Crop Science Grow Your Career with CSSA
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published in Crop Sci 21:956-960 (1981)
© 1981 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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 Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Dilday, R. H.
Right arrow Articles by Shaver, T. N.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Dilday, R. H.
Right arrow Articles by Shaver, T. N.
Agricola
Right arrow Articles by Dilday, R. H.
Right arrow Articles by Shaver, T. N.

Seasonal Variation in Flowerbud Gossypol Content in Cotton1

R. H. Dilday and T. N. Shaver2

Flowerbud gossypol content has been associated with a degree of host plant resistance in cotton (Gossypium hirsutum L.), but efforts to increase and stabilize genetic levels have been hindered by an apparent seasonal variation in gossypol content, A 4-year study (1974 to 1977) of two lines having flowerbuds with high levels of gossypol and two cultivars with normal levels of gossypol revealed a significant change in gossypol contents both within and between seasons. The gossypol contents in 1975 were significantly greater than those in 1974 and 1977 for the two lines having flowerbuds with high levels of gossypol. Also, a significant withinseason variation in gossypol contents occurred among all four genotypes that were tested. The coefficient of correlation comparing gossypol contents of the two lines having flowerbuds with high gossypol levels and of the two cultivars were 0.82 and 0.79, respectively. Whereas, the coefficient of correlation comparing the gossypol contents of the cultivars with the high gossypol lines were all less than 0.55. These data show that comparisons of flowerbud gossypol levels within a season should be based on seasonal averages or should be made as close to the same date as possible. There should not be more than a 7-day interval between dates if direct comparisons are to be made among entries within a single season.

Key Words: Insect resistance • Terpenoid aldehydes • Polyphenolics • Breeding stocks • Cultivars • Race stocks • Gossypium hirsutum L.

1 Cooperative investigation of the AR, SEA, USDA, and the Texas Agric. Exp. Stn., Texas A&M Univ., College Station, TX 77843.

2 Research geneticist and research chemist, AR, SEA, USDA, Brownsville, TX 78520, and College Station, TX 77840, respectively.

Received for publication August 1, 1980.




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Vadose Zone Journal
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1981 by the Crop Science Society of America.