Physiological quality of soybean seeds of cultivars submitted to harvesting delay and its association with seedling emergence in the field

With the aim of studying the relationship between the physiological quality of soybean seeds submitted to three harvest times and seedling emergence in the field, seeds of cultivars UFV-16, Splendor, Vencedora, Confiança, UFV-18, UFV-TN 105, Garantia and Celeste were harvested at stages R8, R8+15 an...

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Published inJournal of Seed Science Vol. 35; no. 2; pp. 147 - 152
Main Authors Diniz, Fábio Oliveira, Reis, Múcio Silva, Dias, Luiz Antônio dos Santos, Araújo, Eduardo Fontes, Sediyama, Tuneo, Sediyama, Camilla Atsumi
Format Journal Article
LanguageEnglish
Published 2013
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Summary:With the aim of studying the relationship between the physiological quality of soybean seeds submitted to three harvest times and seedling emergence in the field, seeds of cultivars UFV-16, Splendor, Vencedora, Confiança, UFV-18, UFV-TN 105, Garantia and Celeste were harvested at stages R8, R8+15 and R8+30 days. The following tests were performed: accelerated aging, electrical conductivity, emergence in sand, emergence speed index and seedling emergence in the field. Germination and vigor were reduced in seeds harvested at 30 days after stage R8 in all the tests, except for the accelerated aging test, which showed a decline in vigor seeds harvested with a delay of 15 days. Seeds of cultivars UFV-16, Confiança and Garantia showed lower physiological quality in most tests, while the seeds of cultivar Celeste had higher physiological quality than the others. There was similarity between the test results of seed quality and seedling emergence in the field. Com o objetivo de estudar as relações entre a qualidade fisiológica de sementes de soja submetidas a três épocas de colheita e a emergência das plântulas em campo, sementes das cultivares UFV-16, Splendor, Vencedora, Confiança, UFV-18, UFV-TN 105, Garantia e Celeste foram colhidas nos estádios R8, R8+15 e R8+30 dias. Realizaram-se os testes de germinação, envelhecimento acelerado, condutividade elétrica, emergência em areia, índice de velocidade e emergência de plântulas em campo. A germinação e o vigor foram reduzidos nas sementes colhidas aos 30 dias após o estádio R8, em todas as avaliações, à exceção do teste de envelhecimento acelerado, que revelou queda do vigor nas sementes colhidas com 15 dias de retardamento. Sementes das cultivares UFV-16, Confiança e Garantia foram as que apresentaram, na maioria dos testes, qualidade fisiológica inferior e as da cultivar Celeste, qualidade fisiológica superior às demais. Houve similaridade entre os resultados dos testes de avaliação da qualidade fisiológica de sementes com a emergência das plântulas em campo.
ISSN:2317-1537
2317-1537
DOI:10.1590/S2317-15372013000200002