Esverdeamento de tubérculo em genótipos de batata.

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Litterfall production and nutrient cycling on caatinga woody leguminous.

The knowledge on nutrient cycling through litter is important for the management of the species in agroforestry systems (SAFs), since the litter is an important way of making plant nutrients available to soil. The aim of this work was to evaluate the litterfall production and nutrient cycling of woody species in an agroforestry system of Caatinga. The study was developed in SAF belonging to Embrapa Goats and Sheep, located in the county of Sobral-CE, Brazil. The evaluated species were four native leguminous from Caatinga: Mimosa caesalpiniifolia (sabiá), Mimosa tenuiflora (jurema-preta), Libidibia férrea (jucá) and Poncianella piramydalis (catingueira). To collect the litter, collectors were installed under the tree canopy, using six replicates for each species evaluated

Multiplicação e conservação de orquídeas da Mata Atlântica e Caatinga.

Embora seja possível encontrar orquídeas praticamente em todo o tipo de habitats (exceto nos desertos mais extremos e nas zonas polares), elas atingem a sua máxima diversidade nas regiões tropicais. No entanto, devido a diversos fatores, muitas espécies de orquídeas estão ameaçadas de extinção, tornando-se necessária a adoção de medidas que evitem perdas dentro da família Orchidaceae

Genetic Distance Based On Ssr And Grain Yield Of Inter And Intrapopulational Maize Single Cross Hybrids

