Figures (5)  Tables (2)

    • Figure 1. 

      Representative resources of four tea populations.

    • Figure 2. 

      (a) Cross-validation error results of different K values. (b) Population genetic structure of 98 accessions. The length of each colored segment represents the proportion of the individual genome inferred from ancestral populations (K = 2−8). (c) NJ tree of the 98 tea accessions. (d) PCA plot of the 98 tea accessions.

    • Figure 3. 

      Genetic diversity and divergence of four tea populations. (a) θπ and FST among four tea populations. (b) LD decay of four tea populations.

    • Figure 4. 

      Selected genes were identified in AHYT. (a) Distribution of Log2(θπ AHYT/θπ CBDC) and Z(FST) calculated values. (b) Distribution of Log2(θπ AHYT/θπ JHKC) and Z(FST) calculated values. (c) Distribution of Log2(θπ AHYT/θπ RCBM) and Z(FST) calculated values. The red points are selected genomic regions under 5% value of Z(FST) and Log2(θπ AHYT/θπ control populations). (d) Venn diagram of selected gene numbers.

    • Figure 5. 

      Biochemical composition of four tea landraces. *, p < 0.05; **, p < 0.01; ***, p < 0.001.

    • PopulationsAbbreviationSample
      size      		OriginPlant typeProcessing
      suitability      		Planting region
      Chengbu DongchaCBDC9Chengbu CountyArbor and semi-arborBlack tea, Green teaHunan and Guangxi Provinces
      Jianghua KuchaJHKC8Jianghua CountyArbor and semi-arborBlack teaSouthern Hunan
      Rucheng BaimaochaRCBM11Rucheng CountyShrub and semi-arborBlack tea, White teaGuangdong and Hunan Provinces
      Anhua YuntaiAHYT8Anhua CountyShrubBlack tea, Green teaThroughout China

      Table 1. 

      Sampling information of four Hunan tea landrace populations.

    • SampleAHYTRCBMCBDCJHKC
      Raw bases (bp)46408354867415631827914708037343843453617038
      Clean bases (bp)46253486600414476063184695394455043328803425
      Effective rate (%)99.6699.7299.7399.71
      Q20 (%)96.9697.1697.0796.70
      GC content (%)39.6340.5539.4839.48
      Clean_reads308356577276317375.5313026297291543979.2
      Mapped_reads302704469265177407306306291283301609
      Mapping_rate (%)98.1396.0397.8397.22
      Average_depth14.3312.5614.3613.64
      Coverage_4X76.14%68.31%74.33%72.96%
      Average SNP(bp)1327773137857614360201403998
      Average INDEL(bp)6561677772126766

      Table 2. 

      Summary statistics for whole-genome resequencing.