Article
Plant Sciences
Rudra Bhattarai, Hui Liu, Kadambot H. M. Siddique, Guijun Yan
Summary: Breeding metribuzin-resistant wheat through genetic improvement is crucial for weed control in wheat production. A major QTL on wheat chromosome 4A has been identified as responsible for a significant portion of metribuzin resistance. Near-isogenic lines (NILs) play a key role in converting quantitative traits into Mendelian factors for better resolution of the QTL.
Article
Agronomy
Abraham Guerrero-Corona, Fernando Santacruz Ruvalcaba, Jose Alberto Sanchez Nuno, Gustavo Moya Raygoza, Jose Ariel Ruiz Corral, Lino De la Cruz Larios
Summary: The study aimed to improve maize resistance to gray leaf spot disease using wild germplasm, resulting in the development of 116 NILs with higher resistance, with T1662 showing the greatest resistance. Furthermore, the study identified a positive correlation between resistance to gray leaf spot and later flowering time and lower grain yield in the NILs.
Article
Agronomy
Shankarappa Varalakshmi, Smrutishree Sahoo, Narendra Kumar Singh, Navneet Pareek, Priya Garkoti, Velmurugan Senthilkumar, Shruti Kashyap, Jai Prakash Jaiswal, Sherry Rachel Jacob, Amol N. Nankar
Summary: This study investigates the protein content and its association with DNA markers in different maize accessions. It shows that wild relatives of maize have higher protein content and can be used as potential donor parents to increase the protein content of maize.
Article
Biochemistry & Molecular Biology
Takaki Yamauchi, Mikio Nakazono
Summary: Aerenchyma formation is crucial for oxygen diffusion in rice roots under low-oxygen conditions. Both ethylene and auxin hormones are involved in regulating aerenchyma formation in rice roots. The study found that ethylene-dependent aerenchyma formation is faster and rice roots have more aerenchyma, enabling efficient oxygen diffusion under low-oxygen conditions. Additionally, in rice, the expression levels of ethylene biosynthesis and responsive genes rapidly increase after root-cell emergence, contributing to the rapid induction of ethylene-dependent aerenchyma formation.
Article
Plant Sciences
Dang Van Duyen, Youngho Kwon, Nkulu Rolly Kabange, Ji-Yoon Lee, So-Myeong Lee, Ju-Won Kang, Hyeonjin Park, Jin-Kyung Cha, Jun-Hyeon Cho, Dongjin Shin, Jong-Hee Lee
Summary: This study evaluated the root growth and radial oxygen loss (ROL) rate in response to iron (II) sulfide (FeS) in rice and found differences in these traits between parental lines and derived population. QTL analysis identified genetic loci associated with the control of ROL and root area, as well as genes involved in stress signaling, defense response mechanisms, and transcriptional regulation. This study provides new insights and approaches for understanding the regulation of ROL in rice.
Article
Plant Sciences
Jianqin Xu, Xiaoyang Zhu, Fang Yan, Huaqing Zhu, Xiuyu Zhou, Futong Yu
Summary: This study compared Fe-efficient and Fe-inefficient maize inbred lines to reveal physiological and genetic responses to low Fe stress, finding that supplying ammonium nitrate and nitrate nitrogen can promote maize growth and lower root Fe concentration.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Agronomy
Xin Wang, Changjian Liao, Xiaojun Wang, Ruichun Yang, Lihong Zhai, Jun Huang
Summary: This study constructed a maize-teosinte introgression line population using the maize inbred line B73 and teosinte subspecies K67-11, and performed genotype analysis and QTL mapping to reveal the genetic loci controlling traits. The results identified valuable regions in the genome associated with important agronomic traits in maize, providing insights for fine-mapping and marker-assisted breeding in maize.
Article
Agronomy
Jun Zhang, Samuel Clay McDonald, Chengjun Wu, Miles W. Ingwers, Hussein Abdel-Haleem, Pengyin Chen, Zenglu Li
Summary: Flooding tolerance in soybean is a complex trait controlled by multiple QTLs and significantly affected by QTL x environment interactions. The results of this study provide valuable information for soybean breeders to develop flooding tolerant cultivars.
