Articles tagged with Inbreeding
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A new study reveals how beluga whales in Alaska's Bristol Bay survive through a surprising strategy: they mate with multiple partners over several years. This polygynandrous system helps maintain genetic diversity despite the population's small size and isolation.
A study by Northwestern University scientists found that incomplete historical records have led to low genetic diversity and population decline among corpse flowers. The lack of standardized data makes it challenging for conservationists to make informed decisions about breeding, resulting in a high percentage of cloned plants.
A recent study analyzed genomic variation distribution, genetic diversity, and heterotic group types in modern maize inbred lines. The research found new potential heterotic groups and identified elite breeding loci for traits like yield, plant architecture, and stress resistance.
A new study found that Kirtland's warblers have exceptionally long runs of homozygosity (ROH) indicating very recent inbreeding, while also having a high frequency of potentially damaging genetic variants. This suggests that continued management is necessary to ensure the species' survival.
Northern elephant seals nearly went extinct due to overhunting but have since recovered to around 225,000 individuals. The recent study found the species' genetic diversity was reduced during this period, which may impair their ability to cope with future environmental changes.
Research finds high levels of inbreeding in Lassen and Sierra Nevada red fox populations, highlighting genetic rescue as a viable option for restoration. The study also reveals the potential for reconnection with neighboring populations to increase adaptive potential.
A recent FAU study reveals that mesophotic corals can replenish declining shallow reef populations with strong genetic connectivity between shallow and deep zones. The research suggests that deeper corals could be a key source of genetic diversity for shallow reefs, providing valuable opportunities for recovery and restoration efforts.
A new genetic test has identified a mutation causing progressive retinal atrophy (PRA) in English Shepherd Dogs, allowing breeders to eliminate the disease from their population. The test is available for purchase and will help prevent the disease from being passed on to puppies.
Researchers combined DNA markers from two genotyping systems to improve genomic predictions and GWAS for 24 fruit traits. The results showed increased accuracy and detection power when using combined datasets, suggesting benefits to leveraging historical data.
A genomic analysis of last surviving woolly mammoths on Wrangel Island reveals signs of inbreeding and low genetic diversity, contradicting the idea that they were doomed to extinction. The research suggests that a random event likely led to their demise.
Researchers observed a rare instance of lemur predation by a fosa in the Betampona Strict Nature Reserve. The impact of this predation, combined with low reproductive rates and genetic isolation, poses significant threats to the survival of critically endangered lemurs.
The study revealed three genetically distinct populations of rusty-patched bumblebees, highlighting the need for tailored conservation efforts. The analysis showed low colony abundance and high rates of inbreeding, threatening the long-term viability of the species.
A study by Florida Atlantic University researchers found that severe hurricanes can increase the recovery of coral reef sponges by boosting the influx of juveniles and promoting gene flow. Genetic analyses revealed that populations of clonal marine species may benefit from increased frequency and magnitude of hurricanes to maintain gen...
A new study from Uppsala University found that Stone Age hunter-gatherer communities in Western Europe deliberately formed distinct families to avoid inbreeding and maintain genetic diversity. The research analyzed the genomes of several individuals buried at iconic sites in France, dating back to around 6,700 years ago.
Researchers at the University of Zurich have discovered a signal that activates the female gamete in thale cress, a model plant species. This breakthrough could lead to the development of apomixis, a form of asexual reproduction that would allow crop plants to be propagated more easily and efficiently.
Despite high levels of inbreeding, the Svalbard reindeer population has developed adaptations to thrive in extreme Arctic conditions. Researchers found that inbreeding may help eliminate harmful mutations, leading to a viable and genetically resilient population.
Scientists discovered that climate shifts during the last 400,000 years influenced the frequency of Neanderthal-Denisovan interbreeding. The researchers found that temperature changes triggered habitat overlaps, leading to increased contact between the two species.
Researchers found that giraffes on either side of the rift have not interbred for over 1,000 years, with females showing no signs of migration. The study suggests that Masai giraffes are more endangered than previously thought, requiring separate but coordinated conservation efforts.
Researchers at York University found more pathogens and parasites in urban bee populations, leading to inbreeding and reduced genetic diversity. Conservation efforts focused on green spaces and habitat connectors can help mitigate these effects.
Research found that inbreeding is a major factor contributing to the decline of the endangered Southern Resident killer whale population. The study, published in Nature Ecology and Evolution, indicates that inbred individuals have lower survival rates and birth rates compared to those with lower levels of inbreeding.
