DISTRIBUTION OF THE MAIN CROP GERMPLASM RESOURCES IN CHINA

This paper describes the characteristics and rules of geographical distribution of main crop germplasm resources, totally 194 634 accessions of germplasm of 73 crops. Among them, food crop germplasm have 161 574 accessions, making up 83% of the total number. The maps of geographical distribution of main food crops, fibre plants and oil crops are presented. The crop germplasm in China are distributed widely in the whole country. With regard to provinces, crop germplasm resources are more bountiful in Shanxi, Guangxi, Sichuan, Shandong, Yunnan, Shaanxi, Hebei, Henan, Guangdong and the total germplasm resources in these provinces are 112 185 accessions, making up 57.6% in the whole country. With regard to agricultural regions, crop germplasm resources at the middle and lower reaches of the Huanghe (Yellow) River are the most bountiful, which have 52 325 accessions, making up 26.9% in the whole country. The number of crop germplasm per million mu (1 ha=15mu) of cultivated land is obviously different in different regions. The more bountiful the heat resources, the more complicated the terrain and the longer the history of agricultural planting, the richer the crop germplasm resources per million mu cultivated land will be.[PUBLICATION ABSTRACT]