Article
Plant Sciences
Guangfei Zhou, Shunfa Li, Liang Ma, Fang Wang, Fuyan Jiang, Yali Sun, Xinsen Ruan, Yu Cao, Qing Wang, Yingying Zhang, Xingming Fan, Xiquan Gao
Summary: This study identified multiple minor-effect QTLs involved in the genetic component of resistance to Gibberella ear rot (GER), with both additive and epistatic effects contributing to the genetic architecture of resistance. A novel QTL, qGER4.09, was found to potentially confer resistance to multiple pathogens and could be utilized in breeding maize varieties for improved resistance to ear rot diseases.
Article
Plant Sciences
Sanjeev Kumar Dhungana, Ji-Hee Park, Jae-Hyeon Oh, Beom-Kyu Kang, Jeong-Hyun Seo, Jung-Sook Sung, Hong-Sik Kim, Sang-Ouk Shin, In-Youl Baek, Chan-Sik Jung
Summary: This study identified 10 QTLs for drought tolerance in soybean using a recombinant inbred line population developed from a cross between a drought-tolerant and a susceptible cultivar. The QTLs were found on seven chromosomes, with some overlapping or located close to previously reported related QTLs and/or potential candidate genes. These QTLs and closely linked markers could be used in marker-assisted selection to accelerate breeding for drought tolerance in soybean.
Article
Microbiology
Abdelraheem Abdelraheem, Yi Zhu, Jinfa Zhang
Summary: This study identified significant genotypic variations for FOV4 resistance in 163 recombinant inbred lines (RILs) of Pima cotton. Five and four quantitative trait loci (QTL) on six chromosomes were detected in two replicated tests, with three QTL in common between the two tests. The heritability estimate for FOV4 resistance was 0.65, indicating a considerable genetic contribution to the phenotypic variation.
Article
Agronomy
Xiaogang Liu, Xiaojiao Hu, Kun Li, Zhifang Liu, Yujin Wu, Guang Feng, Changling Huang, Hongwu Wang
Summary: This study used a recombinant inbred line population to explore the genetic basis of yield-related traits in maize by evaluating general combining ability effects and identifying quantitative trait loci. The results showed that GCA has a higher heritability in early breeding generation, which can effectively select superior breeding materials. Although different inbred lines were appointed as testers, the genetic basis of GCA remains nearly constant.
Article
Plant Sciences
Wenfeng Pei, Jikun Song, Wenkui Wang, Jianjiang Ma, Bing Jia, Luyao Wu, Man Wu, Quanjia Chen, Qin Qin, Haiyong Zhu, Chengcheng Hu, Hai Lei, Xuefei Gao, Haijun Hu, Yu Zhang, Jinfa Zhang, Jiwen Yu, Yanying Qu
Summary: In this study, 25 MIC QTLs were identified in Gossypium barbadense using a population of 250 backcross inbred lines (BILs) and a high-density genetic map. Two stable MIC QTLs were discovered, along with 8 candidate genes with differential expression. This research provides valuable insights for improving MIC in cotton breeding.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Plant Sciences
Hui Hu, Ruoyu Gao, Liping He, Famao Liang, Zhixin Li, Junying Xu, Longwei Yang, Chongrong Wang, Zhangyong Liu, Jianlong Xu, Xianjin Qiu
Summary: This study focused on the ratooning ability of rice and identified several main-effect QTLs, including qRA5 on chromosome 5, which has pleiotropic effects on multiple ratooning-related traits. The results provide important insights into the genetic basis of rice ratooning ability and offer valuable gene resources for breeding high-yield ratoon rice varieties.
Article
Plant Sciences
Jing Wen, Yanqi Shen, Yuexian Xing, Ziyu Wang, Siping Han, Shijie Li, Chunming Yang, Dongyun Hao, Yan Zhang
Summary: In this study, maize ear rot caused by Fusarium verticillioides was genetically mapped in three F-2 populations using F-2:3 families derived from resistant and susceptible parental lines. High heritability estimates indicated the significant role of genetic factors in phenotypic variation, with a total of 20 resistance QTLs identified in the populations. QTLs with large effects from resistant parents were found, indicating potential hotspots for resistance. These identified QTLs can be utilized for marker-assisted selection to improve ear rot resistance in maize.
