Esteban Hasson

Identifying candidate genes affecting developmental time in Drosophila melanogaster: pervasive pleiotropy and gene-by-environment interaction (2008)

Mensch, Julián, Lavagnino, Nicolás, Carreira, Valeria, Massaldi, Ana, Hasson, Esteban, Fanara, Juan

Abstract Background Understanding the genetic architecture of ecologically relevant adaptive traits requires the contribution of developmental and evolutionary biology. The time to reach the age of...

Evolution of male genitalia: environmental and genetic factors affect genital morphology in two Drosophilasibling species and their hybrids (2007)

Soto, Ignacio M, Carreira, Valeria P, Fanara, Juan J, Hasson, Esteban

Abstract Background The rapid evolution of genital morphology is a fascinating feature that accompanies many speciation events. However, the underlying patterns and explanatory processes remain to be...

Comparative Molecular Population Genetics of the Xdh Locus in the Cactophilic Sibling Species Drosophila buzzatii and D. koepferae (2004)

Piccinali, Romina, Aguadé, Montserrat, Hasson, Esteban

The Xdh (rosy) gene is one of the best studied in the Drosophila genus from an evolutionary viewpoint. Here we analyze nucleotide variation in a 1875-bp fragment of the second exon of Xdh in...

Transpecific Polymorphisms in an Inversion Linked Esterase Locus in Drosophila buzzatii (2003)

Gómez, Gloria A., Hasson, Esteban

Nucleotide variation was studied in a 1.1 kb section of the coding region of an Esterase gene (Est-A) that maps in the center of the segments rearranged by polymorphic inversions in the cactophilic...

The Evolutionary History of Drosophila buzzatii. XXXV. Inversion Polymorphism and Nucleotide Variability in Different Regions of the Second-Chromosome (2003)

Laayouni, Hafid, Hasson, Esteban, Santos, Mauro, Fontdevila, Antonio

Inversions are portions of chromosome where the gene order is reversed relative to a standard reference orientation. Because of reduced levels of recombination in heterokaryotypes, inversions have a...

Adaptive Evolution of the Water Stress-Induced Gene Asr2 in Lycopersicon Species Dwelling in Arid Habitats (2003)

Frankel, Nicolás, Hasson, Esteban, Iusem, Norberto D., Rossi, María Susana

The Asr2 gene encodes a putative transcription factor that is up-regulated in leaves and roots of tomato plants exposed to water deficit stress. This gene was first cloned and characterized in a...

Comparative Molecular Population Genetics of the Xdh Locus in the Cactophilic Sibling Species Drosophila buzzatii and D. koepferae (2003)

Piccinali, Romina, Aguadé, Montserrat, Hasson, Esteban

The Xdh (rosy) gene is one of the best studied in Drosophila from an evolutionary viewpoint. Here we analyze nucleotide variation in an ∼ 1875-bp fragment of the second exon of Xdh in Argentinian...

The Evolutionary History of Drosophila buzzatii. XXXV. Inversion Polymorphism and Nucleotide Variability in Different Regions of the Second Chromosome (2003)

Laayouni, Hafid, Hasson, Esteban, Santos, Mauro, Fontdevila, Antonio

Inversions are portions of a chromosome where the gene order is reversed relative to a standard reference orientation. Because of reduced levels of recombination in heterokaryotypes, inversions have...

Adaptive Evolution of the Water Stress-Induced Gene Asr2 in Lycopersicon Species Dwelling in Arid Habitats (2003)

Frankel, Nicolás, Hasson, Esteban, Iusem, Norberto D., Rossi, María Susana

The Asr2 gene encodes a putative transcription factor that is up-regulated in leaves and roots of tomato plants exposed to water-deficit stress. This gene was first cloned and characterized in a...

Transpecific Polymorphisms in an Inversion Linked Esterase Locus in Drosophila buzzatii (2003)

Gómez, Gloria A., Hasson, Esteban

Nucleotide variation was studied in a 1.1 kb section of the coding region of an Esterase gene (Est-A) that maps in the center of the segments rearranged by polymorphic inversions in the cactophilic...

The Evolutionary History of Drosophila buzzatii. XXXV. Inversion Polymorphism and Nucleotide Variability in Different Regions of the Second-Chromosome (2003)

Laayouni, Hafid, Hasson, Esteban, Santos, Mauro, Fontdevila, Antonio

Inversions are portions of chromosome where the gene order is reversed relative to a standard reference orientation. Because of reduced levels of recombination in heterokaryotypes, inversions have a...

Adaptive Evolution of the Water Stress-Induced Gene Asr2 in Lycopersicon Species Dwelling in Arid Habitats (2003)

Frankel, Nicolás, Hasson, Esteban, Iusem, Norberto D., Rossi, María Susana

The Asr2 gene encodes a putative transcription factor that is up-regulated in leaves and roots of tomato plants exposed to water deficit stress. This gene was first cloned and characterized in a...

Comparative Molecular Population Genetics of the Xdh Locus in the Cactophilic Sibling Species Drosophila buzzatii and D. koepferae (2003)

Piccinali, Romina, Aguadé, Montserrat, Hasson, Esteban

The Xdh (rosy) gene is one of the best studied in Drosophila from an evolutionary viewpoint. Here we analyze nucleotide variation in an ∼ 1875-bp fragment of the second exon of Xdh in Argentinian...

DIRECT AND CORRELATED RESPONSES TO ARTIFICIAL SELECTION ON DEVELOPMENTAL TIME AND WING LENGTH IN DROSOPHILA BUZZATII (2002)

Marcelo D. Cortese, Fabian M. Norry, Romina Piccinali, Esteban Hasson

Developmental time and body size are two positively correlated traits closely related to fitness in many organisms including Drosophila. Previous work suggested that these two traits are involved in...

OVIPOSITION ACCEPTANCE AND FECUNDITY SCHEDULE IN THE CACTOPHILIC SIBLING SPECIES DROSOPHILA BUZZATII AND D. KOEPFERAE ON THEIR NATURAL HOSTS (2001)

Juan J. Fanara, Esteban Hasson

We tested for the occurrence of oviposition acceptance for different media prepared with cactus tissues of three alternative cactus hosts: Opuntia sulphurea, O. quimilo and Trichocereus terschekii...

BEHAVIORAL DIFFERENTIATION IN OVIPOSITION ACTIVITY IN DROSOPHILA BUZZATII FROM HIGHLAND AND LOWLAND POPULATIONS IN ARGENTINA: PLASTICITY OR THERMAL ADAPTATION? (2001)

Jesper Dahlgaard, Esteban Hasson, Volker Loeschcke

Highland populations of several Drosophila species in Argentina were active early in the afternoon in the field as opposed to populations from a much warmer lowland site, where flies were mainly...

THE ROLE OF THE USE OF DIFFERENT HOST PLANTS IN THE MAINTENANCE OF THE INVERSION POLYMORPHISM IN THE CACTOPHILIC DROSOPHILA BUZZATII (2000)

Pedro Fernández Iriarte, Esteban Hasson

Inversion polymorphisms often have been associated with fitness variation. Cactophilic Drosophila buzzatii has been used widely for the study of the maintenance of chromosomal variation. The purpose...