Wilmar Ferreira Lima

New soybean (Glycine max Fabales, Fabaceae) sources of qualitative genetic resistance to Asian soybean rust caused by Phakopsora pachyrhizi (Uredinales, Phakopsoraceae)

Asian soybean rust (ASR), caused by the phytopathogenic fungi Phakopsora pachyrhizi, has caused large reductions in soybean (Glycine max) yield in most locations in Brazil where it has occurred since it was first reported in May 2001. Primary efforts to combat the disease involve the development of resistant cultivars, and four dominant major genes (Rpp1, Rpp2, Rpp3 and Rpp4) controlling resistance to ASR have been reported in the literature. To develop new long-lasting soybean ASR resistance genes, we used field experiments to assess ASR leaf lesion type in 11 soybean genotypes (BR01-18437, BRS 184, BRS 231, BRS 232, BRSGO Chapadoes, DM 339, Embrapa 48, PI 200487, PI 230970, PI 459025-A and PI 200526) and the 55 F2 generations derived from their biparental diallel crosses. The results indicated that PI 200487 and PI 200526 carry different dominant resistance major genes which are both different from Rpp2 through Rpp4. Furthermore, resistance to ASR in BR01-18437 is controlled by a single recessive major gene, also different from Rpp1 through Rpp4 and different from the genes in PI 200487 and PI 200526.

Interação genótipo-ambiente de soja convencional e transgênica resistente a glifosato, no Estado do Paraná

Os objetivos deste trabalho foram: comparar a produtividade e a adaptacao de genotipos de soja convencional e de soja transgenica resistente ao herbicida glifosato, de diferentes grupos de maturacao, desenvolvidos pelo programa de melhoramento da Embrapa Soja para o Estado do Parana; estudar a importância relativa dos efeitos de local, ano, cultivar e suas respectivas interacoes; e verificar a possibilidade de se estratificar o Estado em regioes mais homogeneas, para reduzir o numero de locais nos ensaios de competicao de linhagens. Foram utilizados dados de produtividade de graos de ensaios regionais, no Estado do Parana, entre 2001 e 2005. O delineamento experimental utilizado foi o de blocos ao acaso. A possibilidade de se realizar a estratificacao do Estado em regioes mais homogeneas e de descarte de locais foi verificada pela significância da interacao genotipo x ambiente entre locais. Nao houve diferenca significativa de produtividade entre a soja convencional e a transgenica, independentemente do grupo de maturacao. O efeito de local foi mais importante que o efeito de ano, na composicao dos ambientes. A estratificacao do Estado do Parana em regioes nao trouxe vantagens, nos anos analisados, para os testes de linhagens; apenas os locais da regiao Sul mostraram algum grau de similaridade entre si.

Food type soybean cooking time: a review

Soybean is an extensive crop that produces more protein per hectare and, compared to other sources, has the lowest protein cost. This turns soybean into one of the basic foods with the potential to fight malnutrition and hunger in the planet. Even though it represents the fourth crop in grain production in the world (261 million tons year-1), most of its production is used as animal fodder. Currently, one of the greatest research challenges is to improve soybean production for human consumption. Cooking time is one the several characteristics that need improvement so that soybean can be used more extensively in our everyday diet. The objective of this work is to carry out a bibliographic review on the topic, to sensitize researchers in the area of soybean breeding about its importance.

Resistência da soja à ferrugem-asiática avaliada pela análise da produtividade de grãos

The main objectives of this work were to study the soybean resistance and/or tolerance to Asian rust and to select the inbred lines more productive in relation to Asian rust. Data from six experiments involving the parental lines and their F2, F3 and F4 generations were used in this experiment. It was carried out in Londrina, Parana state, during the 2005/06, 2006/07 and 2007/08 cropping seasons. A completely randomized experiment with individual plants sown in hill plot was used (01 hill plot = 01 plant). Soybean resistance and/or tolerance to Asian rust is controlled by major and minor genes expressing mainly additive effects dispersed in the parents. It is possible to select inbred lines superior to the best yielding parent from most crosses. The narrow sense heritability for the yield trait under rust pressure ranged from average to high (0.324 to 0.815) at the F3 progeny level, which warrants gains from selection.

Statistical methods to study adaptability and stability in breeding lines of food-type soybeans

Bragantia, Campinas, v. 77, n. 2, p.253-264, 2018 ABSTRACT: The grains of food-type soybean cultivars, which are characterized by the absence of lipoxygenases and the presence of high levels of proteins and isoflavones, are regarded as functional foods with high acceptance by consumers. However, few cultivars of food-type soybeans are currently available in the Brazilian market. The aim of this work was to study the adaptability and stability of various genotypes of food-type soybeans and to compare the performance of methods, which are based on analysis of variance, non-parametric, regression, multivariate and mixed models. Ten lines of food-type soybeans obtained from the Breeding Program of Soybeans for Human Consumption of the State University of Londrina (UEL/BPSHC) and two commercial varieties, the foodtype cultivar BRS 257 and the cultivar BMX Potência RR, were evaluated in the counties of Londrina, Guarapuava, Ponta Grossa PLANT BREEDING Article

Metodologias para obtenção de resistência e/ou tolerância da soja à ferrugem-asiática

ABSTRACT A soja ( Glycine max (L.) Merrill) e a cultura com a maior areacultivada no Brasil. Na safra de 2010/2011 a area cultivada foi de24,17 milhoes de hectares, seguida pelo milho com 13,29 milhoes dehectares e pela cana-de-acucar com 8,03 milhoes de hectares (6). OBrasil e o segundo produtor mundial de soja, sendo responsavel poraproximadamente 27,7% da producao mundial (22).A ferrugem-asiatica ( Phakopsora pachyrhizi Syd. e P. Syd.) foidetectada pela primeira vez no Brasil no final da safra 2000/01. Nasafra 2001/02 foi relatada nas principais regioes produtoras, desde oRio Grande do Sul ate o Mato Grosso, onde nos casos mais severos,as perdas atingiram ate 70% (25). Na safra seguinte espalhou-se empraticamente todas as regioes produtoras, representando uma ameacapara a cultura em funcao dos prejuizos causados e do aumento docusto de producao para seu controle (8).O uso de cultivares resistentes e/ou tolerantes e o metodo decontrole mais eficiente e barato para os produtores, alem de ser o maisadequado as praticas de conservacao do ambiente. Devido ao fungo