Plastome data provides new insights into population differentiation and evolution of Ginkgo in the Sichuan Basin of China

BMC Plant Biology, Journal Year: 2025, Volume and Issue: 25(1)

Published: Jan. 14, 2025

Ginkgo biloba L., an iconic living fossil, challenges traditional views of evolutionary stasis. While nuclear genomic studies have revealed population structure across China, the patterns reflected in maternally inherited plastomes remain unclear, particularly Sichuan Basin - a potential glacial refugium that may played crucial role Ginkgo's persistence. Analysis 227 complete plastomes, including 81 newly sampled individuals from Basin, three distinct maternal lineages differing known genome patterns. We identified 170 sequence variants and extensive RNA editing (235 sites) with bias toward hydrophobic amino acid conversions, suggesting active molecular evolution. A previously undocumented haplotype (IIA2), predominant western populations, showed close genetic affinity rare refugial haplotypes. Western populations exhibited higher haplotypic diversity distinctive structure, supporting basin's as both corridor for expansion. Ancient trees (314–784 years) provided evidence interaction between natural processes historical human dispersal shaping current Our findings demonstrate substantial within reveal dynamic evolution through plastome variation patterns, challenging notion stasis this fossil. This study provides resources understanding informs conservation strategies endangered species.

Language: Английский

Complete mitochondrial genome of Medicago sativa ssp. falcata (Papilionoideae, Fabaceae): characterization and phylogenetic analysis

Planta, Journal Year: 2025, Volume and Issue: 261(6)

Published: April 29, 2025

Language: Английский

Comparative Genomic and Phylogenetic Analysis of Chloroplasts in Citrus paradisi Mac.cv. Cocktail

Genes, Journal Year: 2025, Volume and Issue: 16(5), P. 544 - 544

Published: April 30, 2025

Background: Citrus paradisi Mac. cv. Cocktail is globally valued for its abundant nutrients and bioactive compounds, particularly in tropical subtropical regions. A novel albino phenotype mutant of C. (designated WT) was identified Quzhou subsequently named mosaic (MT). To distinguish from conventional grapefruit cultivars to elucidate genomic differences between WT MT, this study conducted a comprehensive comparison their chloroplast genomes with those previously reported species. Methods: The complete MT were assembled through Illumina PE150 sequencing, enabling detailed comparative evolutionary studies. Results: results revealed that both exhibit conserved quadripartite structure. Each genome measures 160,186 base pairs length, uniform GC content 38.5%. Annotation 138 genes (91 protein-coding, 10 rRNA, 37 tRNA), 82 repeats, A/U-biased codons. Genome boundaries showed identical but divergent other Citrus. 52 protein-coding comparable selection pressures MT. Phylogenetically, are closely related distinguished all the traditional grapefruits. Conclusions: unrelated variations. Chloroplast genomics supports Cocktail’s differentiation This expands resources establishes theoretical framework future research on varieties.

Language: Английский