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生态学 13 植物学 12 水土保持学 9
土壤学 6 系统生态学::系统生态学 6 生物学::植物学::植物生态学 4
地球科学::海洋科学::海洋生物学 3 材料学 3 天文学 2
摄影测量与遥感技术 2 灾害学 2 环境工程 2
环境科学 2 自然地理学 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 主要研究方向::海洋生物学 1 光学 1
光学工程 1 农业经济学 1 农学::土壤学 1
固体力学 1 地图学与地理信息系统 1 地球科学::地球科学其他学科 1
地球科学::海洋科学 1 地理学::地图学与地理信息系统 ::在农业、林业上的应用 1 地理学::自然地理学,环境科学 1
岩土力学 1 应用心理学 1 水土保持与荒漠化防治 1
水文地质学 1 物理海洋学 1 环境工程::固体废弃物资源化 1
环境工程::水处理工程 1 环境科学::环境学 1 环境科学技术::环境工程学 1
环境科学技术::环境科学技术基础学科::环境科学技术基础学科其他学科 1 环境经济与环境管理::环境管理学 1 生物催化与转化::生物代谢工程 1
生物学 1 生物学::动物学 1 生物学::微生物学 1
生物学::植物学::植物生理学 1 生物学::生态学::生态风险评价 1 生物学::生态学::种群生态学 1
生物学::生态学::系统生态学 1 生物科学 1 生物科学::动物学 1
系统生态学::产业生态学 1 系统生态学::城市生态学 1 计算机科学技术基础学科::计算机科学技术基础学科其他学科 1
计算机软件::计算机软件其他学科 1

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