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光学工程 14 天文学 10 材料学 5
生态学 5 植物学 4 自然地理学 4
主要研究方向::海洋生态与环境科学 3 光学 3 环境科学 3
天体物理 2 环境科学::环境化学 2 生物学::植物学::植物生理学 2
Conservation genetics of L. decora: The nucleotide sequences from three chloroplast DNA (cpDNA) regions (the rpl16 intron, trnQ-5’rps16 intergenic spacer and rpl32-trnL intergenic spacer) and two nuclear gene (GAPDH and GBSSI) were selected to characterize the genetic structure and phylogeography of this species. Eleven populations were sampled across the distribution range of L. decora in China. Low levels of cpDNA genetic diversity were found in this species and within populations, with the identification of 2 haplotypes in a total of 2745 bp (cpDNA: π = 0.00102, Hd = 0.468, HT = 0.480), while the levels of genetic diversity revealed by the nuclear gene GAPDH and GBSSI (GAPDH: π = 0.00237, Hd = 0.773, HT = 0.807; GBSSI: π = 0.00167, Hd = 0.751, HT = 0.790) were relatively high, indicating that random losses of genetic polymorphisms from populations may have occurred recently. Relatively high genetic differentiation for both markers (cpDNA: GST = 0.899, FST = 0.893; GAPDH: GST = 0.309, FST = 0.432; GBSSI: GST = 0.274, FST = 0.263) were detected at the wide-species level. Two cpDNA haplotypes, twelve GAPDH haplotypes and ten GBSSI haplotypes were recovered, respectively. Almost every population except the population SP was fixed for one cpDNA haplotype, causing no variation within the populations. Several nuclear haplotypes were distributed widely in most populations. These results may be mainly explained by long-term fragmentation and the limited gene flow caused by geographic isolation among populations. The mismatch distribution analyses and neutrality tests provided no evidence for a recent population expansion in L. decora. The time of all GAPDH haplotypes coalesced to the most recent common ancestor was dated to between 0.46 (95% CI 0.14-0.89)-0.65 (95% CI 0.18-1.22)mya, which predates the LGM. In situ shrinking or extinction might have occurred to L. decora during the glacial ages and L. decora populations did not retreat to common refugia or migrated backwards. Based on the genetic diversity and uniqueness of the populations, conservation strategies are discussed for this endangered species.2. 1 主要研究方向 1 农学 1
农学::作物学::作物栽培学与耕作学 1 分子生物学 1 分析化学 1
化学 1 化学::分析化学 1 土壤学 1
地球科学 1 地球科学::海洋科学::海洋地质学 1 地球科学::海洋科学::海洋生物学 1
地球科学::海洋科学::海洋科学其他学科 1 地理学::地图学与地理信息系统 ::在农业、林业上的应用,地理学::地图学与地理信息系统 ::在生态环境科学上的应用 1 地理学::自然地理学::水文地理学及水资源,地理学::自然地理学::气候学 1
水产学::水产学基础学科::水产学基础学科其他学科 1 水产学::水产学基础学科::水产生物学 1 环境科学::环境科学技术其他学科 1
理论物理 1 生物催化与转化::生物代谢工程 1 生物学::分子生物学 1
生物学::植物学::植物生态学,生物学::植物学::植物生理学,农学::林学 1 生物学::生态学::恢复生态 1 生物学::细胞生物学 1
生物科学 1 粒子物理与原子核物理 1 药学 1
计算机科学技术 1 计算机视觉与模式识别 1

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