Genetic dissection of maize seedling traits in an IBM Syn10 DH population under the combined stress of lead and cadmium

2021 ◽  
Author(s):  
Fengxia Hou ◽  
Xun Zhou ◽  
Peng Liu ◽  
Guangsheng Yuan ◽  
Chaoying Zou ◽  
...  
Keyword(s):  
Maize Seedling ◽  
Genetic Dissection ◽  
Combined Stress ◽  
Dh Population ◽  
Seedling Traits ◽  
Lead And Cadmium

scholarly journals Genetic Dissection of Resistance to Common Rust (Puccinia Sorghi) in Tropical Maize (Zea mays L.) by Combined Genetic Mapping and Genomic Prediction

2020 ◽  
Author(s):  
Xuecai Zhang ◽  
Jiaojiao Ren ◽  
Zhimin Li ◽  
Penghao Wu ◽  
Alexander Loladze ◽  
...  
Keyword(s):  
Genomic Prediction ◽  
Linkage Mapping ◽  
Rust Resistance ◽  
Genome Wide Association Study ◽  
Genetic Dissection ◽  
Nucleotide Polymorphisms ◽  
Maize Breeding ◽  
Dh Population ◽  
Association Panel ◽  
Maize Varieties

Abstract Background: Common rust is one of the major foliar diseases of maize, leading to significant grain yield losses and poor grain quality. The most sustainable strategy for controlling common rust is to develop resistant maize varieties, which requires a further understanding of genetic dissection of common rust resistance. Results: In this study, an association panel and two bi-parental doubled haploid (DH) populations were used to perform genome-wide association study (GWAS), linkage mapping, and genomic prediction analyses. All the populations were phenotyped in multi-environment trials for common rust resistance and genotyped with genotyping-by-sequencing (GBS) single-nucleotide polymorphisms (SNPs). GWAS revealed six SNPs significantly associated with common rust resistance at bins 1.05, 1.10, 3.04, 3.05, 4.08, and 10.04, respectively. The SNP effect of each SNP ranged from 0.13 to 0.17. Linkage mapping identified six quantitative trait loci (QTL) in the first DH population (DH1) and two QTL in the second DH population (DH2), distributed on chromosomes 1, 2, 3, 4, 6, 7, and 9, respectively. The phenotypic variation explained (PVE) of each QTL ranged from 3.55% to 12.45%. A new major QTL was detected in DH1 on chromosome 7 in the region between 144,585,945 and 149,528,489 bp, it had the highest LOD score of 7.82 and the largest PVE value of 12.45%. The genomic regions located at bins 1.05, 1.10, and 4.08 were detected by both GWAS and linkage mapping. GRMZM2G114893 (bin 1.05) and GRMZM2G138949 (bin 4.08) were identified as the putative candidate genes conferring common rust resistance. The genomic prediction accuracies observed in the association panel and two bi-parental DH populations were 0.61, 0.51, and 0.10, respectively. Conclusions: These results provided new insight into the genetic architecture of common rust resistance in maize and a better understanding of the application of genomic prediction for common rust resistance in maize breeding.

scholarly journals Genetic dissection of stalk lodging-related traits using an IBM Syn10 DH population in maize across three environments (Zea mays L.)

2019 ◽  
Vol 294 (5) ◽  
pp. 1277-1288 ◽  
Author(s):  
Yanling Zhang ◽  
Tianhu Liang ◽  
Min Chen ◽  
Yinchao Zhang ◽  
Tao Wang ◽  
...  
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Genetic Dissection ◽  
Dh Population ◽  
Stalk Lodging

Characterization of lead-bearing phases in municipal waste combustor fly ash

1996 ◽  
Vol 54 ◽  
pp. 516-517
Author(s):  
L. L. Sutter ◽  
G. R. Dewey ◽  
J. F. Sandell
Keyword(s):  
Fly Ash ◽  
Bottom Ash ◽  
Municipal Waste ◽  
Primary Concern ◽  
Leaching Behavior ◽  
Waste Combustion ◽  
Lead And Cadmium ◽  
Lead Speciation ◽  
Accepted Practice

Municipal waste combustion typically involves both energy recovery as well as volume reduction of municipal solid waste prior to landfilling. However, due to environmental concerns, municipal waste combustion (MWC) has not been a widely accepted practice. A primary concern is the leaching behavior of MWC ash when it is stored in a landfill. The ash consists of a finely divided fly ash fraction (10% by volume) and a coarser bottom ash (90% by volume). Typically, MWC fly ash fails tests used to evaluate leaching behavior due to high amounts of soluble lead and cadmium species. The focus of this study was to identify specific lead bearing phases in MWC fly ash. Detailed information regarding lead speciation is necessary to completely understand the leaching behavior of MWC ash.

Polymorphism of p-450 cytochrome detoxication genes in adolescents depending on the degree of contamination of the organism by heavy metals

2020 ◽  
Vol 99 (5) ◽  
pp. 478-482
Author(s):  
N. P. Setko ◽  
A. G. Setko ◽  
Ekaterina V. Bulycheva ◽  
A. V. Tyurin ◽  
E. Yu. Kalinina
Keyword(s):  
Heavy Metals ◽  
Environmental Factors ◽  
Heavy Metal Contamination ◽  
Atomic Absorption Spectrophotometry ◽  
The Body ◽  
Lead And Cadmium ◽  
Cyp2b6 Gene ◽  
Cytochrome P 450 ◽  
Gene Cyp1a1 ◽  
Group 1

Introduction. Changes in the body of children and adolescents aimed at adapting to environmental factors are determined by genetic polymorphism in xenobiotic biotransformation genes, determining the degree of susceptibility of the child’s body to pollutants, which is the basis of modern personalized preventive medicine when managing risks to the health of the child population under the influence of environmental factors. Material and methods. Trace elements, including heavy metals, lead and cadmium, were determined in the hair of 256 practically healthy teenagers by atomic absorption spectrophotometry. Depending on the level of content of the latter, two groups of adolescents were formed to determine six genes of the cytochrome P-450 family. Group 1 consisted of adolescents whose cadmium lead content exceeded the average Russian indices. The second group included adolescents whose heavy metals were above the level of average Russian standards. Results. Studies have shown that in adolescents of the 1st group, compared with the data of adolescents of the 2nd group, an increase in the number of carriers of two mutant alleles at the locus rs 1048943 (gene CYP1A1) is 3.08 times, rs 464621 (gene CYP1A1) is 1. 8 times; locus rs 2069522 (CYP1A2 gene) 3.63 times; locus rs 1799853 (CYP2C9 * 2 gene) 4.5 times; locus rs 1057910 (gene CYP2C9 * 3) 3.8 times and locus rs 2279343 (gene CYP2B6) 4.25 times. Moreover, carriers of two normal alleles in adolescents of the first group at the locus rs 1048943 (gene CYP1A1) were 5.14 times; locus rs 2279343 (CYP2B6 gene) was 6.5 fold less than among adolescents of the 2nd group; and at the locus rs 464621 (gene CYP1A1), rs 2069522 (gene CYP1A2), rs 1799853 (gene CYP2C9 * 2), rs 1057910 (gene CYP2C9 * 3) there were no carriers of normal homozygotes. Conclusion. Group 1 adolescents with heavy metal contamination of the body are carriers significantly in a greater number of pathological mutations in the genes of the cytochrome P-450 detoxification system in comparison with data from group 2 adolescents.

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