Interspecific Transition Among Caragana microphylla, C. davazamcii and C. korshinskii Along Geographic Gradient. Ⅰ. Ecological and RAPD Evidence The comparation of drought resistance between Caragana species (Caragana arborescens, C. korshinskii, C. microphylla) and two chickpea (Cicer arietinum L.) cultivars The hydraulic architecture of three Caragana species and its relationship with environmental factors in different habitats of the Inner Mongolia Plateau Genetic diversity and genetic relationship of Caragana microphylla, Caragana davazamcii and Caragana korshinskii in Inner Mongolia Plateau