谷子的原种来源有两个方面:一是由原种经过一次繁殖的种子;二是经过二圃制的程序生产的、符合国家规定的原种标准的种子。二圃制生产原种,采用的是改良混合选择法,它有三个环节:即单穗选择、穗行比较混合繁殖。本文就其理论依据、主要技术、实践结果三个方面加以论述。理论依据一、谷子是自花授粉作物作物的传粉方式,直接牵涉到原种生产的体制和隔离问题。谷子究竟是自交作物,还是常异交作物?看法尚有分歧。根据我们的育种实践和掌握的资料表明,谷子是自花 There are two sources of the original seed of millet: one is the seed that has once been propagated from the original seed; the other is the seed that has passed the procedure of No.2 Nursery and meets the original seed standard stipulated by the state. Two nursery production of the original species, using a modified hybrid selection method, which has three links: a single spike selection, ear row mixed breeding. This article discusses its theoretical basis, main techniques and practical results. Theoretical basis A millet is pollination of self-pollination crop crops, directly involved in the production of the original species system and isolation issues. Whether the millet is self-fertilized or is often out-crossed? There are still differences of opinion. According to our breeding practice and the information we have learned, millet is self-supporting