Soybean Breeding Achievements and Challenges

Cianzio, Silvia R.

doi:10.1002/9780470376447.ch9

Cited by 2 publications

(4 citation statements)

References 127 publications

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“…These differences may impact the pathogenesis and cellular interaction of F. virguliforme with the host plant. Based on published information, genetic resistance of soybean to H. glycines adds some beneficial resistance to F. virguliforme but the mechanism of soybean resistance to the fungal pathogen is not fully understood (Cianzo 2007). Breeding of cultivars resistant to SDS is complicated by this synergistic interaction between H. glycines and F. virguliforme.…”

Section: Discussionmentioning

confidence: 99%

Synergism in the interaction of Fusarium virguliforme with Heterodera glycines in sudden death syndrome of soybean

Xing

Westphal

2013

J Plant Dis Prot

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Sudden death syndrome (SDS) of soybean caused by Fusarium virguliforme has increased in geographical distribution in the North Central region of the U.S. The disease often co-occurs with the widely distributed Heterodera glycines. The extensiveness of the interaction of SDS and H. glycines at different soil moisture levels is not fully defined. Further, it is not clear if Meloidogyne spp., that recently is more frequently observed in soybean areas, forms a disease complex with F. virguliforme. In a multi-factor factorial-designed microplot experiment, SDS symptoms and yield parameters were determined following infestation with F. virguliforme and either H. glycines or M. incognita at different soil moisture regimes in different microbial backgrounds rendered by soil fumigation. On soybean 'Williams 82', susceptible to the three pathogens, H. glycines increased severity of foliar symptoms of SDS irrespective of being naturally present or added to previously fumigated soil, while yield parameters declined in the plots co-infested with F. virguliforme. This increase was synergistic in some contexts as determined by Gowing's formula. In pre-season-fumigated soil, only plants in plots concomitantly inoculated with H. glycines and F. virguliforme had more severe SDS than plots with no nematode or M. incognita amendment when the plots were heavily watered (P < 0.01). No synergism between F. virguliforme and M. incognita was detected. The results provided the conceptual framework of the synergistic interaction of H. glycines and F. virguliforme in a disease complex under different soil moisture conditions.

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Section: Discussionmentioning

confidence: 99%

Synergism in the interaction of Fusarium virguliforme with Heterodera glycines in sudden death syndrome of soybean

Xing

Westphal

2013

J Plant Dis Prot

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“…Os programas de melhoramento genético de soja, assim como de outros cereais, tiveram grandes avanços nas últimas décadas (WILCOX, 2001 CIANZIO, 2007;GAMUYAO et al, 2012, RAMALHO et al, 2012.…”

Section: Ganho Genético Nos Programas De Melhoramento Genéticounclassified

“…As cultivares comerciais disponíveis no mercado são obtidas a partir da hibridação entre genitores previamente selecionados para gerar populações segregantes, de onde são selecionadas linhas puras ou misturas de linhas puras (CIANZIO, 2007). Uma população considerada ideal para iniciar o processo de seleção em um programa de melhoramento deve apresentar média alta, bem como alta variabilidade para os caracteres de interesse, para que se tenha sucesso no desenvolvimento de cultivares superiores.…”

Section: Desenvolvimento De Populações Segregantesunclassified

“…melhorado geneticamente até que seja alcançado o limite do potencial de produção do germoplasma elite (USTUN; ALLEN;ENGLISH, 2001;BONATO, 2006;CIANZIO, 2007). Outros autores afirmam ainda que a variabilidade nunca irá se exaurir, principalmente com relação aos caracteres mais complexos, como a produção de grãos, que estão sob o controle de uma grande quantidade de locos(RAMALHO et al, 2012).…”

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Intercruzamento em uma população de soja derivada de um retrocruzamento e perspectivas de melhoramento

Castro¹

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AGRADECIMENTOS A DeusAos meus pais, pelo exemplo de vida e pela força que me estimularam a crescer e me desenvolver como pessoa e como profissional.Ao professor Isaias Olívio Geraldi, pela amizade, orientação e ensinamentos.Márcia, Marco e Agnaldo e, em especial, ao Guilherme por todos os anos de companheirismo e amizade.Aos amigos do Departamento de Genética, que estiveram sempre presentes nos momentos de descontração e para dar um apoio nos momentos de dificuldade e, em especial, à Flávia e à Luciana, amigas para todo o sempre.Ao César pelo apoio e carinho indispensáveis para a conclusão desse trabalho. 8 9 EPÍGRAFE Se temos de esperar, que seja para colher a semente boa que lançamos hoje no solo da vida.Se for para semear, então que seja para produzir milhões de sorrisos, de solidariedade e amizade. Cora Coralina10 11 SUMÁRIO RESUMO. ABSTRACT Random mating in a soybean backcross population and breeding perspectivesThere is limited information on using random mating after backcrossing in soybeans. This work was carried out to evaluate the effects of one generation of random mating after backcrossing on the means, frequency distributions, genetic variances and responses to selection in a soybean population. The basic population was derived from a two-way cross between two inbred lines contrasting for grain yield and backcrossed to the higher yielding one. One hundred and seventeen progenies derived from a not random-mated backcross population (RC 1 F 2 progenies) and one hundred and eighteen progenies derived from a random-mated backcross population (RC 1# F 2 progenies) were evaluated in the 2008/09 growing season at Anhumas Experimental Station, of the Department of Genetics, ESALQ/USP, located in Piracicaba, state of São Paulo, Brazil. Evaluation trials were carried out using an 11x 11 quadruple lattice design (four replications). Plots consisted of 2 m rows spaced by 0.5 m, with 30 plants after thinning. The entries were harvested in bulks (which correspond to RC 1 F 3 and RC 1# F 3 progenies) and evaluated again in the 2010/11 growing season, using the same experimental design, plot size and location. The following traits were recorded: number of days to flowering (DF), plant height at flowering (AF), number of days to maturity (DM), plant height at maturity (AM), and grain yield (PG). The following parameters were estimated for both RC 1 and RC 1# : general mean, amplitude of variation, frequency distribution, genetic variance among progenies (

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Soybean Breeding Achievements and Challenges

Cited by 2 publications

References 127 publications

Synergism in the interaction of Fusarium virguliforme with Heterodera glycines in sudden death syndrome of soybean

Synergism in the interaction of Fusarium virguliforme with Heterodera glycines in sudden death syndrome of soybean

Intercruzamento em uma população de soja derivada de um retrocruzamento e perspectivas de melhoramento

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