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光学工程 7 植物学 6 材料学 3
农作物 2 地球科学::海洋科学::海洋生物学 2 核技术及应用 2
环境材料与生态化学 2 红外探测材料与器件 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
X321.201.3 1 不对称催化 1 人文地理学 1
光学 1 光电子学 1 光电材料与器件 1
农业基础科学 1 功能防护薄膜 1 半导体器件 1
半导体材料 1 地球科学::海洋科学 1 多相催化 1
天文学 1 废弃物资源化处理 1 微电子学 1
昆虫学 1 材料科学与物理化学 1 林业 1
流体力学 1 海洋生物工程 1 物理化学与绿色催化 1
环境科学::环境化学 1 环境经济与环境管理::环境管理学 1 生态学 1
生态经济学 1 生物化工 1 生物学 1
生物科学 1 生物科学::植物学 1 社会学;经济学 1
粒子物理与原子核物理 1 红外基础研究 1 红外系统与元部件 1
计算机系统结构::计算机系统结构其他学科 1

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