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美国棉区广阔,生态环境各异,品种类型丰富,与棉花育种及种子经营有关的单位亦多,据报道1983—1986年初美国发放棉种的单位就有32个,推广的棉花材料116份次,其中16份次是连续两年或三年重复发放的,所以实际份数是100,其中品种74个(包括1个海岛棉品种),种质系26个。一、几个主要系统品种简介美国几个主要系统的品种由以下几个单位提供:南卡罗来纳州珂氏纯系种子公司(主要推广珂字棉)、密西西比州三角洲松滩种子公司(岱字棉)、密西西比州斯通维
The vast cotton fields in the United States have different ecological environments and rich varieties, and many units are involved in cotton breeding and seed management. It is reported that there were 32 units that issued cotton in the United States in 1983-1986 and 116 cotton materials were promoted , Of which 16 were repeated for two or three consecutive years. Therefore, the actual number of shares is 100, of which 74 are varieties (including 1 island cotton) and 26 are germplasm. First, the introduction of several major system varieties Introduction Several varieties of several major systems in the United States provided by the following units: South Carolina Keer purebred seed company (the main promotion of Ke word cotton), Mississippi Delta Songtung seed company (Dai word cotton ), Stoneville, Mississippi