Crop Science Journal of Natural Resources and Life Sciences Education
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published in Crop Sci 17:769-772 (1977)
© 1977 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 Turner, J. H.
Right arrow Articles by Ramey, H. H.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Turner, J. H.
Right arrow Articles by Ramey, H. H.
Agricola
Right arrow Articles by Turner, J. H.
Right arrow Articles by Ramey, H. H.

Seed Setting Efficiency in Eight Cultivars of Upland Cotton1

John H. Turner, J. McD. Stewart, P. E. Hoskinson and H. H. Ramey2

Seed setting efficiency was determined for six cultivars of Upland cotton (Gossypium hirsutum L.) in 1974 and eight cultivars in 1975 at Jackson, Tenn. The number of ovules per ovary was determined by examining blooms at weekly periods. Simultaneously tagged blooms provided identifiable bolls from each bloom period to determine the number of seeds per boll. Seed setting efficiency (S.S.E.) was calculated from: (seeds/boll ÷ ovules/ovary) in percent

Cultivars differed in ovules/ovary, seeds/boll, and S.S.E. both years. The influence of bloom periods, although significant for ovules/ovary both years, was less than cultivar influence. S.S.E. was also influenced by bloom period in 1974, with lower efficiency at the late bloom period. Cultivar x period interactions were detected for ovules/ovary and seeds/boll in 1974 and for ovules/ovary in 1975.

The combined analysis with six of the cultivars show that cultivars influenced ovules/ovary and seeds/boll far more than years or period of bloom. Year x cultivar and year x period interactions obscured the main effects upon seed setting efficiency.

Key Words: Ovules/ovary • Seeds/boll • Motes • Breeding centers • Gossypium hirsutum L

1 Cotton Quality Laboratories, ARS, USDA, and Inst. of Agriculture, Univ. of Tennessee.

2 Research agronomist, plant physiologist, ARS, USDA, Univ. of Tennessee, Knoxville, TN 37916; associate professor, Dep. of Plant and Soil Science, Univ. of Tennessee, Jackson, TN 38301; and research geneticist, ARS, USDA, Univ. of Tennessee, Knoxville, TN 37916.

Received for publication September 7, 1976.




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 © 1977 by the Crop Science Society of America.