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Un perro con pelaje rojizo sorprende a científicos: qué revela el estudio de su genética
El Retriever de Nueva Escocia, conocido también como Toller, es un perro pequeño, ágil y de pelaje rojizo. Su cuerpo compacto y su energía lo hacen ideal para actividades físicas y para estudios científicos.
Esta raza se originó para recuperar aves acuáticas y su temperamento activo la volvió popular en hogares que buscan perros con gran disposición para el ejercicio.
Científicos de Estados Unidos, Australia, Canadá y Suecia analizaron sus características morfológicas y genéticas en un estudio publicado en Scientific Reports.
El Nova Scotia Duck Tolling Retriever muestra un fenotipo característico que combina tamaño reducido y pelaje rojizo, que puede variar hasta el anaranjado y siempre es resistente al agua.
En comparación, otras razas como el Golden Retriever y el Labrador presentan tonos más claros o diferentes.
El estudio identificó una variante genética en el gen RESF1, exclusiva del Toller, asociada a un mayor riesgo de desarrollar enfermedad de Addison y un síndrome autoinmune múltiple en ejemplares jóvenes. Esta variante no se detectó en más de 2.500 perros de otras razas analizadas.
El gen RESF1 cumple un papel importante en el sistema inmunológico. Cuando el perro hereda la variante de ambos padres, la probabilidad de padecer enfermedades autoinmunes tempranas se incrementa de forma significativa.
El 76% de los perros homocigotos para la variante desarrolla la enfermedad en etapas tempranas de la vida. Los investigadores observaron casos en los que la enfermedad no se manifestaba aunque el perro tuviera la variante genética.
A esto lo llamaron “penetrancia incompleta”, lo que indica que factores ambientales o la combinación con otros genes pueden influir en la aparición de la enfermedad.
Entre los perros diagnosticados antes del año de vida, muchos presentaron comorbilidades autoinmunes como conjuntivitis, hepatitis, pancreatitis y otros signos de inflamación sistémica.
El pronóstico para los perros afectados suele ser reservado, con una mediana de supervivencia de 2 años pese al tratamiento adecuado.
El análisis genético se realizó a lo largo de más de una década e incluyó muestras de criadores y propietarios de cinco países.
La variante identificada en RESF1 es un cambio de aminoácido muy conservado entre mamíferos y se comprobó que modifica la función de la proteína.
El estudio utilizó técnicas de secuenciación de genoma completo y análisis de asociación en una cohorte de 24 casos de inicio juvenil y controles sanos.
En los perros afectados, se detectó infiltración de células T en la corteza suprarrenal, lo que confirma el origen autoinmune del proceso.
El test genético para detectar la variante en RESF1 se encuentra disponible y, desde su implementación, no se han reportado nuevos casos de enfermedad de Addison juvenil en perros nacidos de padres testeados.
Esto ha permitido a los criadores seleccionar ejemplares libres de la variante y reducir la incidencia de la enfermedad en la población de Tollers.
La aparición de la enfermedad en perros con la variante RESF1 no depende de combinaciones específicas de genes del complejo mayor de histocompatibilidad (DLA), lo que refuerza la hipótesis de que la penetrancia incompleta puede relacionarse con factores ambientales o epigenéticos.
El Toller destaca como una raza con baja diversidad genética interna, lo que facilita la identificación y seguimiento de variantes hereditarias.
Sin embargo, esto también aumenta la importancia de prácticas de crianza responsables para evitar la propagación de enfermedades monogénicas y cuidar la salud general de la raza.
El trabajo fue llevado adelante por especialistas de la Universidad de California en Davis, la Universidad de Sídney y la Universidad de Uppsala, quienes sumaron experiencia en medicina veterinaria y genética.
Gracias a estos avances, se cuenta con herramientas para la prevención, el diagnóstico temprano y la conservación de la diversidad genética del Retriever de Nueva Escocia.
El Nova Scotia Duck Tolling Retriever no solo brilla por su pelaje rojizo en los lagos canadienses, sino que también se ha convertido en un modelo para entender cómo la genética impacta la salud y cómo la ciencia puede ayudar a preservar razas únicas y funcionales.
Perro Retriever de Nueva Escocia,Retriever,perro,mascota,animal,canino,raza,Nova Scotia,Toller,pelaje
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A shooting at the White House Correspondents’ Dinner is raising fresh questions about security at one of Washington’s highest-profile events, with some attendees describing what they saw as lapses in screening and access control.
While the Secret Service and federal law enforcement moved quickly to secure President Donald Trump and other officials, accounts from attendees and lawmakers have painted a mixed picture of the security posture at the Washington Hilton.
