远缘杂交的含义是指异种生物的杂交,也包括异属、异科等生物之间的杂交。此外,有时还把同一种内而原产地相距很远的类型之间进行的杂交称作地理上的远缘杂交。 在农业上利用远缘杂交已有很久的历史。例如,用马与驴杂交产生杂种骡,在我国已有4000年的历史了,藏族地区长期以来就 The meaning of distant hybridization refers to the hybridization of heterogeneous organisms, but also including hybrids between heterosexual and nonspecific organisms. In addition, hybridization between the same types of species within and of origin is sometimes referred to as geographically distant hybridization. It has been a long history of using distant crosses in agriculture. For example, hybrid mules are used to crossbreed horses and donkeys, which has been in our country for 4,000 years. The Tibetan areas have long been