Results 1 to 10 of about 1,457 (131)

Tell Me How Much DNA You Have and I'll Tell You What Your Sex Is: Sex Determination by Flow Cytometry of Spiderlings of <i>Allocosa marindia</i>. [PDF]

Ecol Evol
The manuscript addresses the sex determination of spiderlings of the wolf spider Allocosa marindia using flow cytometry. Spiders are born with a defined sex, but it is not possible to determine their sex phenotypically until the adult or near‐adult stage. Sex identification at early stages of development is of great interest for studies in evolutionary
Bidegaray-Batista L, Kacevas N, Santiñaque FF, Vaio M, González M.   +4 more
europepmc   +2 more sources

Effects of the Ecuadorian Andes on genetic structure of the spectacled bear with new genetic datasets [PDF]

Scientific Reports
The Andes arguably contains the most important biodiversity hot spot (Tropical Andes) in the world and is home to the only extant bear (spectacled bear, Tremarctos ornatus), in South America.
Manuel Ruiz-García, Armando Castellanos, Jessica Yanina Árias-Vásquez, Joseph Mark Shostell   +3 more
doaj   +2 more sources

Genetic origins and climate-induced erosion in economically important Asian walnuts. [PDF]

Conserv Biol
Abstract The global climate is undergoing unprecedented changes, posing significant threats to species persistence. However, the spatiotemporal impacts on genetic diversity remain poorly understood, hindering species conservation and management. Walnuts, generally referred to as Juglans regia and J. sigillata, are economically vital in Asia, but little
Fan PZ, Zhu GF, Wambulwa MC, Milne RI, Wu ZY, Luo YH, Shahi Shavvon R, Jump AS, Maity D, Gao LM, Qi HL, Wu HY, Kong X, Khan R, Yan LJ, Turuspekov Y, Li DZ, Liu J.   +17 more
europepmc   +2 more sources

Patterns of Interploidy Admixture in Polyploid Complexes: Insights From Thymus Sect. Mastichina (Lamiaceae). [PDF]

Mol Ecol
ABSTRACT Understanding gene flow between ploidy levels in polyploid complexes is essential for species delimitation and conservation. This study explores evolutionary dynamics in the polyploid complex Thymus sect. Mastichina (Lamiaceae), comprising three taxa: T. mastichina subsp. mastichina, T. mastichina subsp.
García-Cárdenas FJ, Ortiz MÁ, Del Valle JC, Doblas-Pruvost D, de la Estrella M, Nieto-Lugilde D, Pokorny L, Berjano R.   +7 more
europepmc   +2 more sources

Twins from different fathers: A heteropaternal superfecundation case report in Colombia

Biomédica: revista del Instituto Nacional de Salud, 2020
Heteropaternal superfecundation is an extremely rare phenomenon that occurs when a second ova released during the same menstrual cycle is additionally fertilized by the sperm cells of a different man in separate sexual intercourse.
Fernanda Mogollón, Andrea Casas-Vargas, Fredy Rodríguez, William Usaquén   +3 more
doaj   +1 more source

Diversidad genética y estructura genética del paisaje de Capsicum annuum L., de poblaciones silvestres, de traspatio y cultivadas en un ambiente heterogéneo en Oaxaca, México

Polibotánica, 2022
Las especies domesticadas, han sido expuestas durante su evolución a presiones que ocurrieron a diferentes intensidades y regulan la variación de la estructura genética, fenotípica y la divergencia entre poblaciones cultivadas y silvestres.
Juan Manuel Peñaloza Ramirez, Ricardo Toxqui-Tapia, Antonio Pacheco Olvera, Ana Luisa Albarran Lara, Ken Oyama Nakawa   +4 more
doaj   +1 more source

Can contrasting environmental conditions of mangroves induce morphological variability in Aratus pisonii (Crustacea: Brachyura: Sesarmidae)?

Scientia Marina, 2016
Aratus pisonii is one of the most common crab species in Neotropical mangroves. It shows great plasticity in its life history traits, which makes it an interesting subject for comparative studies. This study evaluated the morphometric variability in five
Beatriz López-Sánchez, Enrique Quintero-Torres, Adriana Oliveiras-Durand   +2 more
doaj   +1 more source

Paciente masculino con cariotipo 46 XX negativo para el gen SRY y sin ambigüedad genital: reporte de un caso

Biomédica: revista del Instituto Nacional de Salud, 2019
En la mayoría de los casos, la diferenciación sexual masculina ocurre con la participación del gen SRY. Sin embargo, se pueden presentar otros genotipos excepcionales, como en el caso que se presenta en este reporte.
Andrea Casas-Vargas, Johanna Galvis, Jenny Blanco, Laura Rengifo, William Usaquén, Harvy Velasco   +5 more
doaj   +1 more source

Mitochondrial DNA diversity in prehispanic bone remains on the eastern Colombian Andes

Biomédica: revista del Instituto Nacional de Salud, 2017
Introduction: DNA extracted from ancient human bones allows to analyze the genetic makeup of pre-Columbian populations and to determine the dynamics that gave rise to the diversity of contemporary populations.
Andrea Casas-Vargas, Liza M. Romero, William Usaquén, Sara Zea, Margarita Silva, Ignacio Briceño, Alberto Gómez, José Vicente Rodríguez   +7 more
doaj   +1 more source

Estructura genética de un árbol tropical dispersado por aves (Dendropanax arboreus) en un paisaje fragmentado en México

Revista Mexicana de Biodiversidad, 2010
Se analizó la estructura genética del árbol tropical Dendropanax arboreus (Araliaceae) en relación con la fragmentación del hábitat en la selva tropical de Los Tuxtlas, Veracruz, México.
Elsa M. Figueroa Esquivel, Fernando Puebla Olivares, Luis E. Eguiarte, Juan Núñez-Farfán   +3 more
doaj   +1 more source