Cytological Relationship between the Two African Perennial Hexaploid Strains of Echinochloa stagnina (Retz.) Beauv
1978 Volume 43 Issue 1 Pages 101-105
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1978 Volume 43 Issue 1 Pages 101-105
Two African perennial hexaploids (n=27) of Echinochloa were collected. One from Gao, Mali was stoloniferous. Another one from Banket District of Rhodesia was a cormous perennial.
These two hexaploids have been treated as E. stagnina by taxonomists, but cytological evidence of their F1 hybrid indicated that they have diverged to such an extent that meiosis conjugation is considerably impaired in the hybrid between them.
E. stagnina should be considered as a complex of several species because some Echinochloa specimens which are different from each other in morphological characteristics, chromosome number and genome constitution have been classified as this taxon.
