Agrogenomics Research Center

Soybean Applied Genomics Research Unit


Identification of important soybean genes and development of new strategies for effective breeding

 Soybean is one of the most important grain crops as a staple source of nutritious vegetable protein and oil for humans and livestock. Additionally, it provides industrial materials and biofuel. In Japan, soybean is an important source of traditional foods such as tofu, natto, miso and soy sauce. We have developed new strategies for effective soybean breeding through 1) analysis of the genome structure of Japanese (domestic) soybean, 2) development of DNA markers serving as landmarks of agronomically important traits, 3) development of research resources for the identifi cation of important genes in soybean, and 4) isolation of genes controlling traits of importance such as disease and pest resistance, productivity, and regional adaptability through maturity control.

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The soybean genome detabase, DAIZUbase is a comprehensive and integrated database for a Japanese soybean cultivar Enrei. It includes “Unified map”, which indicates the relationship between the linkage map and the physical map, and “Gbrowse”, which exhibits aligned Enrei BAC clones on the genome assembly of a US soybean cultivar Williams 82, and facilitates comparative genome analysis.

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Soybean lines with different flowering time. Flowering time is one of the most important characters relating to the seed productivity of soybean through the adaptation to different cultivation areas and growing seasons. In addition, the growth habit such as plant shape is largely affected by the genes controlling flowering time.