The objective of this work was to correlate the genetic distances between the progenitors obtained by microsatellite markers with the grain yield of inter and intrapopulational maize single cross hybrids. Three S 0 populations derived from commercial single cross hybrids were used to obtain 163 hybrids (110 interpopulational and 53 intrapopulational). The two best hybrids and two worst hybrids of each the inter- and intrapopulational crosses were selected and their progenitors maintained through self-pollination of the second ear of each S 0 plant, genotyped with 47 SSRs. The Modified Roger's Distance (MRD) between each pair of S 1 inbred lines, the number of alleles and the polymorphic information content (PIC) of each primer were estimated. The genetic distances between progenitors were correlated with the grain yield of the inter- and intrapopulational hybrids. The number of obtained alleles was 186, with a mean of 3.96 alleles. The PIC varied from 0.49 to 0.80, with a mean of 0.65. The mean genetic distance between all S 1 inbred lines was 0.75, varying from 0.40 to 0.89, indicating the existence of variability between the S 1 inbred lines. The correlation between MRD and grain yield was high and significant for the interpopulational crosses (r = 0.84, P ≤ 0.01) and low and not significant (r = 0.18, P ≥ 0.05) for intrapopulational crosses.5103/04/15507513Ajmone Marsan, P., Castiglioni, P., Fu Sari, F., Kuiper, M., Motto, M., Genetic diversity and its relationship to hybrid performance in maize as revealed by RFLP and AFLP markers (1998) Theor. Appl. Genet., 96, pp. 219-227Árcade, A., Faivre-Rampant, P., Le Guerroué, B., Paques, L.E., Prat, D., Heterozigosity and hybrid performance in larch (1996) Theor. Appl. Genet., 93, pp. 1274-1281Barbosa, A.M.M., Geraldi, I.O., Benchimol, L.L., Garcia, A.A.F., Souza Jr., C.L., Souza, A.P., Relationship of intra and interpopulation tropical maize single cross hybrid performance and genetic distances computed from AFLP and SSR markers (2003) Euphytica, 87, pp. 87-99Benchimol, L.L., Souza Jr., C.L., Garcia, A.A.F., Kono, P.M.S., Mangolin, C.A., Barbosa, A.M.M., Coelho, A.S.G., Souza, A.P., Genetic diversity in tropical maize inbred lines: Heterotic group assignment and hybrid performance determined by RFLP markers (2000) Plant Breed., 119, pp. 491-496Boppenmaier, J., Melchinger, A.E., Brunklaus-Junt, E., Geiger, H.H., Genetic diversity for RFLP in European maize inbreds: Relation to performance of flint x dent crosses for forage traits (1992) Crop Sci., 32, pp. 895-902Butstein, D., White, M., Sholnick, M., David, R.W., Construction of a genetic linkage map in man using restriction fragment length polymorphisms (1980) Am. J. Hum. Genet., 32, pp. 314-331Cheres, M.T., Miller, J.F., Crane, J.M., Knapp, S.J., Genetic distance as a predictor of heterosis and hybrid performance within and between heterotic groups in sunflower (2000) Theor. Appl. Genet., 100, pp. 889-894Cruz, C.D., Shuster, I., (2004) GQMOL: Aplicativo Computacional para Análise de Dados Moleculares e de Suas Associações Com Caracteres Quantitativos. Versão 2004.2.1, , Viçosa. MGDhillon, B.S., Boppenmaier, J., Pollmer, R.G., Hermann, R.G., Melchinger, A.E., Relationship of restriction length polymorphisms among european maize inbreds with ear dry matter yield of their hybrids (1993) Maydica, 38, pp. 245-248Drinic, S.M., Trifunovic, S., Drinic, G., Konstantinov, K., Genetic divergence and its correlation to heterosis in maize as revealed by SSR base markers (2002) Maydica, 47, pp. 1-8Goodman, M.M., Stuber, C.W., Races of maize: VI. Isozyme variation among races of maize in Bolivia (1983) Maydica, 28, pp. 169-187Hallauer, A.R., Miranda Filho, J.B., (1988) Quantitative Genetics in Maize Breeding, 468p. , Iowa State University Press, AmesKruskal, J.B., Multidimensional scaling by optimizing goodness of fit to a no metric hypothesis (1964) Psychometrika, 29, pp. 1-27Lanza, L.L.B., Souza Jr., C.L., Ottoboni, I.M.M., Vieira, M.L.C., Souza, A.P., Genetic distance of inbred lines and prediction of maize single-cross performance using RAPD markers (1997) Theor. Appl. Genet., 94, pp. 1023-1030Le Clerc, V., Bazante, F., Baril, C., Guiard, J., Zhang, D., Assessing temporal changes in genetic diversity of maize varieties using microsatellite markers (2005) Theor. Appl. Genet., 110, pp. 294-302Lee, M., Godshalk, E.B., Lamkey, K.R., Woodman, W.W., Association of restriction fragment length polymorphisms among maize inbreds with agronomic performance of their crosses (1989) Crop Sci., 29, pp. 1067-1071Lu, H., Bernardo, R., Molecular marker diversity among current and historical maize inbreds (2001) Theor. Appl. Genet., 103, pp. 613-617Malécot, G., (1948) Les Mathématiques de l'Hérédite, , Masson et Cie, ParisMantel, N., The detection of disease clustering and a generalized regression approach (1967) Cancer Res., 37, pp. 209-220Melchinger, A.E., Genetic diversity and heterosis (1999) The Genetics and Exploitation of Heterosis in Crops, pp. 99-118. , J.G. Coors, S. Pandey (Eds.), Am. Soc. Agron. Madison WIMenkir, A., Melake-Berhan, A., Ingelbrecht, A.T., Adepoju, A., Grouping of tropical mid-altitude maize inbred lines on the basis of yield data and molecular markers (2004) Theor. Appl. Genet., 108, pp. 1582-1590Mille, M., (1997) TFPGA: Toll for Population Genetic Analysis, Version 1.3, , Northern Arizona UniversityPejic, I., Ajmone Marsan, P., Morgante, M., Kozumplick, V., Castiglioni, P., Taramino, G., Motto, M., Comparative analysis of genetic similarity among maize inbred lines detected by RFLPs, RAPDs, SSRs, and AFLPs (1998) Theor. Appl. Genet., 97, pp. 1428-11255Reif, J.C., Melchinger, A.E., Frisch, M., Genetical and mathematical properties of similarity and dissimilarity coefficients applied in plant breeding and seed bank management (2005) Crop Sci., 45, pp. 1-7Reif, J.C., Melchinger, A.E., Xia, X.C., Warburton, M.L., Hoisington, D.A., Vasal, S.K., Srinivasan, G., Frisch, M., Genetic distance based on simple sequence repeats and heterosis in tropical maize populations (2003) Crop Sci., 43, pp. 1275-1282Reif, J.C., Melchinger, A.E., Xia, X.C., Warburton, M.L., Hoisington, D.A., Vasal, S.K., Beck, D., Frisch, M., Use of SSRs for establishing heterotic groups in subtropical maize (2003) Theor. Appl. Genet., 107, pp. 947-957Rohlf, F.J., (2000) NTSYS-pc: Numerical Taxonomy and Multivariate Analysis System. Version 2.1, , Exeter Software. Setauket. NYSaghai-Maroof, M.A., Soliman, K.M., Jorgensen, R.A., Allard, R.W., Ribosomal DNA spacer length polymorphism in barley: Mendelian inheritance, chromosomal location, and population dynamics (1984) Proc. Natl. Acad. Sci. USA, 83, pp. 1757-1761(1998) SAS Language Guide for Personal Computers. Release 6.03 Ed., , SAS INSTITUTE, SAS Inst. Cary. NCSibov, S.T., Souza Jr., C.L., Garcia, A.A.F., Silva, A.R., Garcia, A.F., Mangolin, C.A., Benchimol, L.L., Souza, A.P., Molecular mapping in tropical maize (Zea mays L.) using microsattelite markers. 2. Quantitative trait loci (QTL) for grain yield, plant height, ear height and grain moisture (2003) Hereditas, 139, pp. 107-115Smith, O.S., Smith, J.S.C., Bowen, S.L., Tenborg, R.A., Wall, S.J., Similarities among a group of elite inbreds as measured by pedigree, F 1 heterosis, and RFLPs (1990) Theor. Appl. Genet., 80, pp. 833-840Steel, R.G.D., Torrie, J.H., (1980) Principles and Procedures of Statistics. 2. Ed., 633p. , New York: McGraw HillVaz Patto, M.C., Satovic, Z., Pêgo, S., Fevereiro, P., Assessing the genetic diversity of Portuguese maize germoplasm using microsatellite markers (2004) Euphytica, 137, pp. 63-72Xia, X.C., Reif, J.C., Hoisington, D.A., Melchinger, A.E., Frisch, M., Warburton, M.L., Genetic diversity among CIMMYT maize inbred lines investigated with SSR markers (2004) Crop Sci., 44, pp. 2230-2237Xu, S., Liu, J., Liu, G., The use of SSRs for predicting the hybrid yield and yield heterosis in 15 key inbred lines of Chinese maize (2004) Hereditas, 141, pp. 207-21

