Testes para a seleção de populações de cenoura visando ao vigor e à longevidade das sementes

Martins, Cibele Chalita; Silva, Norberto da; Machado, Carla Gomes

doi:10.1590/s0103-84782014005000001

Cited by 13 publications

(27 citation statements)

References 7 publications

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“…Para isso são selecionadas linhagens mais produtivas, resistentes a pragas, doenças, adaptadas a diferentes condições de clima, solo, fotoperíodo e que permitam a incorporação de novas áreas, possibilitando maior rentabilidade para o produtor (BUENO; MENDES; CARVALHO, 2006;KRZYZANOWSKI, 1998;VASCONCELOS et al, 2012). No entanto, pouca ênfase tem sido dada à seleção de caracteres associados à qualidade e desempenho de sementes e isto pode ser comprovado pela elevada variabilidade genética disponível e ganho por seleção obtidos neste tipo de estudo (MAIA et al, 2011;MACHADO, 2014;OLIVEIRA et al, 2014;VASCONCELOS et al, 2012).…”

Section: Introductionunclassified

“…Estudos realizados com soja avaliando a germinação e emergência de plântulas em leito de areia (VASCONCELOS et al, 2012); feijão verificando a germinação, o índice de velocidade de germinação e a massa de matéria seca de sementes (MAIA et al, 2011); cenoura e nabo forrageiro, avaliando a germinação, o teste da primeira contagem, a classificação do vigor de plântulas e o envelhecimento acelerado (MARTINS; SILVA; MACHADO, 2014;OLIVEIRA et al, 2014), indicaram que estas são características com elevadas herdabilidade e variabilidade e, portanto, a aplicação de métodos de melhoramento simples poderia ser utilizado no tocante à melhoria da qualidade das sementes, seleção de progênies com sementes mais longevas e maior emergência de plântulas em campo. Sendo assim, a seleção visando à melhoria da qualidade fisiológica de sementes de soja também pode ser uma característica de grande importância para os programas de melhoramento genético (CARBONELL; KRZYZANOWSKI, 1995;VASCONCELOS et al, 2012).…”

Section: Introductionunclassified

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Methodology for the selection of soybean strains for germination, vigour and field emergence

Martins

Unêda-Trevisoli

Môro

et al. 2016

Revista Ciência Agronômica

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RESUMO -Cultivares de soja com sementes de maior qualidade fisiológica são de interesse para agricultores e empresas de sementes. Assim, objetivou-se com esse estudo verificar a variabilidade genética e as relações existentes entre caracteres das sementes visando identificar testes passíveis de utilização em laboratório para a seleção de linhagens de soja com sementes de maior germinação, vigor e desempenho em campo. Sementes de 62 linhagens avançadas de soja foram caracterizadas quanto ao teste da primeira contagem e germinação, classificação do vigor de plântulas, condutividade elétrica, teste de envelhecimento acelerado, massa de matéria seca de plântulas e emergência de plântulas em campo. O teor de água das sementes foi determinado antes dos testes de avaliação da qualidade e após o envelhecimento acelerado. Os dados experimentais foram submetidos à análise de variância e covariância estimando-se as correlações fenotípicas, genotípicas e ambientais; herdabilidade; coeficiente de variação genética e ganho por seleção. A variabilidade genética dos caracteres avaliados indica que o melhoramento genético pode contribuir significativamente para a melhoria da qualidade fisiológica das sementes de soja. Os testes de envelhecimento acelerado, primeira contagem, germinação e massa de matéria seca de plântulas podem ser utilizados para a seleção de linhagens de soja com sementes de maior vigor e emergência de plântulas em campo. O ganho genético estimado para a germinação e emergência de plântulas em campo é de 20% por ciclo de seleção. ABSTRACT -Soybean cultivars with seeds of higher physiological quality are of interest to farmers and seed companies. The aim of this study therefore, was to verify the genetic variability and the relationship that exists between various seed characteristics in order to identify tests that may be used in the laboratory when selecting soybean strains having seeds of greater germination, vigour and field performance. The seeds from 62 advanced strains of soybean were characterised as to first count and germination, classification of seedling vigour, electrical conductivity, accelerated ageing, seedling dry weight and seedling field emergence. Seed moisture content was determined before the tests for quality evaluation, and after the test for accelerated ageing. The experimental data were subjected to analysis of variance and covariance, estimating the phenotypic, genotypic and environmental correlations; heritability; coefficient of genetic variation; and gain from selection. The genetic variability of the characteristics under evaluation indicates that breeding can significantly contribute to an improvement in the physiological quality of soybean seeds. The tests of accelerated ageing, first count, germination and seedling dry weight can be used in selecting soybean strains with seeds of greater vigour and seedling field emergence. The estimated genetic gain for germination and seedling field emergence is 20% per selection cycle. Palavras

