui Liao
Summary: Increasing total oil content (TOC) in maize kernels is important for optimizing feeding requirement and improving quality. Four double haploid (DH) populations were studied to understand the genetic basis of TOC using quantitative trait loci (QTL). The majority of TOC variations were controlled by genetic factors, with moderate to high heritability. Six major QTLs were identified, including qOC-1-3 and qOC-2-3 on chromosome 9, which had the largest effect on TOC. These QTLs provide insights into the genetic basis of TOC in maize and offer potential ways to breed maize varieties with better grain quality.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Plant Sciences
Minyi Wei, Tongping Luo, Dahui Huang, Zengfeng Ma, Chi Liu, Yuanyuan Qin, Zishuai Wu, Xiaolong Zhou, Yingping Lu, Liuhui Yan, Gang Qin, Yuexiong Zhang
Summary: A high-density genetic map containing 2193 Bin markers was constructed for rice grain shape analysis. A total of 39 QTLs related to grain shape were identified, with 15 QTLs repeatedly detected in multiple environments. Locus 1, Locus 3, Locus 10, and Locus 14 were novel loci associated with multiple traits, and a theoretical basis and genetic resources for the molecular breeding of rice grain shape genes were provided.
Article
Plant Sciences
Wei Wang, Zhaobin Ren, Lu Li, Yiping Du, Yuyi Zhou, Mingcai Zhang, Zhaohu Li, Fei Yi, Liusheng Duan
Summary: In this study, meta-QTL analysis was used to integrate 282 QTLs related to GDR and GWC. A total of 11 MQTLs associated with GDR and 34 MQTLs associated with GWC were identified. The average CI of GDR and GWC MQTLs was significantly reduced compared to the average QTL interval. Furthermore, a large number of candidate genes related to GDR and GWC, including genes related to hormone metabolism, were identified in the MQTL intervals.
Article
Biotechnology & Applied Microbiology
Xiaolei Zhang, Ming Lu, Aiai Xia, Tao Xu, Zhenhai Cui, Ruiying Zhang, Wenguo Liu, Yan He
Summary: This study identified QTL associated with husk traits in maize and teosinte, revealing genetic relationships between husk length, width, and layers, which provide clues for exploring candidate genes regulating husk growth.
Article
Biochemistry & Molecular Biology
Kyu Jin Sa, Ik-Young Choi, Jong Yeol Park, Jae-Keun Choi, Si-Hwan Ryu, Ju Kyong Lee
Summary: This study genotyped the maize Mo17/KW7 recombinant inbred line (RIL) population using the Illumina MaizeSNP50 BeadChip, and identified several QTLs related to grain yield and quality traits, which can be effectively utilized in both normal maize and waxy maize breeding programs.
Article
Plant Sciences
Meijie Luo, Baishan Lu, Yaxing Shi, Yanxin Zhao, Junling Liu, Chunyuan Zhang, Yuandong Wang, Hui Liu, Yamin Shi, Yanli Fan, Li Xu, Ronghuan Wang, Jiuran Zhao
Summary: In this study, the key genes regulating the biosynthesis of maize grain oil were identified through analysis of oil contents, RNA sequencing, and mapping.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Agronomy
Famao Liang, Wei Zhan, Gang Hu, Hua Liu, Yongzhong Xing, Zhixin Li, Zhongmin Han
Summary: Currently, the effectiveness of QTL mapping depends on the quality of phenotypic data, and the sample size and mapping method also influence the results. Experimental results show that phenotypic data from 5 plants per genotype are sufficient for QTL mapping of traits with high or moderate heritability, and the genotype-based mapping method is more powerful.
MOLECULAR BREEDING
(2022)
Article
Plant Sciences
Xiaolei Zhang, Min Wang, Changzheng Zhang, Changjun Dai, Haitao Guan, Ruiying Zhang
Summary: In this study, four double haploid populations were used to identify quantitative trait loci (QTLs) associated with starch content (SC) in maize kernels. A total of 13 QTLs for SC were detected, with some partly overlapping with known related QTLs. Additionally, 12 genes involved in starch synthesis and metabolism were identified.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Yukun Jin, Zhongren Zhang, Yongjing Xi, Zhou Yang, Zhifeng Xiao, Shuyan Guan, Jing Qu, Piwu Wang, Rengui Zhao
Summary: This study identified key genes associated with cold tolerance in maize and verified their impact on cold stress in maize. These findings provide important clues for improving maize resilience and increasing yield.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Hongzheng Sun, Zeke Yuan, Fuhao Li, Qianqian Zhang, Ting Peng, Junzhou Li, Yanxiu Du
Summary: This study aimed to map the QTLs controlling grain chalkiness in japonica rice by crossing two cultivars and performing QTL-seq analysis. A QTL controlling grain chalkiness, qChalk1, was detected in both F-2 and BC1F2 segregating populations, and it was located in a 1.1 Mb genomic region on chromosome 1.
MOLECULAR BIOLOGY REPORTS
(2023)
Article
Biochemistry & Molecular Biology
Jae-Ryoung Park, Dany Resolus, Kyung-Min Kim
Summary: Through QTL mapping, the gene OsBRKq1 related to grain size in rice was identified in the SNDH populations, showing interactions with other genes controlling grain size and potential for increasing yield. Additionally, stable expression levels of OsBRKq1 were confirmed, indicating its potential use for enhancing rice production and addressing food scarcity in the future.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Biotechnology & Applied Microbiology
Wenqiang Li, Yanhui Yu, Luxi Wang, Yun Luo, Yong Peng, Yuancheng Xu, Xiangguo Liu, Shenshen Wu, Liumei Jian, Jieting Xu, Yingjie Xiao, Jianbing Yan
Summary: By measuring the dynamic changes in grain moisture content in diverse maize inbred lines at five successive stages across five geographical environments, the study revealed 71 QTLs influencing grain moisture and identified GRMZM5G805627 and GRMZM2G137211 as candidate genes for major QTLs. Epistatic effects were found to play vital roles in the variability in moisture levels, surpassing main-effect QTLs during the early dry-down stages.
PLANT BIOTECHNOLOGY JOURNAL
(2021)
Article
Agronomy
Guillermo Donaire, Leonardo S. S. Vanzetti, Maria B. Conde, Carlos Bainotti, Leticia Mir, Lucas Borras, Oswaldo Chicaiza, Marcelo Helguera
Summary: In the last century, wheat breeding programs have consistently increased yield but at the expense of grain protein concentrations. This study identified four genomic regions associated with increases in grain protein content and/or grain yield, providing potential tools for wheat breeding programs to break the negative correlation between these traits.
Article
Agronomy
Grethel P. Gaytan-Pinzon, Eduardo Sandoval-Castro, Luis A. Peinado-Fuentes, Juan P. Valenzuela-Apodaca, Abraham Cruz-Mendivil, Carlos L. Calderon-Vazquez
Summary: The inclusion of high-oil maize germplasm into breeding programs is a promising way to improve grain nutritional quality. This study analyzed the genetic diversity and population structure of four high-oil maize populations. The results showed wide genetic variability among the populations, highlighting their potential for maize breeding programs. The analysis also revealed the presence of distinct genetic groups related to geographic origin and grain color.