A team of scientists found a 16-year-old European hedgehog in Denmark, exceeding the previous record by seven years. The discovery contradicts previous studies suggesting that inbreeding reduces lifespan. The study's results provide valuable insights into the basic life history of hedgehogs and may improve conservation efforts.
Researchers sequenced the genomes of two endangered sharks, finding low genetic diversity and signs of inbreeding in great hammerheads. In contrast, shortfin makos showed higher genetic diversity and limited inbreeding, offering a glimmer of hope for conservation efforts.
Researchers developed disease-resistant maize genotypes for smallholder farmers, increasing safe yields and reducing aflatoxin contamination. The findings offer a promising strategy to protect food security in Sub-Saharan Africa.
The Devils Hole pupfish has the lowest genetic diversity among known vertebrates, with 58% of its genomes identical. This lack of diversity may doom the species to extinction as climate change and human impacts increase.
A new study found nearly half of Florida panther mutations originated from Texas and Central American pumas, bringing both good and bad genetic material. Researchers emphasize the need to monitor genetic health due to potential risks, especially with small population sizes. Genetic screening for future introductions may be necessary.
A recent letter to Science warns that a drastic reduction of Swedish wolf population could exacerbate inbreeding and genetic erosion. The authors advocate for increasing population size and securing connectivity with neighboring populations to improve conservation.
Researchers analyzed 48 years of data on wild baboons' family trees and mate choices to understand how they avoid inbreeding. The study found that baboons generally steer clear of mates that are half-siblings or closer, but show less discrimination with their father's side of the family.
Researchers at Uppsala University studied the genomic effects of inbreeding on Scandinavian wolves, finding that 10-25% of original genetic variation was lost after five generations. The study revealed a surprisingly large number of genetic variants disappeared, highlighting the risks of inbreeding in endangered species.
A recent study published in Canine Medicine and Genetics reveals that most dog breeds are highly inbred, with an average inbreeding rate of 25% or sharing the same genetic material with a full sibling. This high level of inbreeding contributes to increased disease and healthcare costs throughout a breed's lifespan.
Researchers sequenced genomes of 90 Eastern massasauga rattlesnakes and found that potentially damaging gene mutations were less abundant. This suggests that inbreeding might not be as detrimental as theory predicts, as beneficial mutations can easily purge bad ones. The study's findings could influence management decisions.
Despite 10,000 years of inbreeding, the kākāpō genome sequencing reveals that the species has lost potentially deleterious mutations and now carries fewer harmful mutations than extinct mainland populations. This finding suggests that natural selection may have facilitated genetic purging in small populations.
Researchers have helped fill gaps in the rhino evolutionary family tree by analyzing genomes of living and extinct species, finding that African and Eurasian lineages separated 16 million years ago and that low genetic diversity is a natural state for rhinoceroses, not a consequence of recent population declines
A new study of the California condor genome found a surprising amount of genetic diversity, indicating that the species was once more abundant. The researchers believe this diversity will aid in future conservation efforts and potentially mitigate the effects of previous inbreeding.
A new analysis of the California condor's complete genome reveals a wealth of genetic diversity, which can aid in its long-term survival. The study found that the species' historical abundance contributed to its high genetic diversity, making it less susceptible to inbreeding and disease.
Researchers at Stockholm University found little evidence that animals avoid mating with relatives, contradicting long-held assumptions. This study synthesizes 139 experimental studies across 88 species and has implications for conservation breeding programs aimed at maintaining genetic diversity.
Researchers sequenced genomes from 21 specimens to investigate the genetic health of Sumatran rhinoceros. Low inbreeding levels and high genetic diversity were found in present-day populations, but potentially harmful mutations were detected, posing a risk to the species' survival.
A recent study by researchers at Swansea University found that inbreeding can reduce cooperation in banded mongooses. Inbred pups that receive extensive care from adults have similar survival rates to outbred pups, but eventually become bad carers when they are older.
Researchers studied 3100 house sparrows from eight islands in northern Norway to examine the effects of inbreeding. The study found that inbred birds had shorter lives and reproduced poorly, with less genetic variation across their genomes.
Researchers found that long-tailed tits use distinctive calls to recognize close relatives and avoid inbreeding. The study reveals a potential mechanism for these birds to minimize the risk of reducing reproductive success.
A study reveals that long-tailed tits employ learned vocal cues to distinguish between close kin and non-kin, thereby avoiding incest. This unique strategy helps the birds maintain genetic diversity and is crucial for their reproductive success.
