The discriminant analysis of principal components (DAPC) of different wild ancient tea tree populations.

The obtained graph represents the individuals as dots and the groups as inertia ellipses. Eigenvalues of the analysis are displayed in inset.</p

16 pairs of EST-SSR primers correlation properties.

16 pairs of EST-SSR primers correlation properties.</p

Gel photographs of partial primers amplification products for 86 individual samples of wild ancient tea tree from different altitudes based on EST-SSR marker.

A: CsEMS72, B: CsEMS78, C: CsEMS189, D: CsEMS201. Pop1: 1–26, Pop2: 27–46, Pop3: 47–66, Pop4: 67–86. (TIF)</p

Nei’s genetic identity among populations of wild ancient tea tree at different altitudes.

Nei’s genetic identity among populations of wild ancient tea tree at different altitudes.</p

General situation of land samples at different altitudes.

General situation of land samples at different altitudes.</p

Genetic differentiation of tea populations along the altitude gradient.

Genetic differentiation of tea populations along the altitude gradient.</p

Nei’s genetic distance among populations of wild ancient tea tree at different altitudes.

Nei’s genetic distance among populations of wild ancient tea tree at different altitudes.</p

Genetic diversity parameters of four natural populations of wild ancient tea tree at different altitudes.

Genetic diversity parameters of four natural populations of wild ancient tea tree at different altitudes.</p

Genetic diversity parameters of wild ancient tea tree populations based on EST-SSR markers.

Genetic diversity parameters of wild ancient tea tree populations based on EST-SSR markers.</p

Genetic structure of wild tea tree population at different altitudes in Qianjiazhai Nature Reserve.

Different colors indicate three clusters (optimal K = 3). Light green bar represents the first cluster, yellow bar represents the second cluster, pink bar represents the third cluster.</p