利用外来种质是拓宽我国玉米种质遗传基础，解决遗传狭窄的重要途径。
Utilizing foreign germplasm was an important way which to broad genetic basis and resolves the narrow heredity for Chinese maize germplasm.
导入热带种质是拓宽我国玉米种质遗传基础，改变现有亲本自交系遗传基础狭窄的途径之一。
Introduction of tropical germplasm is one of the ways for extending the genetic basis of maize germplasm and parental inbred lines.
来自我国西南以及日本两地区的小豆种质遗传离散度较大，遗传分化系数、相似系数平均值较低。
The material from Southwest China and Japan has relatively high genetic dispersion, low Gst and average value of genetic similarity coefficient.
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