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Start Over Author "Ma, Lixia" Publication Type Academic Journals
295 results on '"Ma, Lixia"'

39. Collinearity Analysis and High-Density Genetic Mapping of the Wheat Powdery Mildew Resistance Gene Pm40 in PI 672538

Author

Zhong, Shengfu, Ma, Lixia, Fatima, Syeda Akash, Yang, Jiezhi, Chen, Wanquan, Liu, Taiguo, Hu, Yuting, Li, Qing, Guo, Jingwei, Zhang, Min, Lei, Li, Li, Xin, Tang, Shengwen, and Luo, Peigao

Subjects
Agricultural, Veterinary and Food Sciences, Plant Biology, Biological Sciences, Genetics, Biotechnology, Human Genome, Brachypodium, Chromosome Mapping, Chromosomes, Plant, Comparative Genomic Hybridization, Disease Resistance, Expressed Sequence Tags, Genetic Linkage, Genotype, Microsatellite Repeats, Oryza, Plant Diseases, Plant Proteins, Sorghum, Triticum, General Science & Technology
Abstract

The wheat powdery mildew resistance gene Pm40, which is located on chromosomal arm 7BS, is effective against nearly all prevalent races of Blumeria graminis f. sp tritici (Bgt) in China and is carried by the common wheat germplasm PI 672538. A set of the F1, F2 and F2:3 populations from the cross of the resistant PI 672538 with the susceptible line L1034 were used to conduct genetic analysis of powdery mildew resistance and construct a high-density linkage map of the Pm40 gene. We constructed a high-density linkage genetic map with a total length of 6.18 cM and average spacing between markers of 0.48 cM.Pm40 is flanked by Xwmc335 and BF291338 at genetic distances of 0.58 cM and 0.26 cM, respectively, in deletion bin C-7BS-1-0.27. Comparative genomic analysis based on EST-STS markers established a high level of collinearity of the Pm40 genomic region with a 1.09-Mbp genomic region on Brachypodium chromosome 3, a 1.16-Mbp genomic region on rice chromosome 8, and a 1.62-Mbp genomic region on sorghum chromosome 7. We further anchored the Pm40 target intervals to the wheat genome sequence. A putative linear index of 85 wheat contigs containing 97 genes on 7BS was constructed. In total, 9 genes could be considered as candidates for the resistances to powdery mildew in the target genomic regions, which encoded proteins that were involved in the plant defense and response to pathogen attack. These results will facilitate the development of new markers for map-based cloning and marker-assisted selection of Pm40 in wheat breeding programs.

Published
2016

43. Effects of Interfaces and Growth Sites on the Extraction Efficiency of Plasmonic Hot Electrons in Photocatalysis.

Author

Mei, Lin, Wang, Shengyan, Ma, Lixia, Zhou, Xiaojie, Yang, Jie, Wei, Baoqiang, and Jiang, Ruibin

Abstract

The efficiencies of plasmonic hot-electron-based materials or devices are determined by the transfer efficiency of hot electrons from plasmonic metals to semiconductors. Since the hot-electron transfer takes place at the interface between plasmonic metals and semiconductors, their interface plays a critical role in the hot-electron efficiency. Herein, Au/CdS and Au/CdSe nanostructures with different morphologies are synthesized to study the morphology and interface effects on the hot-electron efficiency. The end-selectively grown nanostructures, Au/end-CdSe and Au/end-CdSe, show extraction efficiencies of hot electrons higher than those of their corresponding fully coated counterparts. For the nanostructures with the same morphology, the Au/CdSe nanostructures have a much higher hot-electron efficiency than the Au/CdS ones. Theoretical calculations indicate that Au/CdS nanostructures exhibit formidable barriers for hot-electron injection, while Au/CdSe nanostructures show resonant electronic states between two components near the Fermi level and are without barriers for hot-electron injection. These two effects jointly account for the higher hot-electron efficiency of Au/CdSe, regardless of whether a direct or indirect transfer mechanism occurs in Au/CdSe nanostructures. These findings unveil the interfacial and morphology effects on the hot-electron efficiency of plasmonic metal/semiconductor nanostructures and will be helpful in the design of nanostructures with high hot-electron efficiency. [ABSTRACT FROM AUTHOR]

Published
2024
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49. Study on the Fingerprints and Quality Evaluation of Angelica Sinensis Radix by HPLC Coupled With Chemometrics Based on Traditional Decoction Process of ACPTCM

Author

Zhang Qian, Chen Yiyang, Ma Lixia, Jiang Yue, Chen Jun, Dong Jie, Ma Yifan, Zhang Jingjing, and Yan Guojun

Subjects
Therapeutics. Pharmacology, RM1-950
Abstract

Objective: To establish a HPLC fingerprints evaluation method for Angelica Sinensis Radix (ASR) based on traditional decoction process of Ancient Classical Prescriptions of Traditional Chinese Medicine (ACPTCM). Methods: The fingerprints of 10 batches of ASR were further evaluated by chemometrics methods. The similarity analyzed with “Similarity Evaluation System for Chromatographic Fingerprint of Traditional Chinese Medicine 2004A,” and hierarchical clustering analysis (HCA) and principal component analysis (PCA) were performed by SPSS (version 22.0, SPSS Inc., Chicago, IL, USA). Results: There were 12 common peaks, and the similarity degrees of 10 batches of samples were more than 0.923 and showed that all the samples from different origins were of good consistency. The samples were divided into 4 clusters by HCA. The results of PCA showed that the 3 factors were chosen, the quality of samples could be evaluated basically. The comprehensive score results show that the ASR with Lot.Nos.DG-18007, DG-18008 in Weiyuan County, Gansu and DG-18009 produced in Minle County, Gansu Province rank among the top 3 in all samples. Conclusions: These results demonstrated that the combination of HPLC chromatographic fingerprint and chemometrics offers an efficient and reliable approach for quality evaluation of ASR from different sources as Ancient Classical Prescriptions ingredients.

Published
2020
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