Dissimilaridade genética em população segregante de soja com variabilidade para caracteres morfológicos de semente

Dellagostin, Marisa; Henning, Fernando Augusto; Mertz, Liliane Márcia; Köpp, Maurício Marini; Crestani, Maraisa; Schuster, Ivan; Zimmer, Paulo Dejalma

doi:10.1590/s0101-31222011000400011

Cited by 4 publications

(3 citation statements)

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“…However, in any breeding program, knowledge of the available germplasm in terms of performance, combination capacity, and genetic dissimilarity is of fundamental importance (Vieira et al, 2005). It has recently seen that modern soybean genotypes present a narrow genetic base complicating the development of superior genotypes (Dellagostin et al, 2011;Hamawaki et al, 2012;Yokomizo et al, 2013). Furthermore, it has been shown that the Brazilian soybean germplasm has maintained constant genetic variability in the last 30 years of expansion and breeding of crops with satisfactory results for many traits of interest (Priolli et al, 2004;Miranda et al, 2007;Wysmierski and Vello, 2013).…”

Section: Introductionmentioning

confidence: 99%

Analysis of the genetic divergence of soybean lines through hierarchical and Tocher optimization methods

et al. 2016

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This study aimed to evaluate the clustering pattern consistency of soybean (Glycine max) lines, using seven different clustering methods. Our aim was to evaluate the best method for the identification of promising genotypes to obtain segregating populations. We used 51 generations F5 and F6 soybean lines originating from different hybridizations and backcrosses obtained from the soybean breeding program of Universidade Federal de Uberlândia in addition to three controls (Emgopa 302, BRSGO Luziânia, and MG/BR46 Conquista). We evaluated the following agronomic traits: number of days to flowering, number of days to maturity, height of the plant at maturity, insertion height of the first pod, grain yield, and weight of 100 seeds. The data was submitted to analyses of variance followed by average Euclidean distance matrix estimation used as measure of dissimilarity. Subsequently, clusters were formed using the Tocher method and dendrograms were constructed using the hierarchical methods simple connection (nearest neighbor), complete connection (most distant neighbor), Ward, median, average within cluster connection. The nearest neighbor method presented the largest number of genotypes in group I and showed the greatest similarity with the Tocher optimization method. The joint use of these two methodologies allows for differentiation of the most genetically distant genotypes that may constitute the optimal parents in a breeding program.

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Section: Introductionmentioning

confidence: 99%

Analysis of the genetic divergence of soybean lines through hierarchical and Tocher optimization methods

et al. 2016

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“…Alguns trabalhos foram realizados visando selecionar caracteres para a melhoria da qualidade de sementes de soja, buscando: resistência a dano mecânico, alto desempenho germinativo em ambientes tropicais de alta temperatura e umidade relativa, resistência a doenças, tamanho da semente, permeabilidade da parede da vagem e propriedades do tegumento (CARBONELL; KRZYZANOWSKI, 1995;DELLAGOSTIN et al, 2011;GASPAR-OLIVEIRA, 2014;KRZYZANOWSKI, 1998;KRZYZANOWSKI et al, 2008).…”

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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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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“…Seed coat color can be infl uenced by the expression of the genes associated with the distribution of pigments and chemical compounds found in the epidermal layer (Dellagostin et al, 2011;Yu, 2013;Hong et al, 2017), day length and dry or wet seasons (Chan et al, 2017), as well as specifi c acids and proteins. Regardless of the factors involved, it is known that the seed coat color heteromorphism is correlated with water absorption, germination, mortality and maturation in other species (Nakagawa et al, 2007, Boyle andHladun, 2005;Atis et al, 2011;Gu et al, 2011;Alves et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

PERMEABILITY TO WATER AND VIABILITY IN HETEROMORPHIC COLOR SEEDS OF Bowdichia Virgilioides KUNTH

et al. 2021

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Species that produce seeds with a rigid integument represent a serious problem because their impermeable coat restricts the entry of water, which makes germination difficult. The heteromorphism of the integument in Bowdichia virgilioides causes water imbibition to vary substantially and, therefore, the objective of this work was to study the relation of seed coat color with permeability and viability in Bowdichia virgilioides. Seeds were separated into five different colors (yellowish-orange, orange, orange/reddish, reddish, and rusty red) and the following parameters were analyzed: water absorption, germination, mortality, viability, synchrony, and maximum potential of germination. The color was a determining factor for most of the evaluated parameters. The seeds with yellowish or orange/reddish coats tend to be little permeable to water while seeds with reddish or rusty red coats are highly permeable. The results indicated that seeds with reddish color had greater physiological potential indicating a probable relationship with the maturation point of the species. However, in the seeds of the species studied, irrespective of coloring, germination was late with low synchrony and low daily seed germination count, typical characteristics of dormancy.

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Dissimilaridade genética em população segregante de soja com variabilidade para caracteres morfológicos de semente

Cited by 4 publications

References 12 publications

Analysis of the genetic divergence of soybean lines through hierarchical and Tocher optimization methods

Analysis of the genetic divergence of soybean lines through hierarchical and Tocher optimization methods

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

PERMEABILITY TO WATER AND VIABILITY IN HETEROMORPHIC COLOR SEEDS OF Bowdichia Virgilioides KUNTH

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