5 Most Common Inbreeding Problems in Geese

Inbreeding is a real threat to the future and health of any geese flock. Inbreeding in geese occurs when farmers breed geese with closely related genetic traits. Although genetically related parents can produce healthy offspring, inbreeding can lead to many problems in the flock. For instance, inbreeding in geese can hamper genetic diversity, lower fertility rates, and increase mortality rates.

What is Inbreeding in Geese?

Inbreeding in geese is a breeding process whereby parents with closely related genetic traits produce new geese’ offspring. A geese farmer, for instance, may let a geese hen mate with her brother, making the resulting offspring suffer from recessive traits.

While breeding closely related geese can help farmers retain the good traits in the flock, inbreeding can be counterproductive once the bad genes in a particular geese flock pass on to the other generation.

Common Problems Occurring from Inbreeding in Geese

Inbreeding can cause many problems in your flock since it counters the aim of biological mating, leading to DNA shuffling. These are the problems that occur from inbreeding in geese.

Reduced Genetic Diversity

Inbreeding in geese can lower genetic diversity in geese. A healthy geese flock should have a range of various inherited traits within the flock. Genetic diversity in geese is critical for a flock to adapt to rapidly changing environments. By inbreeding your geese, you will lower your flock’s genetic variation by increasing the risk for homozygosity.

Homozygosity is the similarity of genetic traits in organisms, including geese. Therefore, the likelihood of producing goslings with recessive genetic traits is high if you allow inbreeding to reign in your flock. Inbreeding can significantly reduce genetic diversity in small geese flocks, leading to offspring with multiple reproductive-related defects.

Besides lowering genetic diversity in your flock, inbreeding can subject your flock to recessive gene disorders. Closely related geese usually have a copy of similar recessive genes, which increases the possibility of the genetically related geese passing the copy of recessive genes to their offspring.

Lower Fertility Rates

Several scientific studies show that inbreeding can reduce fertility rates in poultry. Offspring of biologically-related geese are subject to low fertility and hatchability rates. The possibility of infertility is high when offspring are from closely related parents, thanks to the increased probability of homozygosity.

Hatch rates in an inbred flock are poor. For instance, a geese hen from a mother laying around 170 eggs annually could lay less than 100 due to consistent inbreeding.

Consequently, the most apparent effects of inbreeding in geese are poor reproductive efficiency, including high mortality rates, slow growth rates, and a high tendency of hereditary abnormalities. Poor fertility rates due to inbreeding don’t only occur in geese, but it is also prevalent in all organisms, including humans, livestock, and reptiles.

Decreased Growth Rates

Inbreeding in geese can lead to severe homozygosity over time, increasing the chances of having many goslings having recessive traits from their genetically-related parents. Many studies show that inbreeding can contribute to reduced growth rates in poultry, including geese.

Inbreeding can also encourage gene mutation, which significantly decreases growth rates. Goslings of genetically-related parents have a slower growth rate than those of genetically unrelated parents. For instance, inbred goslings can take over ten months to grow to adulthood.

Increased Mortality Rates

Inbreeding in geese can result in offspring with many life-threatening physical abnormalities. These abnormalities will not only affect the well-being of the inbred goslings but also lead to increased mortality rates in your flock.

For instance, goslings experiencing stunted growth due to inbreeding tend to die earlier than healthy goslings. A gosling that can’t forage for food in its formative growth stages risks starvation if it has walking problems due to persistent inbreeding.

Lower Overall Fitness

Inbreeding in geese causes high cases of homozygosity. The recessive genetic traits occurring due to inbreeding can make geese’s offspring suffer from poor overall fitness in the long run. Inbreeding causes physical deformities in geese, subjecting them to poor overall fitness.

Research shows that inbred goslings are physically unfit and suffer from growth problems, such as stunted growth.

How to Avoid Inbreeding Problems in Geese

Inbreeding in geese can be fatal for every geese flock, regardless of size. Inbreeding in geese has many problems, including reduced fertility rates, decreased growth rates, poo genetic diversity, and poor overall growth. Despite these problems of inbreeding in geese, farmers can put in measures to ensure their flocks don’t suffer the adverse effects of inbreeding. Here are some excellent ways to prevent inbreeding in geese.

  • Introduce some new mates– your geese will be mating consistently, provided they live together in the same flock. That would mean that existing birds will mate regardless of their genetic background, resulting in inbreeding in the long run. You can introduce new mates to the existing flock members during the mating season. The new mates won’t have any genetic resemblance with the members of your flock. Consequently, the resulting offspring will have different genetic traits from their parents.
  • Stick to the proper gander-to-hen ratio– Severe inbreeding can result from a gander mating repeatedly with a hen, primarily if it is genetically related to the hen. The trend occurs when you have more males than hens. Balancing the number of ganders in your flock with that of the hens can help avoid severe inbreeding in your flock. For instance, ensure each gander has around four hens before the mating season. The good thing about geese is that they will always form mating pairs before mating. Thus, every gander will have females when you balance the gander-to-hens ratio.
  • Keep the genetically-related parents away from each other– when your geese mate and produce offspring for the first time, the offspring will have similar recessive genetic traits, so the risk of inbreeding will be high in the offspring. You can avoid inbreeding by keeping the genetically-related mates from each other to prevent incidents of inbreeding in your flock.
  • Try culling– Culling is an act of selective breeding whereby you choose to retain members with the most desirable traits in your flock. You can avoid inbreeding in your flock by ensuring that only members with desirable genetic traits mate with each other, consequently producing healthy offspring.


Inbreeding in geese can be problematic for experienced and beginner geese farmers. The adverse effects of inbreeding can spell doom to your future geese flock. It helps geese farmers to avoid the possible effects of inbreeding in their flock to safeguard the health and productivity of their future geese generations.

avatar James
Hey, I'm James, a hardworking homesteader for more than 30 years. I enjoy the feeling of accomplishment that comes from tending my flock. I've raised chickens and ducks for eggs and meat for many years. I also have experience with other poultry too. Learn more

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