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Special Issue "Genetic Dissection and Improvement of Crop Traits"

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A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Crop Breeding and Genetics".

Deadline for manuscript submissions: 31 December 2023 | Viewed by 2779

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Special Issue Editors

Dr. Hongwei Zhang

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Guest Editor

Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
Interests: QTL mapping and cloning; genomic prediction; regulatory network

Dr. Riliang Gu

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Guest Editor

Centor of Seed Science and Technology, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
Interests: genotype; best linear unbiased prediction; breeding value
Special Issues, Collections and Topics in MDPI journals

Dr. Kun Li

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Guest Editor

Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Interests: genetics, germplasm, maize breeding
Special Issues, Collections and Topics in MDPI journals

Dr. Xuehai Zhang
E-Mail Website
Guest Editor

College of Agronomy, Henan Agricultural University, Zhengzhou, China
Interests: plant genetics

Special Issue Information

Dear Colleagues,

With the advancements of various biotechnology tools, great breakthroughs in the dissection of crop traits are expected in the next few years. The publicly available functional markers and genes further boost the prediction and improvement of crop traits.

This Special Issue aims to provide a platform for crop researchers to discuss the progress of crop dissection and improvement, and to share their interesting research stories on a wide spectrum of cutting-edge research topics, which include but are not limited to:

Genetic dissection of various traits, including QTL mapping and genome-wide association;
Genomic prediction methods, models, and cases;
QTL introgression and evaluation;
Genotypic by environment interactions;
Omic-based analysis of variations of crop traits;
Mining natural alleles and creating/editing favorable alleles of functional genes;
The influences of functional genes on crop traits;
Physiological investigation of crop traits.

We welcome articles, reviews, methods, techniques, and opinions on the above-mentioned topics.

Dr. Hongwei Zhang
Dr. Riliang Gu
Dr. Kun Li
Dr. Xuehai Zhang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Agronomy is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

omic data
crop traits
genetic dissection
genomic prediction
functional genes

Published Papers (3 papers)

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Research

15 pages, 3979 KiB

Open AccessArticle

Historical Trends Analysis of Main Agronomic Traits in South China Inbred Indica Rice Varieties since Dwarf Breeding

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Agronomy 2023, 13(8), 2159; https://doi.org/10.3390/agronomy13082159 - 17 Aug 2023

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Abstract

Studying the evolutionary patterns of rice agronomic traits in South China and analyzing the characteristics of rice improvement can provide insights into the developmental trajectory of rice breeding in South China and can guide further enhancement of variety yield. In this study, widely promoted varieties and core parents developed through dwarf breeding in the southern region, as well as landraces, were collected and planted in three different ecological regions. A total of 18 agronomic traits were investigated related to heading date, plant type, panicle type, grain type, and yield, and multiple comparisons, a correlation analysis, and a path analysis were conducted. The results indicate that dwarf breeding has significantly increased the yield of inbred indica rice varieties in South China. However, a reduction in plant height has also resulted in a reduction in flag leaf, shorter panicles, and decreased biomass, which have led to metabolic source and storage capacity deficiencies and limited yield potential. To address these limitations, breeders have employed strategies such as increasing flag leaf width, spikelet density, number of primary branches, and grain number per panicle. These measures have led to a gradual increase in yield. Additionally, starting from the 1980s, high-quality rice breeding has been pursued in South China, resulting in slender grain shape and reduced thousand grain weight. Given that total grain number per panicle has already increased significantly and the thousand grain weight cannot be reduced further, enhancing the effective tiller number, which decreases year by year, becomes an important approach to increasing the yield of inbred indica rice varieties in South China. Full article

(This article belongs to the Special Issue Genetic Dissection and Improvement of Crop Traits)

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11 pages, 1817 KiB

Open AccessArticle

Over-Expression of ZmIAA29, an AUX/IAA Transcription Factor, Improved Maize Flowering Time

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Agronomy 2023, 13(8), 2028; https://doi.org/10.3390/agronomy13082028 - 31 Jul 2023

Viewed by 720

Abstract

Maize is one of the most important food and feed crops in China due to the high demand for its use by both humans and animals. The Huang-Huai-Hai region is a major maize cultivation area in China, and the special cropping rotation system of wheat and maize requires a suitable reproductive period for maize. The AUX/IAA and ARF transcription factors are two key genes that regulate auxin signals in plants, which play an important role during the process of auxin regulation in plant growth and development. In this study, we obtained two overexpressed lines of ZmIAA29 belonging to the AUX/IAA transcription factor family. Compared with the Wide type, the overexpressed strains of ZmIAA29 were significantly regulated in maize during the flowering time and had increased ear weight. Moreover, ZmIAA29 was assayed via the yeast two-hybrid and BiLUC systems for interaction, and the results showed that ZmIAA29 interacted with several ZmARF transcription factors. Furthermore, RNA-seq and DAP-seq analysis revealed that ZmIAA29 regulates maize growth and development by influencing pathways such as those for plant signal transduction and the key genes related to maize flowering. Taken together, our results suggest that ZmIAA29 plays a key role in the development of maize flowering. This study provides new insight for better understanding the combined regulation of the AUX/IAA and ARF transcription factors during flowering time in maize. Full article

(This article belongs to the Special Issue Genetic Dissection and Improvement of Crop Traits)

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13 pages, 3327 KiB

Open AccessArticle

Genome-Wide Association Study for Fusarium Head Blight Resistance in Common Wheat from China

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Agronomy 2023, 13(7), 1712; https://doi.org/10.3390/agronomy13071712 - 26 Jun 2023

Viewed by 924

Abstract

As a devastating wheat disease, Fusarium head blight (FHB) causes large losses in yield and quality. The purpose of this study was to detect the genetic loci for FHB resistance based on a genome-wide association study (GWAS) using two panels genotyped by the Wheat 660 K SNP array and Wheat 90 K SNP array. Phenotypic investigation results showed that 43.6–51.6% of the test varieties showed an infection type of more than 3, indicating that substantial improvement in the level of resistance was urgently required. GWAS detected 1264 SNPs associated with FHB response distributed on all wheat chromosomes. Fourteen QTL were stably detected in two environments. gFHB-1B (582.9~607.9 Mb on chromosome 1B) and gFHB-5A (577.9~596.5 Mb on 5A) were two novel resistance loci that were detected in two wheat panels. Haplotype analysis of both gFHB-1B and gFHB-5A indicated that varieties with gFHB-1B_R and gFHB-5A_R had consistently less FHB than varieties carrying a one or no resistance QTL. The application frequency of the FHB-resistant alleles gFHB-1B and gFHB-5A showed a gradually decreasing trend in FHB resistance breeding. This study identified new genetic loci for the control of FHB and provides useful information for marker-assisted selection in wheat FHB resistance. Full article

(This article belongs to the Special Issue Genetic Dissection and Improvement of Crop Traits)

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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Genetic dissection of maize heterosis using testcross populations contructed using elite inbred lines of China
Authors: Hongwei Zhang
Affiliation: Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China

Title: QTL mapping and QTL by environment interaction analysis of plant architecture traits in maize
Authors: Pingxi Wang
Affiliation: caas

Title: Genetic mapping of cell wall related traits in two maize recombinant inbred line populations
Authors: Kun Li
Affiliation: caas

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Special Issue "Genetic Dissection and Improvement of Crop Traits"

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