It is very important for rex rabbits to have a good selection

The first option is to choose a species:

First, the breeding program, who is assigned to whom. According to ancestry, age, coat quality, physical type and other qualities, formulate matching scheme. All the rabbits in the rabbit group were divided into three six nines, etc., and the first-class rabbits were bred as the core breeding target, which was the main target for seed retention from their offspring, that is, before the seed selection, the animals were systematically selected. Excellent genes are reorganized and consciously produce outstanding individuals;

Second, stage selection. Selection is a meticulous job, not a success. It is necessary to observe and test constantly from birth to mating and even to third-generation offspring, and select those outstanding individuals in the competition. At least four stages are required: first, weaning, second and third months of age, third, initial allocation, fourth, and subsequent generations. Each stage has different selection content and focus. During the weaning period, the weight of weaned litters, the number of weaned pigs, the weaning survival rate, and weaning uniformity should be the key points; at the age of three months, weight, feed consumption, and coat quality should be the focus; The coat's quality, sexual characteristics and disease resistance are the key points; the ability to nurture future generations will be the focus of future generations.

Third, choose poor. There is no choice without elimination. Both exist at the same time. Choosing the difference is also the selected proportional relationship. In a group, the greater the difference in selection, the greater the intensity of selection and the selection of the best individuals. For example, a group of 300, 3 months of average weight of 2 kilograms, if all as a species, the group's weight is this. If half of the species are selected for breeding, that is, if 150 species are selected, then the average body weight of 3 months of the selected population may be 2,25 kg. If 25% of them are used for breeding and 75 species are selected, it is possible that The average 3-month-old weight of the selected group is 2,35 kg. If 10% of them are used for breeding, that is, 30 species are selected, and the 3-month-old body weight of the group that may be selected is 2,40 kg. Of these, 5% were selected and only 15 were selected for breeding. The average weight of the 15 rabbits that could be selected reached 2, 5 kg. This example is very simple. It is excellent and excellent. The more you choose, the better. It's never good to stay good or not.

Fourth, compare with the conditions. Select taboos one-sidedness and unfair competition. For example, if you select one of the two 3-month-old female rabbits and just look at your weight, A is 2, 4 kg and B is 2, 5 kg. You may quickly conclude that B was selected. However, this may not be the ideal choice. You should check the records: A and B are several siblings at the time of weaning and how much they weigh; if they are the same, this explains the problem. If we have 5 weaned siblings and weaning weights of 0 and 6 kg, and B has 8 and weaning weight is 0 and 4 kg, then the choice of three months of age is not fair just to look at the weight. For another example, one of two females of AB was also selected at the time of weaning of the postpartum rabbit. It is not only necessary to look at the number of litters, the milking power, the weaning survival rate of weaning and the weaning weight, but more importantly, when mating in advance, the breeding should be carried out programmatically, using the same male rabbit, and this male rabbit There was no blood relationship with both females.

Fifth, enough quantity. For example, comparing five species of male rabbits, just looking at their weight, size, and coat can not fully explain the problem, allowing them to breed at the same time. There are enough female rabbits. The results of only one child can not explain the problem, the more the number of fetuses, the greater the accuracy of selection.

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