Xi Wang's research while affiliated with South China Agricultural University and other places

... The distribution of haplotypes in the western region was consistent with previous results. Xiao et al. [21] showed well-mixed phylogenetic relationships among individuals of four varieties of T. ciliata in Yunnan Province (T. ciliata var. ...

... net/ proje cts/ kaksc alcul ator2/) was used to calculate the non-synonymous (Ka) and synonymous (Ks), substitution rates, and Ka/Ks based on the pairwise CDS and amino acid alignment with the yn00 method (Yang and Nielsen 2000). According to the Darwin's evolution theory, it is proposed that Ka/Ks > 1.0 means positive selection, while Ka/Ks < 1.0 indicates purifying selection, and Ka/Ks = 1.0 denotes neutral selection (Li et al. 2023). Tissue-specific expression profiles of target genes were retrieved from the Brassica napus information resource (BnIR) database (https:// yangl ab. ...

... The population genetic theory emphasizes the intraspecific interaction among genotypes, and its approach is widely applied to instructing genetic conservation [3,28]. The basic evolutionary processes that maintain genetic diversity involve selection, genetic drift, migration, and mutation at the population level [29]. ...

... However, the genetic gain from provenance selection could be small, given the extensive pollen flow that effectively reduced population genetic differentiation. Therefore, artificial selection should concentrate on selection from families within provenances, or selection from individuals within families within provenances in breeding [72,73]. ...

... Because leaf and floral traits are often influenced by environmental factors and exhibit continuous variation within and between species [2,3], the delimitation of varieties of T. ciliata based on these traits remains uncertain. There is still debate about the taxonomic status of these varieties [4]. Similar to a previous study Approximately 5 g of fresh leaves per sample were immediately dried and preserved on silica gel. ...

... Here, we reported the phylogenetic relationships and the genetic differentiation among sympatric varieties with both the whole chloroplast genome sequence and markers, and explored the conservation strategy of this endangered species. Analysis with nuclear genomes will be present in a separate study using our recent assembly of nuclear genome sequences of T. ciliata as the reference genome (Wang, Xiao, He, Li, Lv, et al., 2022;Wang, Xiao, He, Li, Song, et al., 2022). One reviewer suggested inclusion of nuclear data analyses, but it is more appropriate to present the nuclear part in a separate study to accompany this work since more extensive analyses are needed with the resequencing data of these varieties. ...

... Toona ciliata, a tree species belonging to the family Meliaceae, is widely distributed in several countries across continents [1]. However, it is a wild plant nationally protected in China due to the threat of extinction resulting from intense deforestation and low natural propagation rates [1][2][3]. This species was introduced in Brazil, and as it has excellent adaptation to the climate, it is exploited for commercial wood production. ...

... Various phytochemicals such as alkaloids, monoterpenoids, triterpenoids, ethylene glycol, saponin, and cadambine are obtained from the bark, leaves, and flowers of this plant (Liu et al. 2010;Huang et al. 2020). N. cadamba is widely used in various ailments such as eye inflammation, stomach pain, ulcers, blood disorders, sour throat, cough, skin diseases, dyspepsia, fever, leprosy, stomatitis, hyperglycemia, hyperlipidemia, and hypertension (Huang et al. 2020;Wang et al. 2021). Despite the importance of this plant, no reports are available on the synthesis of silver nanoparticles from the bark extract of N. cadamba. ...

... This species, however, possesses a strong ability to reproduce asexually, and in nature, it shows both seed propagation and vegetative propagation (Guo et al. 2007). In the process of sexual reproduction of plants, mutations such as deletion, duplication, inversion, translocation, and chromosome doubling can occur in the course of chromosome exchange, which can cause genetic variation (Li et al. 2023) and genetic diversity of species (Zhang et al. 2019). Asexual reproduction has less effect on genetic variation than sexual reproduction. ...

... In addition, 350 regions showed signs of simultaneous selection among populations from different geographical origins ( Figure S6; Table S4). These regions harbored 548 genes ( (Tamaki et al., 2007;Mao et al., 2015;Kang et al., 2019;Shen et al., 2020;Zhang et al., 2020a). The detected single nucleotide polymorphisms (SNPs) within these genes showed large differences in allele frequency between alfalfa varieties from America, Europe, Turkey, and China (Table S6). ...