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Floral ontogeny and anatomy of the hemiparasitic shrub Gaiadendron punctatum and a comparison of floral characters in the tribes Gaiadendrinae and Nuytsiae (Loranthaceae)

Suárez, Hernán-Darío; Robayo, Camila; Marquínez, Xavier; Raz, Lauren.
Rev. biol. trop; 69 (3), 2021
Abstract Introducction: Gaiadendron punctatum is a hemiparasitic species of Loranthaceae (Tribe Gaiadendreae) that is widely distributed in mountainous regions of Central and South America. Embryological and phylogenetic studies in the family indicate a trend towards reduction of the gynoecium and ovules...
Loranthaceae/genética, Epistasis Genética
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Selective intra-dinucleotide interactions and periodicities of bases separated by K sites: a new vision and tool for phylogeny analyses

Valenzuela, Carlos Y.
Biol. Res; 50 (), 2017
Direct tests of the random or non-random distribution of nucleotides on genomes have been devised to test the hypothesis of neutral, nearly-neutral or selective evolution. These tests are based on the direct base distribution and are independent of the functional (coding or non-coding) or structural (rep...
Secuencia de Bases/genética, Genoma, Nucleótidos/genética, Filogenia, Análisis de Secuencia de ADN/métodos, Colágeno/genética, ADN Mitocondrial/genética, Drosophila melanogaster/genética, Epistasis Genética/genética, VIH-1/genética, Nucleótidos/química, Células Procariotas/química, Algoritmos, Distribución de Chi-Cuadrado, Estructuras Cromosómicas, Evolución Molecular, Flujo Genético, Periodicidad, Valores de Referencia, Secuencias Repetidas en Tándem
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The structure of selective dinucleotide interactions and periodicities in D melanogaster mtDNA

Valenzuela, Carlos Y.
Biol. Res; 47 (), 2014
BACKGROUND: We found a strong selective 3-sites periodicity of deviations from randomness of the dinucleotide (DN) distribution, where both bases of DN were separated by 1, 2, K sites in prokaryotes and mtDNA. Three main aspects are studied. I) the specific 3 K-sites periodic structure of the 16 DN. II) ...
Evolución Biológica, ADN Mitocondrial/química, Drosophila melanogaster/genética, Epistasis Genética, Nucleótidos/química, Secuencia de Bases/genética, Nucleótidos/genética, Genoma, Fenotipo, Procesos Estocásticos
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