摘要
本文对棉属(Gossypium)二倍体野生种5个组的代表种即 B_1(G.anomalum),C_1(G.sturtianum),E_1(G.stocksii),F(G.longicalyx)和 G(G.bickii)的核型进行了分析。提出分布于非洲南北的 B 组野生种为最原始的类型,以此为中心呈辐射状分化和迁移,形成了现今的特殊的地理分布。
The karyotypes of five genomic groups in type species of Gossyplum;B_1(G.anomalum)_5 C_1(G.sturtianum),E_1(G.stocksii),F(G.longicalyx),and G(G.bickii)were analyed in this paper.Coupled with the studies of the karyotypes A_1(G.herbaceum)and D_5(G.raimon- dii)in the former report,and in view of the interspecific crosses,DNA content,the electrop- horetic analysis of seed proteins and morphological and geographical classification,the authors infer that the B genome distributed across Africa from North to South may be the most pri- mitive type,with the differentiation and migration of the B genome as a radiating center,it forms the specific distribution at present time.
关键词
二倍体野生种
棉属
核型
进化
Gossypium
Diploid wild species
Karyotype
Evolution
