Accelerated aging tests and automated computer imaging system to assess the performance of soybean seeds during storage

Author(s)

Juliana Tieme Yagushi

• Document type: Master's Dissertation
• Press: Piracicaba.
• Institution: Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz (ESALA/BC)
• Defense date: 2012-01-25

Examining board members

Julio Marcos Filho; Alessandro de Lucca e Braccini; Francisco Guilhien Gomes Júnior

• Advisor: Julio Marcos Filho

Abstract

The evaluation of soybean seed vigor has been helping the seed industry in important decisions such as choice of lots to be stored and to defining the appropriate conditions for storability.The objective of this study was to verify the accuracy of accelerated aging tests (traditional and with saturated NaCl) and automated system for seedling evaluation (SVIS®) to assess the physiological potential and estimate the storability of soybean seeds in comparison to the information from accept vigor tests for this species. Two cultivars BRS 184 and M-Soy 7908 RR, each represented by six lots were used. Seeds were stored for six months under two environments: controlled (20ºC and 75% relative air humidity) and normal conditions. Seed performance was evaluated in two month intervals by germination, accelerated aging, electrical conductivity, tetrazolium, SVIS® and sand seedling emergence. Results indicated that accelerated aging (traditional and with saturated NaCl) and automated computer imaging of seedlings (SVIS®) are effective for evaluating the physiological potential of soybean seeds. The storability of soybeans seeds can be consistently evaluated by associating germination and vigor test results, including accelerated aging (traditional and with saturated NaCl) and SVIS®. (AU)

• FAPESP's process: 10/03077-6 - Accelerated aging and seed vigor imaging system to evaluate soybean seed performance during storage.
• Grantee: Juliana Tieme Yagushi
• Support Opportunities: Scholarships in Brazil - Master