Skip Navigation

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by THOMPSON, P. A.
Right arrow Search for Related Content
PubMed
Right arrow Articles by THOMPSON, P. A.
Agricola
Right arrow Articles by THOMPSON, P. A.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Annals of Botany 37: 413-421, 1973
© 1973 Annals of Botany Company

RESEARCH-ARTICLE

The effects of geographical dispersal by man on the evolution of physiological races of the Corncockle(Agrostemma githago L.)

P. A. THOMPSON

Jodrell Laboratory, Royal Botanic Gardens Kew, Richmond, Surrey

Received: 31 July 1972   

Comparisons were made between populations of Agrostemma githago growing amongst a variety of crops and collected in different parts of Europe to examine the effects of geographical location and crop plant associations on selective adaptation of the species.

Populations varied from one another in their responses to photoperiod, their season of maturity, the partitioning of resources between leaves, stems, and flowers, and in characters such as floriferousness, mean seed weight, and seed production per plant. Analogies drawn between these characters and horticultural qualities of crop plants such as earliness, leafiness, or seed production suggest that it is possible that variations differentiating strains of crop plants may be present prior to their introduction to deliberate cultivation as a result of their occurrence in different locations. This implies that early cultivators of secondary crop plants in particular might have been able to take advantage of pre-existing diversity to extend cropping seasons, or to make use of special characters without need for deliberate selection or forethought.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.