Establishment of comprehensive evaluation index system of Xanthoceras sorbifolia types

Objective To construct a comprehensive evaluation index system of Xanthoceras sorbifolia germplasm, and provide the basis for type evaluation and classified management.

Method Based on biological characteristics and type classification of X.sorbifolia, a comprehensive evaluation index system was established by analytic hierarchy process.

Result The comprehensive evaluation index system was composed of three layers including a target layer, a control layer and an index layer.The target layer included growth, seed and fruit, seed production, oil production and phenophase characteristics.The index layer was composed of 19 indices.The weighted values of each index and evaluation method were determined by analytic hierarchy process, Delphi and index comprehensive evaluation methods.X.sorbifolia types in Chifeng, Nei monggol were evaluated using the comprehensive evaluation index system.Among different flower types, the scores of simple white flower (3.96) and simple red flower (2.75) were the highest.Among different fruit types, the score of big spherical fruit was the highest (3.98), followed with cylindrical fruit (3.67), and triquetrous fruit (3.50), and these three fruit types were considered as superior types with high production and high oil contents.

Conclusion The established evaluation index system can enable the selection of X.sorbifolia types for the purpose of oil production.