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 23:1069-1074 (1983)
© 1983 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 Gardner, M. E. B.
Right arrow Articles by Stalker, H. T.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Gardner, M. E. B.
Right arrow Articles by Stalker, H. T.
Agricola
Right arrow Articles by Gardner, M. E. B.
Right arrow Articles by Stalker, H. T.

Cytology and Leafspot Resistance of Section Arachis Amphidiploids and their Hybrids with Arachis Hypogaea1

M. E. B. Gardner and H. T. Stalker2

Improvement of the cultivated peanut, Arachis hypogaea L., by utilizing the germplasm resources found in related members of the genus is complicated by differences in genomic relationships and ploidy levels. To circumvent sterility in interspecific hybrids due to ploidy differences, amphidiploids representing 23 hybrid combinations of six section Arachis nom. nud. species were produced. Most amphidiploids had regular meiosis and produced stainable pollen, but produced few, if any, seeds. Four of five attempted hybrids between A. hypogaea cv. NC 6 and early leafspot (Cercospora arachidicola Hori) resistant amphidiploids were successful. All 59 plants produced were vigorous and flowered profusely, but only two genotypes produced seed, and in a very limited number. The diploid species, F1 hybrids, amphidiploids, and NC 6 x amphidiploid hybrids were resistant to early leafspot in field evaluations. After self-pollination, F2 progenies of the NC 6 x amphidiploid hybrids segregated for growth habit and fertility. Several plants of the hybrid NC 6 x 4x(A. stenosperma Greg. et Greg. nom. nud. x A. chacoense Krap. et Greg. nom. nud.) produced numerous seeds, and initial sterility barriers which restricted utilization of germplasm within Arachis have been overcome for some species.

Key Words: Peanut • Cercospora arachidicola • Interspecific hybrids

1 Paper no. 8731 of the Journal Series of the North Carolina Agric. Res. Serv., Raleigh, NC 27650. The investigation was supported by SEA-CR grant no. 79-59-2371-1-1-367-1.

2 Former graduate assistant and associate professor, respectively, Dep. of Crop Science, North Carolina State Univ., Raleigh, NC 27650.

Received for publication March 7, 1983.




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 © 1983 by the Crop Science Society of America.