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Section: Introductionunclassified

Methodology for the selection of soybean strains for germination, vigour and field emergence

Martins

Unêda-Trevisoli

Môro

et al. 2016

Revista Ciência Agronômica

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“…These characteristics are dependent on genotype, line, and progeny with differences among them as to physiological potential and storage potential (MAIA et al, 2011;VASCONCELOS et al, 2012;MARTINS;MACHADO, 2014;OLIVEIRA et al, 2014;MAMBRIN et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Studies evaluating seed germination and vigor (first count of germination, accelerated aging, seedling emergence in the field, and storage potential) indicated that simple breeding programs combined with methods of selection based on the index theory could be used for the improvement of seed quality (MAIA et al, 2011;VASCONCELOS et al, 2012;MARTINS;MACHADO, 2014;OLIVEIRA et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…The research works concerned with the genetic improvement of plants with a view to seed physiological quality in bean (MAIA et al, 2011;MAMBRIN et al, 2015), soybean (VASCONCELOS et al, 2012;MARTINS et al, 2016), carrot (MARTINS; SILVA; MACHADO, 2014), and forage turnip (OLIVEIRA et al, 2014) resulted in high heritability values (larger than 70%) and genetic variability reflecting a favorable situation for the selection for seed physiological potential among plant populations.…”

Section: Introductionmentioning

confidence: 99%

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Tests for the Selection of Forage Turnip Progeny to Order the Vigor and Longevity of Seeds

et al. 2017

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-Forage turnip (Raphanus sativus L. var. oleiferus Metzg.) progeny with seeds of higher physiological quality are of importance for farmers and seed producing companies. The objective of this work was to identify tests to be used in laboratories for the selection of turnip progeny having seeds of higher germination, vigor, seedling emergence in the field, and storage potential. Seeds of 100 turnip progeny of paternal half-sibs were evaluated as to water content, 1,000-seed mass, first count of the standard germination test, accelerated aging, and seedling emergence in the field. The seeds were subjected to storage for 12 months in unifoliate paper bags kept under room conditions and then evaluated by means of the standard germination test, first count of the standard germination test, and water content. The data were examined as to variance and genetic and phenotypic correlations, heritability, coefficients of genetic variation, and selection gain. The standard germination test, first count of germination, and the accelerated aging test can be used to select forage turnip progeny for seed physiological quality and storage potential. None of the tests used were efficient at selecting progeny with high field emergence.

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Genetic, environmental effects and storage period in onion seeds quality

Maciel¹,

Carvalho²,

Fernandes³

et al. 2015

Biosci. J.

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ABSTRACT:In several species, seed longevity may be influenced by genotype and storage environment. It is scarce researches that evaluated those effects in onion seeds. From the exposed, it was aimed to evaluate the behavior from onion seeds of different genotypes stored in three conditions of relative humidity (25; 35 and 45% RH) monitored during six different storage periods. The research was executed at the Laboratório de Análise de Sementes e Recursos Genéticos from Universidade Federal de Uberlândia, Monte Carmelo Campus -MG. After harvested, the seeds of two cultivars were storaged in three conditions (SC): 25, 35 e 45% of relative humidity (RH). It was kept the same temperature (17ºC) in all storage conditions. After one year of storage, it was collected monthly seed samples of each genotype inside each storage condition for evaluation of physiological potential with vigor and germination tests. There was significant effect in germination and vigor of the seeds in the storage period and condition and in genotype versus environment, in all analysed variables. The quality of onion seeds may be influenced by genotype, storage conditions and storage period. The best condition to storage onion seeds is at 35% of RH. Seed deterioration was increased with storage period, although, short storage periods have increased germination rates.

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Testes para a seleção de populações de cenoura visando ao vigor e à longevidade das sementes

Abstract: Testes para a seleção de populações de cenoura visando ao vigor e à longevidade das sementes.Ciência Rural, v.44, n.5, mai, 2014. 768Testes para a seleção de populações de cenoura visando ao vigor e à longevidade das sementes

Cited by 13 publications

References 7 publications

Methodology for the selection of soybean strains for germination, vigour and field emergence

Methodology for the selection of soybean strains for germination, vigour and field emergence

Tests for the Selection of Forage Turnip Progeny to Order the Vigor and Longevity of Seeds

Genetic, environmental effects and storage period in onion seeds quality

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