Three-line hybridization is the cross-breeding of three varieties. Among these three breeds, crossbreeding was continued for several generations with one variety as the main variety. The main purpose is to form a "multi-series" breed of pigeons.
Improvement refers to removing the individual shortcomings of things and adapting them to higher requirements. To improve the crossbreeding, the best pigeons in different breeds are crossed to obtain better offspring. For example, the improved breed is used as the female parent, the improved breed is used as the male parent for crossbreeding, and the hybrids are then used to produce hybrids. The hybrids are used as male parents from generation to generation. After 3 generations to 5 generations, they are utilized. The advantages of improved varieties, while retaining the advantages of improved varieties, and then selecting and discarding these sub-pigeons, can obtain better new varieties.
Breeding Crossbreeding is a method of using different varieties for crossing and breeding new varieties. It is divided into two different forms of hybridization: one is the simple breeding of hybrids, and the other is the complex breeding of hybrids. Simple bred crosses use two breeds for crosses; complex bred crosses use more than two breeds for crosses. The purpose of bred crossbreeding is to rapidly and stably hybridize to the superior traits of offspring through directed cultivation.
Economic hybridization is the use of two varieties of hybrids, using hybrid heterosis of the first generation of hybrids to obtain high-yielding and viable offspring. The traits of the economically hybrid first generation pigeons are easily separable and cannot be left as breeding pigeons.
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