HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Dorrell, D. G. Articles by Whelan, E. D. P. Search for Related Content PubMed Articles by Dorrell, D. G. Articles by Whelan, E. D. P. Agricola Articles by Dorrell, D. G. Articles by Whelan, E. D. P.

Chemical and Morphological Characteristics of Seeds of Some Sunflower Species¹

Six species of wild sunflower (Helianthus), including the diploid annuals, H. annuus L. and H. petiolaris Nutt., the diploid perennials, H. giganteus L. and H. maximiliani Schrad., and the hexaploid perennials H. rigidus L. and H. tuberosus L. which are native to southwestern Manitoba and the north central Great Plains, were analyzed. The latter four species were characterized by small seed which averaged 3.4 g/1000, medium-low oil content, 25.3%, low concentration of palmitic and stearic acids, 4.7 and 1.8%, respectively, and a high concentration of linoleic acid, 81.9%. The remaining species, H. annuus and H. petiolaris, had larger seeds, 7.3 g/1,000 medium oil content, 28.8%, low concentrations of chlorogenic acid, 2.5%, and a high concentration of linoleic acid, 79.6%. This compares with 59.5 g, 44.4, 3.7, and 71.8%, respectively, for the cultivar ‘Saturn’. If wild H. annuus and H. petiolaris are used to transfer desirable agronomic characteristics to cultivated sunflowers, they have the potential of improving oil quality characteristics. Furthermore, they hybridize much more readily with sunflowers than the other species studied.

Key Words: Oil content • Fatty acid composition • Linoleic acid • Chlorogenic acid concentration • Seed weight • H. annuus • H. petiolaris • H. maximiliani • H. giganteus • H. rigidus • H. tuberosus

² Head, Crop Science Section, and research scientist, Agriculture Canada. Research Station, Morden, Manitoba ROG 1J0.

Received for publication May 20, 1978.