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


     

Published in Crop Sci 11:854-855 (1971)
© 1971 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 Devine, T. E.
Right arrow Articles by Campbell, T. A.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Devine, T. E.
Right arrow Articles by Campbell, T. A.
Agricola
Right arrow Articles by Devine, T. E.
Right arrow Articles by Campbell, T. A.

Selection for Resistance to Anthracnose (Colletotrichum trifolii) in Four Alfalfa Populations1

T. E. Devine, C. H. Hanson, S. A. Ostazeski and T. A. Campbell2

Three cultivars and one experimental population of alfalfa (Medicago saliva L.) were subjected to three cycles of recurrent phenotypic selection in the laboratory and greenhouse for resistance to anthracnose, caused by Colletotrichum trifolii Bain and Essary. The frequency of highly resistant plants in the cultivars ‘Glacier,‘ ‘Saranac,’ and ‘Vernal’ increased from 5, 5, and 1% to 82, 72, and 59%, respectively. The frequency of highly resistant plants in the experimental population MSHp6F, which had a higher initial level of resistance, increased from 20 to 88%. Highly resistant plants were characterized by the absence of lesions and acervuli. Rapid progress in selection and the bimodal distribution of the MSHp6F population series suggested that resistance in this population may be controlled by a single dominant gene. The distribution and selection progress in Vernal suggested a more complex mechanism for conferring resistance in this population.

Key Words: Recurrent phenotypic selection • Mass selection • Dry inoculum • Persistence

1 Contribution from the Plant Science Research Division, Agricultural Research Service, US Department of Agriculture, Beltsville, Md. 20705. The authors thank Dr. H. Shimanuki, Entomology Research Division, Agricultural Research Service, US Department of Agriculture, Beltsville, Md., for providing honeybees used for intercrossing plants in the greenhouse.

2 Research Geneticist, Research Agronomist, Research Plant Pathologist, and Agronomist (Research Assistant), respectively.

Received for publication April 8, 1971.




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Vadose Zone Journal
Journal of Plant Registrations Soil Science Society of America Journal
Journal of Natural Resources
and Life Sciences Education		 Journal of
Environmental Quality
Copyright © 1971 by the Crop Science Society of America.