Abstract
Quickly and precise evaluations of the vigor of seeds are highly desirable for the success of quality control programs applied to the seed industry. The objective of this experiment was to determine the number of days necessary to calculate the vigor index of common bean seeds using an automated system of seedling images (SVIS ® ), and compare its results with the traditional tests of seed vigor. Samples of five seed lots of the IAC Carioca cultivar were submitted to germination, accelerated aging, seedling emergence in sand and electrical conductivity tests. The parameters measured by the Seed Vigor Imaging System (SVIS ® ) were mean seedling length, growth (ratio of the actual seedling growth to the maximum possible growth), uniformity of growth and the vigor indexes 30:70, 40:60, 50:50, 60:40 and 70:30 (based on different growth/uniformity ratios), and computed from scanned images of three- and four-day-old seedlings. Results of SVIS ® analyses were consistent with the physiological potential evaluations provided by the traditional tests of seed vigor. Therefore, the SVIS ® is efficient for detecting differences in vigor among seed lots of common bean (IAC Carioca cultivar) using three- or four-day-old seedlings, independently of the growth/uniformity ratios used to calculate the vigor index.
Highlights
Vigor tests are essential for evaluating the physiological potential of seed lots and are a basic parameter for developing programs to control the seed quality (MARCOS FILHO, 1999)
Complementary research is, important to verify whether these ratios show variable results depending on the sample and seed species. These studies should always include comparisons with the results of the routine tests for seed vigor. The objective of this experiment was to determine the number of days necessary to calculate the vigor index of common bean seeds using an automated system of seedling images (SVIS®) and compare its results with other tests routinely used to evaluate the physiological potential of common bean seeds
The analyses of variance showed differences in physiological quality between the common bean seed lots; lots 4 and 5 germinated better than lots 1 and 3 and all of them showed a minimum value of 80%, which is mandatory for commercialization in Brazil (Table 1)
Summary
Vigor tests are essential for evaluating the physiological potential of seed lots and are a basic parameter for developing programs to control the seed quality (MARCOS FILHO, 1999). Later efforts by the SVIS® inventors were focused on evaluating the seedling images of soybean (HOFFMASTER et al, 2003, 2005), corn (HOFFMASTER et al, 2005) and melon (MARCOS FILHO et al, 2006) Further research with this software has been focused on the evaluation of physiological potential of seeds and comparing results with those from the traditional tests. For the adaptation and use of the SVIS® for studies on other species, seedling age needs to be determined to obtain a higher consistency and equivalence with the results of the other routine tests Included in this procedure are melon (MARCOS FILHO et al, 2006) and cucumber (CHIQUITO et al, 2012). Complementary research is, important to verify whether these ratios show variable results depending on the sample and seed species These studies should always include comparisons with the results of the routine tests for seed vigor. The objective of this experiment was to determine the number of days necessary to calculate the vigor index of common bean seeds using an automated system of seedling images (SVIS®) and compare its results with other tests routinely used to evaluate the physiological potential of common bean seeds
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