GS Yudou 8 is a narrow-leafed soybean variety derived from the natural hybrid of Zheng 74046 line and a tip soybean parent material (paternal) with a pedigreeselection method.
The early sprouting and mid maturing new mulberry varieties Nongsang 12 and Nongsang 14 were bred through hybridization, single plant selection, pedigreeselection and regional test.
通过人工有性杂交、单株选择、系统选择、区试鉴定，育成早生中熟桑树新品种农桑12号、农桑14号。
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Pedigree method, backcross method and convergent cross selection are used widely in dwarf maize breeding.