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 9:624-627 (1969)
© 1969 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 Hunt, O. J.
Right arrow Articles by Jensen, H. J.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Hunt, O. J.
Right arrow Articles by Jensen, H. J.
Agricola
Right arrow Articles by Hunt, O. J.
Right arrow Articles by Jensen, H. J.

Development of Resistance to Root-Knot Nematode (Meloidogyne hapla Chitwood) in Alfalfa (Medicago sativa L.)1

O. J. Hunt2, R. N. Peaden2, L. R. Faulkner3, G. D. Griffin3 and H. J. Jensen3

Alfalfa (Medicago sativa L.) clones with dominant monogenic resistance to the Northern root-knot nematode (Meloidogyne hapla Chitwood) were used in a backcross breeding procedure to develop resistance in adapted plant materials. Recurrent parents were some of the parent clones of the cultivars ‘Washoe’ and ‘Lahontan’ with resistance to pea aphid, spotted alfalfa aphid, stem nematode and bacterial wilt.

Results of these studies indicated that it was relatively easy to transfer a high level of M. hapla resistance into otherwise adapted germ plasm while maintaining resistance to several other pests. Eighty percent of the triplex and quadruplex M. hapla resistant clones were resistant to spotted alfalfa aphids and pea aphids and 65% of the polycross progeny of these clones were resistant to stem nematodes.

Key Words: Backcross breeding • Stemnematode • Spotted alfalfa aphid • Pea aphid • Bacterial wilt

1 Contribution of the Crops Research Division, ARS, USDA, in cooperation with the Agricultural Experiment Stations of Nevada, Oregon, Utah, and Washington. Authorized for publication as paper no. 119 of the Nevada Agricultural Experiment Station.

2 Research Agronomists, Agricultural Research Service, Reno, Nev. 89507.

3 Associate Plant Pathologist, Washington State University, Prosser; Research Nematologist, ARS, Logan, Utah; and Professor of Nematology, Oregon State University, Corvallis, respectively. Part of a study initiated by H. L. Carnahan, Arnold-Thomas Seed Service, Fresno, Calif.; formerly Research Agronomist, ARS, Reno, Nev.

Received for publication March 8, 1969.




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 © 1969 by the Crop Science Society of America.