大家知道,达尔文物种起源理论和生物进化观点认为,世界上现存品种繁多、千差万别的各种生物,都是起源于共同的原始类型,并经过了极其漫长的地质年代,在自然选择和生存斗争过程中,通过生物遗传和变异的特性而逐渐演化来的。同样,现有的栽培植物和饲养动物也都是起源于野生种类,经人工选择和定向培育的结果。并由此创造出符合人们需要(主要是经济性状)的优良品种。从人类的生产发展史来看,由野生动 We all know that Darwinian species origin theory and biological evolution point of view, the world’s existing variety and variety of creatures, all originated in the common primitive type, and after a very long geologic age, in the process of natural selection and survival struggle , Evolved through the characteristics of biological inheritance and variation. Similarly, the existing cultivated plants and breeding animals are also the result of the artificial selection and directional breeding originated in the wild species. And thus create a good variety that meets people’s needs (mainly economic traits). From the history of human production and development, from wild