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Agriculture
Special Issues
Characterization, Evaluation, and Utilization of Crop Germplasm Resources
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Characterization, Evaluation, and Utilization of Crop Germplasm Resources

A special issue of Agriculture (ISSN 2077-0472). This special issue belongs to the section "Crop Genetics, Genomics and Breeding".

Deadline for manuscript submissions: closed (25 October 2024) | Viewed by 4158

Special Issue Editor

Dr. Tao Chen

E-Mail Website
Guest Editor
College of Life Science, Sichuan Agricultural University, Ya'an 625014, China
Interests: germplasm; phenotype; genetic diversity; molecular markers; population structure

Special Issue Information

Dear Colleagues,

Crop germplasm resources, including wild relatives, landrace, traditional varieties, and farmer’s varieties, encompass a vast array of genetic variations that serve as the primary gene pool for enhancing crop diversity and genetic improvement. However, with the intensification of urbanization and the expansion of the scope of human activities, the habitats of almost all crop germplasm resources have been severely compromised, leading to the premature extinction of numerous invaluable genetic resources before their full recognition by humanity. Consequently, there is an urgent need to prioritize research on investigating, collecting, evaluating, developing and utilizing crop germplasm resources.

The primary objective of this Special Issue is to showcase innovative research and comprehensive review articles focusing on global crop genetic resources, encompassing fields such as agronomy, horticulture, Chinese herbal medicine, forage production, and economic forest crops. This Special Issue invites the submission of papers addressing a wide range of relevant topics, including, but not limited to, the characterization of crop germplasm diversity via the application of genomics, phenomics or molecular markers; the evaluation of genetic diversity using various genetic markers; comparative studies on different molecular marker systems for assessing the genetic structure of germplasm or populations; and the development and utilization of novel molecular markers in establishing reference sets or core sets in the germplasm.

Dr. Tao Chen
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. Agriculture is an international peer-reviewed open access semimonthly 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

  • crop
  • germplasm
  • genetic diversity
  • genotyping
  • phenotyping
  • molecular markers
  • population structure

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

18 pages, 4314 KiB  
Article
Performance of Camellia oleifera Seedlings Under Alkali Stress Improved by Spraying with Types of Exogenous Biostimulants
by Qingbo Kong, Shiheng Zheng, Wei Li, Heng Liang, Lijun Zhou, Hongyu Yang, Xiaoyu Jiang, Shiling Feng, Tao Chen and Chunbang Ding
Agriculture 2025, 15(3), 274; https://doi.org/10.3390/agriculture15030274 - 27 Jan 2025
Viewed by 635
Abstract
Exogenous biostimulants (EB) are crucial for reducing abiotic stress in plants. It is currently unclear how EB such as melatonin (MT), betaine (BA), and salicylic acid (SA) regulate the stress in Camellia oleifera seedlings under alkali stress (XP). This study demonstrates the moderating [...] Read more.
Exogenous biostimulants (EB) are crucial for reducing abiotic stress in plants. It is currently unclear how EB such as melatonin (MT), betaine (BA), and salicylic acid (SA) regulate the stress in Camellia oleifera seedlings under alkali stress (XP). This study demonstrates the moderating effect of SA (0.5, 1, and 2 mmol/L), BA (0.2, 0.4, and 0.8 g/L), and MT (200, 400, and 800 μmol/L) on the relative chlorophyll content, photosynthetic parameters, chlorophyll fluorescence parameters, osmoregulatory substances, and antioxidant enzymes in C. oleifera seedlings under XP. The results showed that spraying different types and different concentrations of EB under alkali stress had a certain alleviating effect on the phenotype of C. oleifera seedlings. Whether 7 or 15 days after the application of EB, the relative chlorophyll content (SPAD) and the degree of yellowish-green in the control group were different from those in the other 10 treatment groups, but the difference in brightness was not significant. As far as the malondialdehyde (MDA) content is concerned, the SA2, BA3, MT2, and MT3 treatment groups can significantly reduce the MDA content on the 7th day of EB application. The electrolytic leakage (EL) is also significantly reduced by MT2 and MT3. It was found that treatment groups SA3 and MT2 could improve the photosynthetic parameters of C. oleifera seedlings to different degrees on the 7th day of EB application. On the 15th day of EB application, treatment groups SA1, SA3, BA1, and BA2 all increased the photosynthetic rate of C. oleifera compared to the XP treatment group, but other treatments did not increase. At the same time, the results showed that the fluorescence parameters of the seedlings showed different degrees of improvement under different EB spraying conditions. Under alkali stress, soluble proteins (SP) and soluble sugars (SS) increased in the XP group, but it was found that the SA3, BA3, and MT2 treatment groups could reduce the content of osmoregulatory substances both on the 7th and 15th days of EB application. In terms of proline (Pro) content, BA1, BA2, and MT2 treatment groups could reduce Pro content on the 7th and 15th days of EB spraying, respectively. As for the antioxidant enzymes, the SA2, BA3, MT2, and MT3 treatment groups could basically increase the activity of antioxidant enzymes and further reduce oxidative damage on the 7th day of application of EB. According to the comprehensive results of the membership function, whether on the 7th or 15th day of EB spraying, the MT2 treatment group has the best overall mitigation effect of the three EB applications, ranking in the top three. This study will help to improve the scientific understanding of C. oleifera’s alkali resistance and interaction with EB while filling the knowledge gap on the physiological response to oleofylline stress. Full article
(This article belongs to the Special Issue Characterization, Evaluation, and Utilization of Crop Germplasm Resources)
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15 pages, 1134 KiB  
Article
Genetic Variability and Interrelationships of Grain, Cooking, and Nutritional Quality Traits in Cowpea: Implications for Cowpea Improvement
by Michael M. Chipeta, Esnart Yohane, John Kafwambira and Jessica Kampanje-Phiri
Agriculture 2024, 14(4), 633; https://doi.org/10.3390/agriculture14040633 - 19 Apr 2024
Cited by 2 | Viewed by 2723
Abstract
Grain quality, cooking quality, and nutritional quality traits are some of the major attributes that enhance the uptake and utilization of improved cowpea varieties. Therefore, there is a need for a better understanding of the genetic variation and inter-relationships among these quality traits [...] Read more.
Grain quality, cooking quality, and nutritional quality traits are some of the major attributes that enhance the uptake and utilization of improved cowpea varieties. Therefore, there is a need for a better understanding of the genetic variation and inter-relationships among these quality traits in cowpeas to integrate them into cowpea breeding programs. This study was conducted to determine genetic variability among 306 cowpea genotypes for grain quality, cooking quality, and nutritional quality traits and to understand the interrelationships among these traits for exploitation in breeding programs. The results showed highly significant differences (p < 0.001) among genotypes for grain quality, cooking quality, and nutritional quality traits. The mean performance for these quality traits was also very variable. These results suggest that genetic variability exists in the cowpea genotypes studied, which can be exploited in breeding programs aimed at developing high-performing varieties for the said traits. Significant (p < 0.001) positive correlations were detected for protein content with iron and zinc. On the other hand, nutritional quality traits did not exhibit any association with grain quality or cooking quality traits. Cooking quality traits were also shown to be significantly and positively correlated with grain quality traits. This study has identified several genotypes with desirable quality-related traits that could be used in crossing programs to generate improved varieties with consumer-preferred traits to improve the food, income, and nutritional status of many smallholder farmers that largely depend on cowpeas. Full article
(This article belongs to the Special Issue Characterization, Evaluation, and Utilization of Crop Germplasm Resources)
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