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Variations among heads, plants, and ecotypes of wild safflower

Published online by Cambridge University Press:  27 March 2009

M. Kheradnam  and
A. Bassiri
M. Kheradnam
Affiliation:
Department of Agronomy, College of Agriculture, Pahlavi University, Shiraz, Iran
A. Bassiri
Affiliation:
Department of Agronomy, College of Agriculture, Pahlavi University, Shiraz, Iran
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Summary

Seeds from individual heads of wild safflower (Carihamus oxyacantha Bieb.) plants collected from five locations were used in this study. Locations were situated on a roughly east-west transect passing through Shiraz, Iran. The western locations were cooler with higher annual rainfall than the eastern sites. Wild safflower plants of different locations produced about an average of 150 heads per plant, but only 60% of them contained seeds. Frequency distributions constructed for number of seeds per head, germination percentage, and seedling length showed trends of change in the skewness of the distribution for the latter two characteristics parallel to the environmental selective pressure, i.e. the skewness was towards the left for eastern locations but it gradually moved to the right for western ones. Striking amounts of polymorphism were also observed for these characters. A very high proportion of total variance was concerned with differences between heads of the same plant for number of seeds, germination ercentage, and seedling length. Very little variability was found among plants of the same ecotype.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 91 , Issue 1 , August 1978 , pp. 223 - 228
Copyright
Copyright © Cambridge University Press 1978

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