The use of genomic data is crucial in combating extinction, as 44.3% of species are currently in decline. Conservation genomics can help identify bad mutations that can weaken populations and inform breeding strategies.
A new study finds that female chimpanzees with high-ranking mothers are more likely to stay in their birth group, despite the risks of inbreeding. The benefits of having a powerful mom, including access to prime foraging spots and social clout, may outweigh the costs of staying.
A new study has confirmed a direct link between inbreeding and facial deformities in the Habsburg dynasty. The research found that the 'Habsburg jaw', a distinct chin characteristic, was more prevalent among family members with higher degrees of relatedness.
Researchers suggest that small Neanderthal populations were vulnerable to extinction due to inbreeding and demographic fluctuations. Population modeling revealed that even moderate levels of inbreeding and Allee effects could lead to extinction across various population sizes.
An international study has investigated the extinction of two New Zealand songbirds, revealing that habitat loss and introduced mammalian predators were key factors. The research, published in Biology Letters, used ancient DNA to reconstruct the birds' population history, indicating a rapid decline prior to their extinction.
Research reveals inbreeding depression significantly impacts Helmeted Honeyeater population, with the most inbred birds producing fewer offspring. Gene pool mixing is proposed as a solution to reduce harm caused by inbreeding.
A new genomics study explores the genetic signatures of a pair of wolves isolated on Isle Royale, revealing the impact of inbreeding on the population's health. The research found that close inbreeding leads to genetic anomalies, which are likely driving the wolf population crash over the past decade.
A new genetic analysis reveals that two male whales fathered over half of the calves born since 1990, indicating inbreeding in the Southern Resident killer whale population. The limited breeding number reduces the population's resilience to change, potentially compromising individual animals' survival.
The Dahl's Toad-headed Turtle is threatened due to small and fragmented populations and high levels of inbreeding. A genetic rescue strategy is recommended to save the species, including moving turtles between subpopulations and restoring its habitat.
A genomic study of Scandinavian wolves has found extensive inbreeding, with some individuals having entire chromosomes without genetic variation. The study also revealed that immigrant wolves were partly inbred, contradicting the assumption of unrelated founders.
Researchers found that prehistoric humans deliberately sought partners beyond immediate family to avoid inbreeding. This suggests they developed complex mating systems, possibly foreshadowing modern marriage ceremonies, which may have contributed to their success.
Research suggests that prehistoric humans recognized the dangers of inbreeding at least 34,000 years ago and developed sophisticated social networks to avoid it. The study analyzed genetic information from remains of anatomically modern humans and found evidence of deliberate mate selection beyond immediate family members.
Research from the University of East Anglia found that inbred birds have shorter lifespans due to telomere shortening. The study analyzed DNA samples from a population of Seychelles warblers, finding that inbreeding affects not only the young but also their mothers' ability to provide for them.
A long-term study on Scottish island red deer reveals that inbred hinds raise significantly fewer offspring to adulthood due to increased mortality rates. Inbred males also sire fewer offspring, highlighting the adverse effects of inbreeding on adult wild animals.
A study by Zoological Society of London reveals that bachelor males in small, threatened populations can maintain genetic diversity and reduce inbreeding. These 'floaters' have a significant impact on population size and sex ratio, helping to increase breeding birds and influence the survival of the species.
Researchers found that male and female banded mongooses discriminate between relatives and non-relatives to avoid inbreeding, with males directing mating effort towards less closely related females. The study suggests a previously unknown breeding system where both sexes avoid inbreeding when mating within their extended family group.
A new study published in Nature reveals that sexual selection improves population health by removing harmful genetic mutations, allowing species to flourish and avoid extinction. This finding provides direct support for the idea that sex persists as a dominant mode of reproduction due to its role in maintaining genetic diversity.
Research suggests that inbreeding has genetically benefited mountain gorillas by eliminating deleterious variations, contributing to their survival. This discovery challenges the assumption that low genetic diversity makes these animals more susceptible to environmental changes and diseases.
A comprehensive genetic survey of captive giant pandas reveals high levels of diversity and low inbreeding rates, indicating a healthy population. The study's findings suggest that captive breeding centers can successfully release pandas into the wild with proper selection criteria.
Scientists from Michigan Technological University found that inbred wolves on Isle Royale National Park are struggling, leading to a significant drop in wolf predation rates and a doubling of the moose population. The researchers attribute this decline to genetic inbreeding caused by the introduction of a single immigrant wolf in 1997.