Comparison of tests for the analysis of vigor and viability in soybean seeds and their relationship to field emergence

Márcia Santorum,Diego Dos Santos,Márcia Maria Mauli,Eduardo Godoy De Souza,Walter Boller,Lúcia Helena Pereira Nóbrega

doi:10.4025/actasciagron.v35i1.14955

Abstract

The objective of this study was to compare tests used to identify vigor in soybean seeds and to establish a model that relates the seeds' vigor, as determined in the laboratory, with field emergence. Five soybean cultivars were evaluated based on their germination, sand emergence, immersion in sodium hypochlorite, accelerated aging, controlled deterioration, cold test, seedling growth, electrical conductivity, tetrazolium, emergence percentage, seedling length in the field and seedling dry weight. The experimental design was completely randomized and means were compared by the Tukey test at 5% probability. Assays for accelerated aging, controlled deterioration and tetrazolium showed the closest correlation to field emergence. The regression model included the sand emergence speed, germination speed index and index of sand emergence speed as the variables that best correlated with field emergence.

Highlights

For those involved in the production of crops, stand establishment is the first real opportunity for a practical evaluation of the quality of the seeds produced and the effect of the procedures used at the time of sowing (MARCOS FILHO, 2005).Every seed has genetic, physical, physiological and health quality attributes that guarantee good agronomic performance and are critical to the success of a crop (KRZYZANOWSKI et al, 2008).The germination test is widely used for assessing the quality of seeds, but often shows no correlationActa Scientiarum
The data presented were obtained from original observations, and the percentage results were transformed into arc sin
Means followed by the same letter, lower case in column, do not differ by the Tukey test at 5% probability

Summary

Introduction

For those involved in the production of crops, stand establishment is the first real opportunity for a practical evaluation of the quality of the seeds produced and the effect of the procedures used at the time of sowing (MARCOS FILHO, 2005).Every seed has genetic, physical, physiological and health quality attributes that guarantee good agronomic performance and are critical to the success of a crop (KRZYZANOWSKI et al, 2008).The germination test is widely used for assessing the quality of seeds, but often shows no correlationActa Scientiarum. For those involved in the production of crops, stand establishment is the first real opportunity for a practical evaluation of the quality of the seeds produced and the effect of the procedures used at the time of sowing (MARCOS FILHO, 2005). The germination test is widely used for assessing the quality of seeds, but often shows no correlation. Due to this inadequacy, the concept of vigor was introduced and new tests for evaluating it were devised (SCHUAB et al, 2002). Not all clearly represent the field emergence, making it necessary to evaluate them in a way that would reflect the development of the seeds in the field through laboratory tests

Objectives

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Results

Conclusion