Related mating or inbreeding rabbits when breeding animals performs two completely opposite functions. Practice has shown that the reproduction of genetically close animals leads to the degeneration of the breed. The result is that individuals grow worse, develop, gain weight, get sick more. But when breeding new-bred varieties, such incest is often the only way that makes it possible to consolidate useful qualities and properties.
What is rabbit inbreeding?
The combination of male and female germ cells of individuals with a close degree of kinship is called inbreeding. Such a crossing of rabbits weakens the stimulation of the development of the embryo. The offspring grows slowly, is ill, cannot reproduce normally in the future.
In the worst case scenario, ugly, unviable, and even dead rabbits are born. Adverse effects are manifested through one or several generations; therefore, such pairing is used extremely rarely.
On the other hand, breeding farms that are striving to improve and develop new breed lines in rabbits, resort to this method of selection.
On industrial farms, mating of this type is allowed only in the absence of new male rabbits. It is recommended to update the population of producers every 3-4 years, and inside industrial rabbit farms it is better to exchange males on a regular basis. Read more about this in the article "On the breeding rabbits."
How genetic information is transmitted from generation to generation
The properties and characteristics of individual animals determine the genotype that constitutes the dominant and recessive genes. With their heterozygous combinations, the former suppress the latter, manifesting hereditarily programmed characters in rabbits.
Genetic homogeneity is characterized by the fact that the information presented does not change, persisting through generations. More often this uniformity is a consequence of inbreeding.
Homozygosity reinforces the negative or positive qualities that are transmitted from one generation to another. With a favorable set of circumstances, this phenomenon is characterized positively. Useful qualities in rabbits remain, for example, fertility, resistance to adverse external factors.
Negative phenomena are soreness, poor vitality. Mortality with such mutations reaches 8%. Thus, properties, positive or negative signs are determined by the interaction of specific genes.
Homozygosity in vivo
Inside a rabbit herd in natural habitat, the mating partners are randomly selected, so a certain number of combinations of the same genes appear in wild communities.
At the same time, animals retain their viability only with positive properties, since such qualities are determined by natural selection. If rabbits with low milkiness, undeveloped maternal qualities predominate inside the herd, then such a community is doomed to extinction.
Even a strong homogeneous set with useful traits is not always a positive phenomenon, since such rabbits are characterized by genetic inertness. Under changing environmental conditions, these animals can not quickly adapt. Animals do not fit the strict requirements of the wild environment and eventually die out.
Possible variants of related mixes in rabbit breeding
Inbreeding means close mating between mother and son, father and daughter, brother and sister. Such sexual interaction in rabbit breeding is indicated by a combination of Roman numerals (I-II, II-I, II-II).
Further cousins include cousins (II-III, III-II), uncle and niece (III-III). It is known that even distant kinship of the common ancestor type of mother and father (IV-V, V-V, IV-VI) directly affects the quality of offspring.
Due to the desire of the body of the rabbit to reduce the effects of the identity of the genes inside the fertilized cell, there is a loss of certain qualities and properties. At the same time, in different circumstances, desirable and undesirable characteristics appear. To consolidate any useful properties within the breeding farms, individuals with pronounced features are chosen.
Due to the high fertility of rabbits, frequent okolov for these animals are possible communication grandfather, granddaughter, grandmother, grandson, great-grandfather, great-granddaughter, great-grandmother, great-grandson (I-III, III-I, I-IV, IV-I). Depending on the number of common ancestors, inbreeding can be simple and complex.
Factors weakening the negative effect of incest
The greatest negative consequences from kinship mixing are possible in cases where rabbits that mate are characterized by poor health, an undeveloped body, reduced viability, grow and develop under the same conditions.
On the other hand, the external environment can vary greatly, ceasing to be optimal for carriers of specific genes. Under such conditions, ill-adapted individuals are doomed to extinction. Survival will be the most adaptive animals that become the basis of the species in the future.
Thus, it is possible to reduce the negative effects of inbreeding in rabbits by creating different rearing conditions for females and kinship males.
These measures contribute to the formation of dissimilar male and female germ cells. As a result, the offspring of such a litter becomes more viable.
When kept in the pits, mating of relatives is inevitable
In nature, the principle of natural selection works. Weak low-active individuals lose the struggle for survival. Such wild rabbits become easy prey for predators, are not allowed to breed. In the competition for the female, they are inferior to stronger rivals, who often even castrate the rival with sharp teeth.
In group breeding of rabbits in the pits there is also competition, but inbreeding in such conditions is almost impossible to prevent. In order to minimize the negative effects of kin matings, it is required to plant new males into the herd about once every six months.
It is important to choose active, strong individuals who will not be offended. When the herd population reaches 200, the probability of kinship inbreeding is significantly reduced. With constant breeding work, rejection of defective and sick animals disastrous consequences can be avoided.
How to produce inbreeding in small farms
It is not recommended to cross related pairs by yourself. There are situations when females are already entering the hunt, behaving restlessly, and rabbits that would meet the requirements of "fresh blood" cannot be found. It is necessary to use the genetic material of those rabbit males that are on the farm.
But it is important to reduce the risks of possible negative effects of inbreeding. This requires taking the following measures:
- select active healthy individuals with pronounced breed characteristics;
- maximally reduce the degree of kinship of couples;
- reject rabbits with developmental defects, breed traits on an ongoing basis;
- offspring obtained as a result of inbreeding, it is desirable to fatten for slaughter or send away from the place of birth;
- The best females from the litter can be left for further crossing with breeding rabbits brought from afar.
Strictly adhering to such rules, it is possible to reduce the negative manifestations of kin to the minimum.
Possible related rabbit crossing lines
The consequences of the incest of rabbits can be different not only for individual individuals, but also for groups of the entire species of animals. As a result, the gene may change, resulting in deformities, disease, or death. Only in rare cases, due to gene mutation, does the breed characteristics and characteristics of animals improve.
Let's see if it is possible to pair rabbits with relatives of varying degrees of kinship. For example, we cross the nearest blood lines father-daughter (II-I), brother-sister (II-II), mother-son (I-II), and also cousins between themselves (II-III, III-II) , uncle with niece (iii-iii). As a result of the action of the natural defenses of the body, the beneficial or undesirable properties and characteristics of animals are lost. Such a process cannot be controlled; therefore, it is better to abandon the mating of close relatives.
In order to reinforce the desired traits, for crossing, individuals need to be selected that have distinctly pronounced qualities. Special attention should be paid to the pedigree of the parents. More information about this can be found in the article "All the most important about the pairing of rabbits."
Is it possible to pair rabbits born at the same time
The case of brothers and sisters from the same litter is categorically not recommended, since in such cases the offspring is unviable. Rabbits are characterized by weak immunity, susceptibility to various diseases. Due to the low resistance to adverse external effects, animals often die.
To prevent the undesirable effects of mating mating, it is important to take preventive measures. Already a month, you can determine the sex of rabbits, and at three months of age, animals of different sexes should be seated. This will be a good prevention of uncontrolled coatings that harm the health of young animals and lead to the degeneration of the breed.
It is recommended to grow several lines of rabbits inside one nursery. With such a farm structure, the best properties of some animals are complemented by others, and heredity is enriched. Such a phenomenon that combines different lines within the same breed is called a cross. Offspring resulting from the cross can be a great start to a new line of rabbits. Inbreeding can only be used with strict observance of all the precautions mentioned above.
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