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SciELO - Scientific Electronic Library Online (52,285 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 61 - 80 de 112

61. First description of microchromosome in the Anostomidae fish Schizodon nasutus from Argentina - Pastori,M.C.; Fenocchio,A.S.; López,P.A.
Thirty-six specimens of Schizodon nasutus (Anostomidae-Characiformes) from the middle Paraná River (Posadas, Argentina) were analyzed cytogenetically.

62. Estimates of genetic and phenotypic parameters in a segregant population of rice irrigated by continuous flooding - Santos,Patrícia Guimarães; Soares,Antônio Alves; Ramalho,Magno A.P.
Estimates of genetic and phenotypic parameters were obtained by using data from families of a recurrent selection program in rice.

63. Genetic variability in salt tolerance during germination of Stylosanthes humilis H.B.K. and association between salt tolerance and isozymes - Lovato,Maria Bernadete; Martins,Paulo Sodero
Variation in salt tolerance of six natural populations of Stylosanthes humilis from three ecogeographic regions, Mata (wet tropical climate), Agreste and Sertão (semi-arid tropical climate) of Pernambuco State, Northeast Brazil, was evaluated on germination in 201 mM NaCl.

64. Isozyme markers and genetic variability in three species of Centrosema (Leguminosae) - Penteado,Maria Isabel de O.; García,Pedro; Pérez de la Vega,Marcelino
Isozyme patterns and their genetic control in three Centrosema species are described.

65. Diallel cross analysis for young plants of brachytic maize (Zea mays L.) varieties - Dantas,Ana C. Vello; Miranda Filho,José B.; Alleoni,Maria R.B.
Twenty-eight days after planting, data for eight traits were taken for weights of the total plant (TPW), top plant (TOW), total roots (TRW), seminal roots (SRW), and nodal roots (NRW) and number of total roots (TRN), seminal roots (SRN), and nodal roots (NRN).

66. A search for RFLP markers to identify genes for aluminum tolerance in maize - Torres,Giovana A.; Parentoni,Sidney N.; Lopes,Maurício A.; Paiva,Edilson
The objective of this study was to identify restriction fragment length polymorphism (RFLP) markers linked to QTLs that control aluminum (Al) tolerance in maize.

67. Two point deterministic model for acquisition of in vitro pollen grain androgenetic capacity based on wheat studies - Grando,Magali Ferrari; Moraes-Fernandes,Maria Irene B. de
This article discusses, from the standpoint of cellular biology, the deterministic and indeterministic androgenesis theories.

68. Genetics of resistance to the fungus Helminthosporium sativum in wheat: use of culture filtrates in tissue culture - Barbieri,Rosa Lía; Carvalho,Fernando Irajá Félix de; Dornelles,Ana Lúcia Cunha; Cristaldo,Rosa Maria de Luján Oviedo de; Handel,Cristine Luise
Six wheat genotypes and their F1 and F2 generations were exposed to the action of Helminthosporium sativum culture filtrates to examine the genetics of hexaploid wheat resistance.

69. Plant height reduction in populations of triticale (X triticosecale Wittmack) by induced mutations and artificial crosses - Pandini,Fábio; Carvalho,Fernando Irajá Félix de; Barbosa Neto,José Fernandes
Induced mutations by gamma radiation (0, 5, 10, 20 and 40 kR doses) and reciprocal crosses were tested as mechanisms of enhancing genetic variability for plant height in two triticale cultivars, BR4 and EMBRAPA18.

70. Chromosome number and secondary constriction variation in 51 accessions of a citrus germplasm bank - Guerra,Marcelo; Pedrosa,Andrea; Silva,Ana Emília Barros e; Cornélio,Maria Tereza Marquim; Santos,Karla; Soares Filho,Walter dos Santos
The mitotic chromosomes of 51 citrus accessions from the Centro Nacional de Pesquisa em Mandioca e Fruticultura Tropical, Cruz das Almas, BA, Brazil, were analyzed.

71. Use of canonical variates in genetic divergence studies - Ferreira,Daniel Furtado; Rezende,Gabriel Dehon Sampaio Peçanha
Exact correlation coefficients between a canonical variate and measured traits were derived to evaluate genetic divergence among varieties.

72. Predicting variety composite means without diallel crossing - Chaves,Lázaro J; Miranda Filho,José B. de
Thus, the predicted mean for a quantitative trait of a composite is given by: Yk = a1 sigmaVj + a2sigmaTj + a3 - a4, with coefficients a1 = (n - 2k)/k²(n - 2); a2 = 2n(k - 1)/k²(n - 2); a3 = n(k - 1)/k(n - 1)(n - 2); and a4 = n²(k - 1)/k(n - 1)(n - 2); summation is for j = 1 to k, where k is the size of the composite (number of parental varieties of a particular composite) and n is the total number of parent varieties.

73. Transient expression of a reporter gene introduced by bioballistic bombardment into Racosperma mangium (Leguminosae family) tissues - Quoirin,M.; Aragão,F.; Rech,E.; De Oliveira,D.E.
We report on an assay of direct transfer of DNA into calli and seeds of Racosperma (ex-Acacia) mangium, using a bioballistic method.

74. Deletion/inversion in the X-chromosome and increased telomeric associations in a female with primary amenorrhea - Multani,Asha S.; Shah,Vinod C.; Singh,Divya; Chakravarty,Nivedita; Chinoy,Niloufer J.; Pathak,Sen
We describe a new case of a partial interstitial deletion and inversion of the long arm of the X-chromosome associated with a high incidence of telomeric associations in an 18-year old female who showed underdeveloped secondary sex characteristics, including small breasts and primary amenorrhea.

75. Molecular bases of growth hormone deficiency - Carvallo,Pilar

76. Genética, Ética e Estado: (Genetics, Ethics and State) - Beiguelman,Bernardo

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79. Effects of host resistance on the isozymatic patterns of Bipolaris sorokiniana (Dematiaceae, Moniliales) - Valim-Labres,Marta E.; Porto,Miguel D.M.; Matsumura,Aida T.S.
Nine isolates of Bipolaris sorokiniana were inoculated on three cultivars of wheat plants (susceptible, moderately resistant, resistant).

80. New thermal inducible Streptomyces phages isolated from tropical soils - Balan,Andrea; Padilla,Gabriel
Two new Streptomyces phages, øBP1 and øBP2, were isolated from tropical soil samples.

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