Micobiota do solo de uma área de duna na restinga da Marambaia, Rio de Janeiro, RJ.

Este trabalho avaliou a micobiota do solo de uma duna nos terços inferior, médio e superior de encosta, localizada na Restinga da Marambaia, RJ. A área de estudo com aproximadamente 500 m2 está dividida em três terços, com a vegetação variando de arbustiva a arbórea. Foi delimitada uma gleba de dimensões de 50 x 50 m, onde foram abertas cinco minitrincheiras até a profundidade de 10 cm para coleta, sendo coletadas três amostras compostas formadas a partir da reunião de cinco amostras simples para análise do solo e caracterização da micobiota. A fertilidade do solo indicou que o terço inferior apresentou maiores teores de alumínio e menores de nutrientes. As unidades formadoras de colônias de fungos variaram de 4,6 x 103 a 9 x 104 ufc.g-1. Quarenta e nove fungos, num total de 85 isolados, pertencentes a 13 gêneros e 32 espécies foram identificados. Os gêneros mais frequentes foram Penicillium, Aspergillus e Trichoderma. A maior riqueza ocorreu no terço médio, porém uma espécie (Trichoderma pseudokoningi) foi comum entre as áreas. Este trabalho sugere que a Restinga da Marambaia apresenta grande diversidade fúngica

Nutrição e teor de nitrato em frutos de berinjela com uso de esterco bovino e termofosfato magnesiano.

Foi avaliado o efeito de doses de esterco bovino e de termofosfato magnesiano, associadas à urina de vaca, sobre a nutrição e o teor de nitrato em frutos de berinjela

Análise de componentes principais aplicada aos teores de macronutrientes e nitrato em frutos de berinjela cultivada com esterco bovino e termofosfato magnesiano.

Objetivou-se estudar o crescimento da berinjela, cultivada com doses de esterco bovino e termofosfato magnesiano, utilizando-se a técnica multivariada de componentes principais.Resumo 785