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Agronomy
Special Issues
New Insights in Soybean Germplasm Resources, Genetic Breeding and Production
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New Insights in Soybean Germplasm Resources, Genetic Breeding and Production

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

Deadline for manuscript submissions: 31 August 2024 | Viewed by 1845

Special Issue Editor

Dr. Guangnan Xing

E-Mail Website
Guest Editor
National Center for Soybean Improvement, Nanjing Agricultural University, Nanjing 210095, China
Interests: soybean germplasm resources; insect-resistant breeding
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Soybean (Glycine max (L.) Merr.), as an economically important food and oilseed crop, is an important part of sustainable farming systems. However, genetic bottlenecks arising during domestication and modern breeding have limited improvements in this crop. To address the various biotic and abiotic stresses faced in soybean production and increase yield, exploiting soybean’s excellent genetic resources and genes is a major priority for its genetic breeding.

Remarkable progress has been made by scientists in the fields of soybean genetics, genomics, molecular biology, breeding and biotechnology. In addition, in order to stimulate the development of breeding technology to improve the agronomic traits of soybean, in-depth research on gene function, signaling networks and regulation mechanisms is necessary. Although its application in soybean breeding and breed improvement is currently limited, we believe that research in this area hasenormous potential for development in future breeding. Therefore, we expect that molecular breeding approaches will be more extensively studied and used in the genetic improvement of soybean.

This Special Issue will cover basic and application-oriented studies that support and facilitate soybean genetics and breeding research. Both research and review articles are welcomed. Potential topics include, but are not limited to, the following:

  • QTL mapping and marker-assisted selection;
  • GWAS and genomic selection/prediction;
  • Molecular breeding by design;
  • Genotype–environment interactions;
  • Breeding for tolerance to abiotic and biotic stresses;
  • Varietal and agrotechnical progress;
  • Identification of key genes regulating yield-related traits;
  • Production in various farming systems;
  • Seed quality and nutritional and fodder value;
  • Food and feed safety;
  • Crop profitability and other economic aspects.

Dr. Guangnan Xing
Guest Editor

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

  • soybean
  • genetics
  • genome
  • sequencing
  • mapping
  • genetic diversity
  • molecular marker
  • biotic and abiotic stress
  • seed production
  • nitrogen fixation
  • food safety
  • profitability of soybean cultivation

Published Papers (3 papers)

