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SciELO - Scientific Electronic Library Online (52,375 recursos)
SciELO (Scientific Electronic Library Online) is an electronic library covering a selected collection of Brazilian scientific journals. The objective of the site is to implement an electronic virtual library, providing full access to a collection of serial titles, a collection of issues from individual serial titles, as well as to the full text of articles. The project envisages the development of a common methodology for the preparation, storage, dissemination and evaluation of scientific literature in electronic format.

Mostrando recursos 81 - 100 de 112

81. Chromosomal evolution and comparative gene mapping in the Drosophila repleta species group - Ruiz,Alfredo; Ranz,José María; Cáceres,Mario; Segarra,Carmen
A review of our recent work on the cromosomal evolution of the Drosophila repleta species group is presented.

82. Chromosomal polymorphism in urban populations of Drosophila paulistorum - Valiati,Victor Hugo; Valente,Vera Lucia S.
Drosophila paulistorum populations colonizing the urban area of Porto Alegre, southern Brazil, were studied with the objective of characterizing their chromosomal polymorphism in this new environment.

83. Reproductive isolation between Anastrepha bistrigata and A. striata (Diptera, Tephritidae) - Selivon,Denise; Morgante,João S.
The reproductive isolation between two closely related species, Anastrepha bistrigata and A.

84. Egg size, yolk mass extrusion and hatching behavior in two cryptic speciesof Anastrepha fraterculus (Wiedemann) (Diptera, Tephritidae) - Selivon,Denise; Morgante,João S.; Perondini,André Luiz P.
For both types, in regard to yolk mass extrusion, four classes of embryos were detected.

85. Genetic variability of behaviorin Melipona quadrifasciata(Hymenoptera: Meliponinae) - Waldschmidt,Ana Maria; Campos,Lúcio Antônio Oliveira; Marco Jr.,Paulo De
Observation colonies containing only young workers from 10 matrix colonies were set up to investigate the genetic aspects involved in task division in Melipona quadrifasciata.

86. Sex determination in honey bees (Apinae and Meliponinae) and its consequences - Kerr,Warwick Estevam
The first experiments on sex determination in bees began with Dzierzon, Meves, Nachtsheim, Paulcke, Petrunkewitsch, Manning.

87. Molecular cloning of exons II and III of the a-globin major gene from Odontophrynus americanus 2n and 4n (Amphibia, Anura) - Acedo,Maria Dolores P.; Paranhos-Baccalà,Gláucia; Denoya,Claudio D.; Ruiz,Itamar R.G.
The a-globin major genes from diploid and tetraploid Odontophrynus americanus were studied using PCR-based technology.

88. Prolactin inhibits auto- and cross-induction of thyroid hormone and estrogen receptor and vitellogenin genes in adult Xenopus (Amphibia) hepatocytes - Rabelo,Elida M.L.; Tata,Jamshed R.
This response to T3 is accompanied by the upregulation of thyroid hormone receptor b (TRb) mRNA.

89. Milk protein polymorphisms in Brazilian Zebu cattle - Silva,Ivana Tramontina da; Del Lama,Marco Antonio
Allelic frequencies for a-La, b-Lg, aS1-Cn, b-Cn and k-Cn loci were estimated in six Gyr herds (N = 283), six Guzerat herds (N = 205), one Nelore herd (N = 17) and one Sindi herd (N = 22), all from São Paulo or Minas Gerais State, Brazil.

90. Concanavalin A-reactive nuclear matrix glycoprotein - Vidal,Benedicto de Campos; Maria,Silvya Stuchi; Klaczko,Louis Bernard
The binding capacity of concanavalin A (Con A) to condensed euchromatin and heterochromatin was investigated in chicken erythrocyte nuclei (CEN), mouse liver cells, Zea mays mays meristematic cells and Drosophila melanogaster polytene chromosomes after 4 N HCl hydrolysis to determine whether binding was preferentially occurring in bands and heterochromatin.

91. Calculation of breed direct and maternal genetic fractions and breed specific direct and maternal heterozygosity for crossbreeding data - Van Vleck,L.D.
Teaching, research, and herd breeding applications may require calculation of breed additive contributions for direct and maternal genetic effects and fractions of heterozygosity associated with breed specific direct and maternal heterosis effects.

92. Cytogenetic study of the genus Saguinus (Callithrichidae, Primates) - Dantas,Sandra Maria Mendes de M.; Barros,Regina Maria de Souza
Eight subspecies from the genus Saguinus (S.

93. Evaluation of techniques for C and ASG banding of the mitotic chromosomes of Anastrepha species (Diptera, Tephritidae) - Selivon,Denise; Perondini,André Luiz P.
(Caryologia 47: 241-247, 1994) which produced C and ASG bands in mitotic chromosomes of Ceratitis capitata were applied to the chromosomes of several Anastrepha species.

94. Effects of caffeine on mitotic index in Drosophila prosaltans (Diptera) - Itoyama,Mary Massumi; Bicudo,Hermione Elly Melara de Campos; Cordeiro,José Antônio
The effect of two concentrations of caffeine (1500 mg/ml and 2500 mg/ml) on mitotic indices of Drosophila prosaltans was analyzed in larval brain cells.

95. Chromosome study in two Aratinga species (A. guarouba and A. acuticaudata) (Psittaciformes) - Goldschmidt,Beatriz; Nogueira,Denise M.; Monsores,Denise W.; Souza,Lúcia M.
The karyotypes of two species of Psittacidae of the genus Aratinga, Aratinga guarouba and A.

96. Dominance, codominance and epistasis - Miller,Wilmer J.

97. Correlation between high molecular weight gluten subunits composition and bread-making quality in Brazilian wheat - Schuster,Ivan; Souza,Moacil Alves de; Cardoso,Antônio Américo; Sediyama,Carlos Sigueyuki; Moreira,Maurílio Alves
Although extensive analyses of quality traits such as farinography, sodium dodecyl sulfate (SDS) sedimentation, alveography, and baking are made in breeding programs, these analyses require high amounts of seeds which are obtained only in late generations.

98. Combined selection in early generation testing of self-pollinated plants - Viana,José Marcelo Soriano; Cruz,Cosme Damião
Seven selection indexes based on the phenotypic value of the individual and the mean performance of its family were assessed for their application in breeding of self-pollinated plants.

99. Using the best linear predictor (BLP) in the selection between and among half-sib progenies of the CMS-39 maize population - Pacheco,Cleso Antônio Patto; Ribeiro Júnior,José Ivo; Cruz,Cosme Damião
Data of corn ear production (kg/ha) of 196 half-sib progenies (HSP) of the maize population CMS-39 obtained from experiments carried out in four environments were used to adapt and assess the BLP method (best linear predictor) in comparison with to the selection among and within half-sib progenies (SAWHSP).

100. Potential of twenty exotic germplasms to improve Brazilian maize architecture - Neto,Amadeu Regitano; Nass,Luciano Lourenço; Miranda Filho,José Branco de
Temperate and temperate x tropical germplasms were introduced into the maize breeding of the Department of Genetics (ESALQ-USP).

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