WHITE HOUSE CORRESPONDENTS’ DINNER SHOOTING SHARPENS FOCUS ON TRUMP’S BALLROOM CONSTRUCTION PROPOSAL
Misha Komadovsky, a journalist for Germany’s DW, shared a photo on X of the paper ticket used by attendees to gain access to the event, saying it was «the only thing required» for entry into the Washington Hilton ballroom. «There was no security screening prior to entering the lobby,» he wrote.
ABC News reporter Beatrice Peterson, who wrote on X that she has attended the event for more than a decade, offered a more measured assessment, saying the overall security posture appeared consistent with past years.
She noted that pre-event gatherings tend to be more fluid, while the dinner itself is typically more tightly controlled, and that security — both plainclothes and uniformed — is always present inside and outside the venue.
Peterson described the crowd and security presence as «typical-ish» for a year in which the president attends the dinner, suggesting no obvious deviations from past practice.
However, she said multiple investigations are expected to examine what happened and whether any failures occurred, adding the incident could permanently change how the event is handled going forward.
SECRET SERVICE IN LINE OF FIRE AT WHCA SHOOTING STILL UNPAID DUE TO DEM-LED SHUTDOWN
Security officials hunt for threat as shots fired at correspondents’ dinner. (Jonathan Ernst/Reuters)
Harrison Fields, a former White House principal deputy press secretary, told «FOX & Friends» there were «no checkpoints to get into the hotel,» adding that the gunman could have been «roaming» and observing attendees before the incident.
«There was a VIP reception right off the main ballroom where Cabinet secretaries were, where the president could have been — and there was no security apparatus leading up to that point,» Fields said.
Fields acknowledged that the Secret Service and local law enforcement «took immediate steps to keep us safe,» but said there was «no real buffer» in place, which he noticed as soon as he arrived.
WORLD LEADERS CONDEMN ‘UNACCEPTABLE’ VIOLENCE AFTER ARMED ATTACK DISRUPTS WH CORRESPONDENTS’ DINNER
U.S. Ambassador to the United Nations Michael Waltz and his wife Julia Nesheiwat, former U.S. Homeland Security Advisor, are rushed out of the Washington Hilton on April 25, 2026 in Washington, DC. (Al Drago/Getty Images)
Even as some attendees described the security posture as typical, lawmakers offered a far more critical assessment.
Rep. Mike Lawler, R-N.Y., pointed to what he described as «glaring security issues,» even as he acknowledged that the Secret Service and federal law enforcement «acted swiftly» to secure the ballroom and move President Donald Trump and other officials to safety.
In a post on X, Lawler said there was no photo ID requirement or verified attendee list, which he noted is standard for White House events. He also cited the absence of magnetometers before entry to the ballroom and said multiple pre-event receptions with limited security created potential access points.
Lawler said the building remained open to the public and raised concerns about accountability inside the room, noting there was no clear handle on how many members of Congress were present or where they were seated.
He called for a «complete and thorough after-action» review, focusing on how the gunman moved from his hotel room into what he described as a secure area with multiple firearms.
ARMED MAN SHOT AND KILLED AFTER ‘UNAUTHORIZED ENTRY’ INTO MAR-A-LAGO: SECRET SERVICE
Police and National Guard stand in front of the Washington Hilton after the White House Correspondents Association Dinner was postponed April 25, 2026 in Washington, DC. (Chip Somodevilla/Getty Images)
Sen. John Fetterman, D-Pa., who attended the dinner, also raised concerns about the venue itself. «We were there front and center,» Fetterman said. «That venue wasn’t built to accommodate an event with the line of succession for the U.S. government.»
Similarily, Kari Lake, a Trump ally in attendance, echoed criticism of the security measures. «I was there. Security was terrible at the event,» Lake wrote on X. «It was the easiest event I’ve ever gained access to that the president was at. It was so bad we talked about it at our table before the shots rang out.»
The Washington Hilton has long hosted high-level government events, including gatherings attended by the president, vice president and members of Congress beyond the annual dinner.
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Last week, the First Lady’s Luncheon was held in the same ballroom, where first lady Melania Trump and second lady Usha Vance delivered remarks.
The Secret Service’s familiarity with the venue helped enable a swift response — and is one reason the White House Correspondents’ Dinner has been held there annually since 1968.
white house, homeland security, media, donald trump, politics
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A Wisconsin brewery and taproom known for promising «free beer» when President Donald Trump dies is drawing renewed scrutiny for posting on Facebook «we almost got #freebeerday.»