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Research

16 pages, 10810 KiB  
Article
Positive Correlation of Lodging Resistance and Soybean Yield under the Influence of Uniconazole
by Chao Yan, Fuxin Shan, Chang Wang, Xiaochen Lyu, Yuanyi Wu, Shuangshuang Yan and Chunmei Ma
Agronomy 2024, 14(4), 754; https://0-doi-org.brum.beds.ac.uk/10.3390/agronomy14040754 - 05 Apr 2024
Viewed by 462
Abstract
Increasing planting density is one of the most effective ways to increase soybean yield, but supra-optimum density leads to an increase in the risk of lodged soybean. In this study, two varieties were selected. Heinong84 (lodging-susceptible variety, HN84) had planting densities of 200,000 [...] Read more.
Increasing planting density is one of the most effective ways to increase soybean yield, but supra-optimum density leads to an increase in the risk of lodged soybean. In this study, two varieties were selected. Heinong84 (lodging-susceptible variety, HN84) had planting densities of 200,000 plants/hm2, 300,000 plants/hm2, and 400,000 plants/hm2. Henong60 (lodging-resistant, HN60) had planting densities of 300,000 plants/hm2, 400,000 plants/hm2, and 500,000 plants/hm2. When the foliar application of uniconazole (50 mg/L) occurred at the beginning of the flowering stage (R1), the plant morphology, fiber composition, and mechanical properties of soybean internodes were determined at the podding and seed filling stages, and the yield was measured at the harvest stage. The results showed that spraying uniconazole at the R1 stage changed the morphology structure of soybean plants (i.e., plant height and petiole length reduction; stem diameter and leafstalk angle increase), improved the internode quality (i.e., increased breaking force, lignin content, cellulose content, hemicellulose content, and stem dry weight per unit length), and increased the number of grains per plant at the harvest stage. Thus, it is concluded that the application of uniconazole improved the plant population structure by changing the morphology of soybean plants, which was conducive to good light transmission and ventilation, improved the internode quality and lodging resistance, and increased the yield. Full article
(This article belongs to the Special Issue New Insights in Soybean Germplasm Resources, Genetic Breeding and Production)
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20 pages, 2330 KiB  
Article
Comprehensive Identification of Main, Environment Interaction and Epistasis Quantitative Trait Nucleotides for 100-Seed Weight in Soybean (Glycine max (L.) Merr.)
by Li Wang, Benjamin Karikari, Hu Zhang, Chunting Zhang, Zili Wang, Tuanjie Zhao and Jianying Feng
Agronomy 2024, 14(3), 483; https://0-doi-org.brum.beds.ac.uk/10.3390/agronomy14030483 - 28 Feb 2024
Viewed by 538
Abstract
Soybean hundred seed weight (HSW) is a complex quantitative trait affected by multiple genes and environmental factors. To date, a large number of quantitative trait nucleotides (QTNs) have been reported, but less information on QTN-by-environment interactions (QEIs) and QTN-QTN interaction (QQIs) for soybean [...] Read more.
Soybean hundred seed weight (HSW) is a complex quantitative trait affected by multiple genes and environmental factors. To date, a large number of quantitative trait nucleotides (QTNs) have been reported, but less information on QTN-by-environment interactions (QEIs) and QTN-QTN interaction (QQIs) for soybean HSW is available. Mapping without QEIs and QQIs result in missing some important QTNs that are significantly related to HSW. Therefore, the present study conducted genome-wide association analysis to map main QTNs, QEIs and QQIs for HSW in a panel with 573 diverse soybean lines tested in three independent environments (E1, E2 and E3) with Mean- and best linear unbiased value (BLUP)- phenotype. In all, 147 main effect QTNs, 11 QEIs, and 24 pairs of QQIs were detected in the Mean-phenotype, and 138 main effect QTNs, 13 QEIs, and 27 pairs of QQIs in the BLUP-phenotype. The total phenotypic variation explained by the main effect QTNs, QEIs, and QQIs were 35.31–39.71, 8.52–8.89 and 34.77–35.09%, respectively, indicating an important role of non-additive effects on HSW. Out of these, 33 QTNs were considered as stable with 23 colocalized with previously known loci, while 10 were novel QTNs. In addition, 10 pairs stable QQIs were simultaneously detected in the two phenotypes. Based on homolog search in Arabidopsis thaliana and in silico transcriptome data, seven genes (Glyma13g42310, Glyma13g42320, Glyma08g19580, Glyma13g44020, Glyma13g43800, Glyma17g16620 and Glyma07g08950) from some main-QTNs and two genes (Glyma06g19000 and Glyma17g09110) of QQIs were identified as potential candidate genes, however their functional role warrant further screening and functional validation. Our results shed light on the involvement of QEIs and QQIs in regulating HSW in soybean, and these together with candidate genes identified would be valuable genomic resources in developing soybean cultivars with desirable seed weight. Full article
(This article belongs to the Special Issue New Insights in Soybean Germplasm Resources, Genetic Breeding and Production)
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16 pages, 2612 KiB  
Article
Effect of Different Sowing Seasons, Growth Stages, Leaf Positions, and Soybean Varieties on the Growth of Clanis bilineata tsingtauica Mell Larvae
by Nan Liu, Yulu Yan, Longwei Yang, Yufei Xu, Huiyan Jiang, Zhihao Ye, Hao Wang, Junyi Gai and Guangnan Xing
Agronomy 2024, 14(2), 397; https://0-doi-org.brum.beds.ac.uk/10.3390/agronomy14020397 - 19 Feb 2024
Viewed by 644
Abstract
Clanis bilineata tsingtauica Mell (Lepidoptera: Sphingidae, CBT), as a traditional edible insect, is becoming popular in China due to its high nutritional value, but production needs to be improved to meet the expanding market. In the present study, CBT eggs were artificially inoculated [...] Read more.
Clanis bilineata tsingtauica Mell (Lepidoptera: Sphingidae, CBT), as a traditional edible insect, is becoming popular in China due to its high nutritional value, but production needs to be improved to meet the expanding market. In the present study, CBT eggs were artificially inoculated on soybean leaves to evaluate the effects of leaf position, growth stage, sowing season, and soybean variety on CBT larval growth, respectively. The results showed that (1) the larval weight and survival rate were poorly correlated, so they could represent two different larval growth and development indicators for CBT. The 21-day-old larval weight was significantly different between the sowing seasons and between soybean growth stages, which was suitable as a key indicator for evaluating CBT larval rearing factors. (2) Compared with autumn-sown soybeans, the weight of 21-day-old larvae feeding on V6 stage (sixth trifoliolate) leaves of summer-sown soybeans was significantly higher, with an average increase of 44.7%. (3) Under autumn sowing conditions, the weight of 21-day-old larvae feeding on soybeans in the V6 stage was significantly higher than those fed on soybeans in the R3 stage (beginning pod), increasing by 33.9%. (4) Under summer sowing conditions, the weight of 21-day-old larvae feeding on the third-top leaf (the third leaf from the top of the soybeans’ main stem) was significantly higher than those feeding on the third-bottom leaf (the third leaf from the bottom of the soybeans’ main stem) at V6 stage by 35.7%. Similar results also appeared in autumn sowing; the average weights of 21-day-old larvae feeding on the third-top leaf increased significantly by 29.9% compared to those feeding on the third-bottom leaf. Moreover, the survival rate of larvae fed with the third-top leaf was significantly higher than that of those fed with the third-bottom leaf at the V6 stage in autumn sowing. Leaf position is the main factor affecting the survival rate of larvae. (5) Under summer sowing conditions, the weights of larvae fed with the third-top leaf of the susceptible-soybean varieties NN89-29 and NN1138-2 were significantly higher than that of those fed with the third-bottom leaf of these varieties. This difference was significantly reduced with autumn sowing. In conclusion, the CBT eggs inoculated on the third-top leaf of NN89-29 and NN1138-2 at the V6 stage in summer sowing could achieve maximum larval yield. Full article
(This article belongs to the Special Issue New Insights in Soybean Germplasm Resources, Genetic Breeding and Production)
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