Biodiversity Science ›› 2017, Vol. 25 ›› Issue (11): 1213-1222.doi: 10.17520/biods.2016376

• Original Papers: Plant Diversity • Previous Article     Next Article

Spatial distribution characteristics of crop germplasm resources using spatial statistics

Yanqing Chen1, Yongsheng Cao1, Yanpeng Wu2, Lina Chen3, Wei Fang1, *()   

  1. 1 Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081
    2 Beijing Academy of Agriculture and Forestry Sciences, Beijng 100097
    3 Department of Computer and Information Technology, Shangqiu Normal College, Shangqiu, Henan 476000
  • Received:2017-08-03 Accepted:2017-10-09 Online:2017-11-20
  • Fang Wei

It is important to understand and analyze the spatial distribution features and models of crop germplasm resources for the comprehensive collection, effective protection, and efficient utilization of these resources. This paper analyzed these characteristics based on spatial statistical principles and methods with ArcGIS software. Firstly, we did a cold and hot spot analysis of germplasm resources at the national scale to determine discrete regions of Chinese germplasm resources from a qualitative aspect. Then, we analyzed the number and center of gravity characteristics of germplasm resources to determine density and homogeneity of germplasm resources in main crop regions. Finally, we analyzed the bearing distribution characteristics of germplasm resources in different planting partitions to determine the scope of resource distribution, angle, and direction. According to results of cold and hot spot analysis, the northern China plain and a part of the loess plateau region belong to accumulation areas of germplasm resources. The central region of Gansu province, the western part of Sichuan and Xinjiang, and the eastern part of Qinghai belong to a discrete area of germplasm resources. In addition to the blank area of germplasm resources, the rest is part of the random distribution area of germplasm resources. According to quality and gravity center analysis results, the Northwest Oasis region mainly grows wheat, cotton, beets, and grapes, the Qinghai-Tibet Plateau region mainly grows barley, wheat and rape, the Northern plateau region mainly grows small grains and beets, and the Northeast region mainly grows soybeans, spring wheat and beets. These are all located in the northeast and the west of China, and their germplasm resources’ densities are low and uniformities are uneven, which means a small amount of the germplasm resources in the four areas are relatively concentrated in a small area. Not only are the densities of germplasm resources of the 6 regions in southeastern of China large, but also the uniformities are relatively homogeneous. The differences in density and uniformity of germplasm resources between eastern and western China are obvious. According to results of the orientation analysis, the distribution range of germplasm resources in the Northwest Oasis is wheat, cotton, beets, and grapes, while the directional trend of germplasm resources in the South are double crops of rice, tropical crops, and sugarcane. Germplasm resources are distributed as follows in these three regions: in the Northern plateau small grains, beets, Northeast soybean, spring wheat and beets; in the Qinghai-Tibet Plateau highland barley, wheat, and rape, mostly distributed in southern areas; and in the Northwest Oasis wheat, cotton, beets, and grapes found in the north of the region. The distribution of germplasm resources of these 6 southeastern regions has no obvious bias.

Key words: crop germplasm resources, spatial statistics, cold and hot spot analysis, orientation analysis, cropping regionalization in China

Fig. 1

Distribution of crop germplasm resources in different cropping regionalization in China"

Fig. 2

Diagram of three elements of standard deviation ellipse"

Fig. 3

The distribution map of cold and hot spots of crop germplasm resources in China"

Fig. 4

Density distribution of crop germplasm resources and geographical center of gravity in different cropping regionalization in China"

Fig. 5

Standard deviation ellipses of crop germplasm resources in different cropping regionalization in China"

Table 2

Axis, oblateness and direction angle of germplasm resources in different cropping regionalization in China"

Agricultural districts
Standard deviation distance of short axis (m)
Standard deviation distance of long axis (m)
Orientation angles (°)
Southern part of China region mainly grows double cropping of rice, tropical crops and sugarcane
221,221 813,953 0.728 85.78
Northwest Oasis region mainly grows wheat, cotton, beets, and grapes
359,814 1,179,873 0.695 109.1
Qinghai-Tibet Plateau region mainly grows barley, wheat and rape
199,418 590,554 0.662 85.76
Northern plateau region mainly grows small grains and beets
225,016 621,073 0.638 53.05
Southern hill region mainly grows double cropping of rice, tea and citrus
230,811 573,503 0.598 64.42
Chuanshan basin region mainly grows rice, corn, sweet potato and citrus mulberry
172,228 367,451 0.531 74.92
Yangtze River region mainly grows rice, cotton, oil, mulberry and tea
193,111 403,958 0.522 73.26
Northeast region mainly grows soybeans, spring wheat and beets
209,459 436,072 0.520 16.84
Yunnan-Guizhou Plateau region mainly grows rice, corn and tobacco
208,596 399,255 0.478 79.54
Huang-Huai-Hai region mainly grows cotton, wheat, rape, tobacco and fruit
293,828 427,092 0.312 47.79
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