Results 1 to 10 of about 651 (112)

Mutational load and adaptive variation are shaped by climate and species range dynamics in Vitis arizonica. [PDF]

New Phytol
Summary Genetic load can reduce fitness and hinder adaptation. While its genetic underpinnings are well established, the influence of environmental variation on genetic load is less well characterized, as is the relationship between genetic load and putatively adaptive genetic variation.
Fiscus CJ, Aguirre-Liguori JA, Gaut GRJ, Gaut BS.   +3 more
europepmc   +2 more sources

The frequency and importance of polyploidy in tropical rainforest tree radiations. [PDF]

New Phytol
Summary The presence of more than two copies of the genome in an organism, termed ‘polyploidy’, is a crucial force in plant evolution, generating genetic, phenotypic and ecological diversity. [Correction added on 22 January 2026, after first online publication: the preceding sentence has been corrected.] The Amazonian tree flora is the most species ...
Schley RJ, Piñeiro R, Nicholls JA, Gaynor ML, Lewis GP, Fonseca Pezzini F, Dexter KG, Kidner C, Pennington RT, Twyford AD.   +9 more
europepmc   +2 more sources

A Dominant Founder Lineage Has Possible Fitness Costs for the Endangered Mexican Grey Wolf. [PDF]

Mol Ecol
ABSTRACT The Mexican grey wolf (Canis lupus baileyi) is an endangered and genetically distinct subspecies of grey wolf adapted to the warm climates of the southwestern United States and Mexico. Following centuries of eradication efforts, Mexican grey wolves were protected under the Endangered Species Act in 1976, prompting an international ex situ ...
Loera Y, Khakoo M, Krueckeberg E, Nilsson IG, Wu Z, Dwire M, Adams J, Waits L, Oakleaf JK, Campbell ML, Dunnum JL, Cook JA, vonHoldt BM.   +12 more
europepmc   +2 more sources

Variation in responses to temperature in admixed Populus genotypes predicts geographic shifts in regions where hybrids are favored. [PDF]

New Phytol
Summary Plastic responses of plants to their environment vary as a result of genetic differentiation within and among species. To accurately predict rangewide responses to climate change, it is necessary to characterize genotype‐specific reaction norms across the continuum of historic and future climate conditions comprising a species' range. The North
Mead A, Beasley-Bennett JR, Bleich A, Fischer D, Flint S, Golightly J, Kalcsits L, Klopf SK, Kulbaba MW, Lasky JR, LeBoldus JM, Lowry DB, Mitchell N, Moran E, Sexton JP, Søndreli KL, Worthing B, Zavala-Paez M, Fitzpatrick MC, Holliday J, Keller S, Hamilton JA.   +21 more
europepmc   +2 more sources

Anthropogenic or Natural Dispersal: Case of the Spiny-Tailed Iguanas (<i>Ctenosaura</i>) on Clarion Island, Mexico. [PDF]

Ecol Evol
Species can colonize oceanic islands by both natural and human‐assisted dispersal and human‐caused species introductions have had catastrophic effects on ecosystems around the world. The Spiny‐tailed Iguanas inhabiting Clarion Island were previously considered introduced. Molecular data and analyses support iguanas' arrival on Clarion Island by natural
Mulcahy DG, Reyes-Velasco J, Vázquez-Arce DI, Cervantes-Pasqualli JA, Martínez-Gómez JE, de Queiroz K.   +5 more
europepmc   +2 more sources

Variación genética de cuatro especies de árboles tropicales de la Reserva de la Biosfera Selva El Ocote, Chiapas, México

Acta Botanica Mexicana, 2021
Antecedentes y Objetivos: La variación genética de especies de árboles es escasamente conocida para los bosques tropicales de México. El objetivo fue analizar la diversidad genética de Brosimum alicastrum (Moraceae) y Sapium macrocarpum (Euphorbiaceae) (
Lorena Ruiz-Montoya, María Zenaida López-López, Consuelo Lorenzo, Maricela García-Bautista, Neptalí Ramírez-Marcial   +4 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

Técnicas moleculares para la detección de variantes somaclonales

Agronomía Mesoamericana, 2008
La variación somaclonal es la variación genética o epi genética que se genera durante el cultivo in vitro de plantas (cultivos celulares de tejidos u órganos) que provenga de células somáticas.
Neiva Sánchez Chiang, Víctor M. Jiménez   +1 more
doaj   +1 more source

Caracterización molecular de Trichoderma spp. en arveja Pisum sativum L.

Revista de Ciencias Agrícolas, 2015
Mediante marcadores RAPDs se determinó la variabilidad genética de aislamientos de Tricoderma spp. encontrándose alto polimorfismo con los primeros OPA 03, OPD 05, OPA 01 y OPB 01.
Oscar Eduardo Checa, Jessica Andrea Descance , Maribel Xiomara Toro, Sandra Lorena Álvarez, Claudia Salazar   +4 more
doaj   +1 more source

Variación genética en el complejo infraespecífico de chayote evaluada mediante sistemas isoenzimáticos

Pesquisa Agropecuária Brasileira, 2012
El objetivo de este trabajo fue estimar el grado de variación genética dentro del complejo infraespecífico de Sechium mediante el uso de sistemas isoenzimáticos. Se analizaron 23 loci codificados por 12 sistemas isoenzimáticos, en geles de almidón, en 10
Carlos Hugo Avendaño-Arrazate, Jorge Cadena-Iñiguez, María Lourdes Arévalo-Galarza, Victor Manuel Cisneros-Solano, Juan Francisco Aguirre-Medina, Esaú del Carmen Moreno-Pérez, Moises Cortés-Cruz, Carlos Roman Castillo-Martínez, Porfirio Ramírez-Vallejo   +8 more
doaj   +1 more source