STM Article Repository

Crop breeding is the art and science of improving important agricultural plants for the benefit of humankind. Crop breeders work to make our food, fiber, forage, and industrial crops more productive and nutritious. First, it was determined how breeding practices and expanding germplasm complement one another. In particular, transformation gene breeding was able to use the superfine genes of living things on the planet and produce germplasm resources that could not be obtained through conventional breeding. The source of utilization germplasm expanded from only using variation in a variety to among families, which had an even wider scope. Secondly contradiction and its movement between ecological and yield ability character, among yield ability characters or ecological characters exist all; this verified that ex- plaining all of phenomenon was “net system of character composition of yield performance”, “theoretical genetics and breeding science of crops” theory system setting up by author. Thirdly new concepts, closed breeding and open breeding were put forward on basis of relationship of un- ity of opposition among above characters (genes) and supplying way of necessary energy in cha- racter expressThe idea of closed and open breeding was a generalization of the key distinction for various breeding methods, as well as the theoretical foundation for an accurate assessment of these. It forced people to reject myths based on the premise that relying on closed breeding could produce greater yield varieties, and it forced people to abandon the notion that tradition only had variation and the creation of new varieties. It was decided by openness to sexual cross-breeding, etc., that it would always maintain a footing in an unbeatable position, develop continuously, and be replaced by no other breeding method.