The Minocqua Brewing Company is owned by Wisconsin Democrat Kirk Bangstad, a former state Assembly candidate who has repeatedly used the brewery’s brand to attack Trump and Republicans. The brewery’s social media lamented Saturday night’s foiled attack at the White House Correspondents’ Dinner.
«Well, we almost got #freebeerday,» the company’s post read, although Fox News could not immediately identify the poster’s tie to the owner. «Either a brother or sister in the Resistance needs to work on their marksmanship or he faked another assassination to get a positive news cycle. We’ll never know.»
IDAHO BAR OWNER FACES DEATH THREATS AFTER VIRAL PROMO OFFERING FREE BEER FOR ASSISTING ICE
The Minocqua Brewing Company is under fire again for its «free beer day» campaign openly anticipating the death of President Donald Trump after a foiled attack at the White House Correspondents’ Dinner on April 25, 2026. (Google Maps)
«Regardless, we stand at the ready to pour free beer the day it happens,» the post concluded.
Bangstad was the Democrat nominee for Wisconsin’s 34th Assembly District in 2020, according to Ballotpedia, but lost the general election.
Minocqua Brewing sells politically themed merchandise, including shirts saying, «I wish it was free beer day,» and pitches its progressive brand that pairs beer with activism and «snarky progressive merch.»
DONALD TRUMP JR. WARNS POLITICAL VIOLENCE IS ‘NOT GOING BOTH WAYS’ AS HE MOURNS CHARLIE KIRK’S DEATH
The Minocqua Brewing Company is under fire again for explosive calls for political violence against President Donald Trump. (Minocqua Brewing Company/Facebook)
Fox News Digital previously reported on the brewery’s «free beer day» vow. In January, Fox News highlighted a Minocqua Brewing message offering «free beer, all day long, the day he dies,» and noted Bangstad’s comment that he would welcome people to celebrate Trump’s «impending death» with one caveat: «no red hats allowed.»
Fox News also identified Bangstad as the founder of the Minocqua Brewing Company super PAC, which targets Trump and Republicans. Also, Bangstad once sued to keep Trump off the Wisconsin ballots before the 2024 presidential election.
The fresh backlash followed Saturday night’s security scare at the WHCA dinner in Washington, where Trump and first lady Melania Trump were evacuated after shots were fired outside the ballroom.
Fox News reached out Sunday to Bangstad, the brewery and the Wisconsin Democratic Party. In a January statement to Fox News, Bangstad welcomed the celebration of the «impending death» of Trump.
PENTAGON CALLS CHARLIE KIRK POSTS ‘DOMESTIC TERRORISM’; DEM WARNS DISCIPLINE IS ‘UN-AMERICAN’
Bangstad and Minocqua Brewing have drawn repeated scrutiny beyond their anti-Trump messaging. Wisconsin Public Radio reported Bangstad was charged last year in a harassment case tied to a dispute with a local newspaper publisher, and Wisconsin newspaper reporting said he later entered a no-contest plea in a disorderly conduct case and was found guilty earlier this month.
JB PRITZKER CONDEMNS POLITICAL VIOLENCE AFTER CHARLIE KIRK’S DEATH, SAYS TRUMP’S RHETORIC ‘OFTEN FOMENTS IT’
Trump-backed House candidate Michael Alfonso called out the normalization of Bangstad’s rhetoric in the state.
«This brewery is owned by a man named Kirk Bangstad, and he’s not just some random crazy guy,» Alfonso posted on X. «Kirk is friends with current Democratic gubernatorial frontrunner Francesca Hong. He previously employed Rebecca Cooke, the Democrat currently running against Derrick Van Orden, and was himself the Democratic nominee against my father-in-law, Sean Duffy, in Wisconsin’s 7th Congressional District—where I am now running for office.»
The Minocqua Brewing Company is under fire again for its ‘free beer day’ campaign openly anticipating the death of President Donald Trump. (Google Earth)
TRUMP RALLY GUNMAN ACTED ALONE, FBI SAYS — BUT QUESTIONS ABOUT MOTIVE PERSIST
Wisconsin Republicans and the Republican National Committee are calling out the ties to Bangstad.
«Wisconsin Democrats are so sick in the head that an attempted murder is funny to them,» RNC spokeswoman Delanie Bomar told Fox News Digital on Sunday morning.
«All Wisconsin Democrats, including Rebecca Cooke, must immediately condemn this disgusting behavior.»
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Fox News also reached out to Cooke’s campaign for comment.
Fox News’ Lindsay Kornick contributed to this story.
democrats elections, fox news, fox news, wisconsin, republicans
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