Selection and Breeding of Low Heavy Metal Accumulating Cultivars to Minimize Heavy Metal Accumulation

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

Deadline for manuscript submissions: closed (31 December 2024) | Viewed by 1327

Special Issue Editor


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Guest Editor
China National Rice Research Institute, Hangzhou 310006, China
Interests: heavy metal accumulation; low accumulating cultivars; variety selection; breeding methodologies; functional molecular markers

Special Issue Information

Dear Colleagues,

Heavy metals are significant environmental contaminants in soils, posing a serious threat to food security and human health through the food chain. The selection and breeding of plant cultivars with low heavy metal accumulation has been considered as a cost-effective approach to ensure food safety in low- to medium-level contaminated soils. This Special Issue aims to provide a brief overview of breeding methodologies and strategies for low heavy metal-accumulating crops. We welcome reviews and research papers on the following topics: genetic variation in heavy metal accumulation among species and cultivars, identification of the functional genes and their allelic variations involved in heavy metal accumulation, development and application of the functional molecular markers for low heavy metal accumulation in crops.

Dr. Zhenzhen Cao
Guest Editor

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Keywords

  • low heavy metal-accumulating crops
  • selection
  • breeding
  • functional gene
  • allelic variations
  • molecular markers

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Published Papers (1 paper)

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Research

19 pages, 2930 KiB  
Article
Novel Genomic Regions and Gene Models Controlling Copper and Cadmium Stress Tolerance in Wheat Seedlings
by Amira M. I. Mourad, Sara Baghdady, Fatma Al-Zahraa M. Abdel-Aleem, Randa M. Jazeri and Andreas Börner
Agronomy 2024, 14(12), 2876; https://doi.org/10.3390/agronomy14122876 - 3 Dec 2024
Cited by 1 | Viewed by 1072
Abstract
Heavy metal pollution is a global issue that affects plant growth and human health. Copper and cadmium are two significant heavy metals that have become more concentrated in many soils. These metals are taken up by many plants, including wheat, and can cause [...] Read more.
Heavy metal pollution is a global issue that affects plant growth and human health. Copper and cadmium are two significant heavy metals that have become more concentrated in many soils. These metals are taken up by many plants, including wheat, and can cause various diseases in humans. The most effective way to mitigate the harmful effects of heavy metals is to grow tolerant wheat genotypes. In the current study, two different pot experiments were conducted to understand the genetic control of copper and cadmium tolerance in wheat seedlings. Two populations were used in this study, consisting of 92 genotypes for the copper experiment and 73 genotypes for the cadmium experiment. In both experiments, a replicated complete block design with three replications was used. Highly significant differences were found between the tested genotypes for all studied traits in both metals, except for root weight and the ratio between shoot weight and root weight under cadmium contamination. Single-marker analysis was performed for all significant traits, and a total of 265 and 381 markers were found to be significantly associated with seedling traits under copper and cadmium conditions, respectively. Of these markers, only eight were commonly associated with the tolerance to both metals. These markers were located within five different gene models that were functionally annotated to control heavy metal tolerance. Gene enrichment of the five identified genes revealed two key genes that significantly influenced eight biological processes, six molecular functions, and three Kyoto Ecyclopedia of Genes and Genomes (KEGG) pathways involved in heavy metal tolerance. The sources of the eight markers and their associated genes were identified in twelve genotypes, including one Egyptian and one Kazakhstani genotype, which showed superior responses to copper and cadmium, respectively. These genes and the genotypes carrying them are crucial for future breeding programs aimed at enhancing heavy metal tolerance in wheat. Full article
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