Aspectos genéticos do tempo para o florescimento em variantes naturais de soja

Bonato, E. R.; Vello, Natal Antônio

doi:10.1590/s0100-204x1999000600009

Cited by 10 publications

(9 citation statements)

References 7 publications

(6 reference statements)

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“…Isto possibilita a escolha de métodos e caracteres utilizados nas etapas iniciais e avançadas de programas de melhoramento, permitindo ainda, estudar mecanismos, valores genéticos e variabilidade para um caráter (CILAS et al, 1998;BONATO;VELLO, 1999;COIMBRA;GUIDOLIN;CARVALHO, 1999;GRAVINA et al, 2004). No entanto, características como germinação de sementes e emergência de plântulas de soja, são pouco estudadas, quantitativamente.…”

Section: Introductionunclassified

Estimativas de parâmetros genéticos da qualidade fisiológica de sementes de genótipos de soja produzidas em diferentes regiões de Minas Gerais

et al. 2012

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ResumoO estudo quantitativo de diferentes características agronômicas é importante em programas de melhoramento de plantas. Todavia, a estimativa de parâmetros genéticos relacionados à qualidade fisiológica de sementes tem sido pouco explorada, com escassez de informações na literatura. O objetivo deste trabalho foi estimar parâmetros genéticos da qualidade fisiológica de sementes de três cultivares e quatorze linhagens de soja, com ciclo de maturação tardio, que participaram de cinco ensaios finais de avaliação de linhagens, do Programa de Melhoramento Genético de Soja do Departamento de Fitotecnia da UFV. Os ensaios foram conduzidos em Tupaciguara, Florestal, Unaí e dois locais em Capinópolis, no estado de Minas Gerais, no ano agrícola 2000/2001. O delineamento experimental utilizado foi em blocos ao acaso com três repetições. A qualidade fisiológica das sementes foi avaliada pelo teste de germinação e de emergência de plântulas em leito de areia. Os parâmetros genéticos estimados foram componente quadrático genotípico, componente de variância genótipos x ambientes, coeficiente de determinação genotípico, coeficiente de variação genético. A germinação das sementes das cultivares FT 104, Doko-RC e Conquista e das linhagens UFV97-61190916 e UFV98-CR67 foi maior que 85% em todos os ambientes. Os coeficientes de determinação genotípico, obtidos a partir dos dados de germinação de sementes e de emergência de plântulas, variaram entre ambientes. A seleção individual de genótipos de soja, com base na qualidade fisiológica das sementes por local, pode propiciar maiores ganhos quando comparado à seleção em que se consideram todos os ambientes conjuntamente. Palavras-chave: Glycine max, coeficiente de determinação genotípico, coeficiente de variação genético, genética da soja AbstractThe quantitative study of different agronomic characteristics is of great importance in plant breeding programs. However the estimation of genetic parameters related to seed physiologic quality has been little explored and works of that are scarec in the literature. The objective in this work was to estimate genetic parameters for seed physiologic quality of three soybean cultivars and fourteen lineages, with late maturation cycle, that are part of five final experiments of lineages evaluation from the Program of Genetic Improvement of Soybean of the Department of Fitotecnia of UFV, led in Tupaciguara, Florestal, Unaí and two places in Capinopolis, state of Minas Gerais, in the agricultural year 2000/2001. The

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Section: Introductionunclassified

Estimativas de parâmetros genéticos da qualidade fisiológica de sementes de genótipos de soja produzidas em diferentes regiões de Minas Gerais

et al. 2012

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“…In this study, the number of days for flowering had significant effects on both GCA and SCA. Bonato and Vello (1999) concluded that the main component determining the time for flowering is additive. For the number of days to maturity, the effects of GCA and SCA were significant and corroborated the results obtained by Oliveira et al (2014).…”

