Abstract:

In this paper,comparing and analyzing with fatty acid contents of 156 walnut ecotypes of 13 production areas in Sichuan Province and analyzing the canonical correlations of ecology factor with fat characters and fatty acid compositions were conducted.The results showed that total of palmitic,stearic,oleic,linoleic and linolenic content of walnut was 99% of fat,unsaturated fatty acids was 91% of fat,total of linoleic and linolenic was 60% of fat.Altitude,average temperature in January,longitude,accumulative temperature over 10 ℃ degree were the main factors for accumulation of saturated fatty acid(SFA),monounsaturated fatty acid(MUFA)and polyunsaturated fatty acid(PUFA).The level of SFA increased with average temperature in January and longitude.The level of MUFA and PUFA increased with altitude and accumulative temperature over 10 ℃ degree.Average annual relative humidity and annual average temperature mainly affected accumulation of linolenic.The level of linolenic increased with average annual relative humidity and annual average temperature.Annual average temperature and average temperature in January mainly affected accumulation of oleic and linoleic.The level of oleic and linoleic increased during annual average temperature and average temperature in January decreasing.

Key words: walnut, fatty acid compositions, oleic, linoleic, linolenic, production areas