Vietnam: Application of molecular markers in breeding soybean varieties resistant to rust disease

Published Nov 21, 2024

Tridge summary

The Institute of Food Crops and Food Plants in Vietnam has developed soybean varieties, D9 and D10, resistant to rust, but due to the fungus's adaptability, a single resistance gene is not sufficient. The institute is now selecting soybean varieties with multiple resistance genes using molecular markers and DNA analysis. A promising variety, D11, has been identified, which has a higher resistance phenotype and longer growth period. This research is crucial as Vietnam's soybean production has declined, meeting only a small part of the demand, and the average yield is lower than global standards. The institute is not only focusing on variety development but also emphasizing the importance of technical staff for improved soybean production.

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Original content

Since 2013, the Institute of Food Crops and Food Plants (Vietnam Academy of Agricultural Sciences) has researched and successfully created soybean varieties resistant to rust, namely D9 and D10. However, the fungus Phakopsora pachyrhiri (the cause of the disease) is highly adaptable and continuously changes during the disease process. None of the previously published single-resistant genotypes are resistant to all strains of the fungus. Dr. Duong Xuan Tu, Deputy Director of the Institute of Food Crops and Food Plants, assessed that the disease resistance of single-resistant genotypes is unstable and can easily be lost or weakened after about 7-8 years of cultivation. "Only varieties with integrated multiple resistance genes have the ability to sustainably resist the disease in nature," he said. Soybean is a short-term crop with economic value. Therefore, the Institute continues to apply DNA molecular markers in the selection and creation of soybean varieties resistant to rust. ...

Source: Agriculture