Section: Resultsmentioning

confidence: 99%

Combinatorial analysis of agronomic characters in soybean

et al. 2019

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Evaluation of the genetic potential of parent plants is fundamental for obtaining superior populations with desirable agronomic characters. The aim of this work was to obtain estimates of the general and specific combining abilities of five soybean parents to identify the most promising parents and hybrid combinations for the development of superior genotypes for grain yield. In this study, two groups of soybean cultivars were selected: group I resistance (UFUS 7910 and BR/MG 46 Conquista) and group II (TMG 4182, TMG 4185 and BRSGO Chapadões). The parents were crossedin a 2 x 3 partial diallel scheme, and the experiment was analyzed according to Griffing’s (1956) parent and F1 model and adapted by Geraldi and Miranda Filho (1988). Six hybrid combinations and respective parents were arranged in randomized complete blocks with four repetitions. The following characters were evaluated: number of days for flowering and maturity, height of the plant in flowering and at maturity, number of nodes in flowering and at maturity, number of total pods and grain yield per plant. The BR/MG 46 Conquista, UFUS 7910 and BRSGO Chapadões parents contributed to obtaining productive segregant populations due to additivity for the total number of pods and grain yield per plant. The hybrid combinations BRSGO Chapadões x BR/MG 46 Conquista, BRSGO Chapadões x UFUS 7910 and TMG4182 x BR/MG 46 Conquista are promising for obtaining populations with high productive potential.

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“…Paraná showed negative linear response, with no indication of reaching a state of balance, parallel to the x axis. The superiority of Paranagoiana regarding number of days to flowering in relation to its ancestral genotype Paraná is conditioned by its largest juvenile period, the result of a genic mutation controlled by a recessive allele, as studied by Bonato and Vello (1999). The Bragg and BR 27 (Cariri) cultivars showed the effective gains in late flowering occurred with BR 27 (Cariri), although it was originated by Bragg by backcrossing, and the Bragg showed classical behavior in relation to photoperiod.…”

Section: Resultsmentioning

confidence: 99%

Flowering under short days: juvenile period and inductive phase estimates in soybean genotypes.

Harada¹,

Gonçalves

Kiihl

et al. 2015

ASB J.

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The success in adapting Brazilian soybean cultivars to low latitude regions was attained thanks to the incorporation of the late flowering trait into the germplasm used by breeders. The objective of the presente work was to establish a methodology to estimate the juvenile period and the inductive phase of soybean genotypes. A total of 11 cultivars representing the successful trajectory of the genetic progress of soybean breeding in Brazil were used. The experiments were done under greenhouse conditions in the city of Cambé, PR, Brazil. Seeds were germinated at 14 days intervals and, after emergence, the plants were subjected to continuous light for periods varying from 0 to 56 days. The number of days for flowering under the diferente light regimes and sowing times was evaluated. A decreasing exponential regression model was adjusted, through the differences between the maximum and minimum partial points of the function, in order to estimate the juvenile period. Results showed that, except for ‘Viçoja’, all the other cultivars fitted into the model. ‘Paraná’ had an almost linear behavior with the equilibrium point at the zero value. ‘Paranagoiana’ was the cultivar with the largest and most significant juvenile period while ‘Viçoja’ and ‘ÚFV-1’ showed the lowest juvenile period. The methodology developed appeared to be robust and was validated by the known behavior of such cultivars when sowed under short day conditions that occurs either in low latitudes or anticipated and delayed sowing seasons

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Aspectos genéticos do tempo para o florescimento em variantes naturais de soja

Cited by 10 publications

References 7 publications

Estimativas de parâmetros genéticos da qualidade fisiológica de sementes de genótipos de soja produzidas em diferentes regiões de Minas Gerais

Estimativas de parâmetros genéticos da qualidade fisiológica de sementes de genótipos de soja produzidas em diferentes regiões de Minas Gerais

Combinatorial analysis of agronomic characters in soybean

Flowering under short days: juvenile period and inductive phase estimates in soybean genotypes.

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