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


     

Published in Crop Sci 8:607-611 (1968)
© 1968 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 HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Dewey, D. R.
Right arrow Articles by Pendse, P. C.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Dewey, D. R.
Right arrow Articles by Pendse, P. C.
Agricola
Right arrow Articles by Dewey, D. R.
Right arrow Articles by Pendse, P. C.

Hybrids Between Agropyron desertorum and Induced-Tetraploid Agropyron cristatum1

Douglas R. Dewey and P. C. Pendse2

Cross-compatibility of Agropyron desertorum (Fisch. ex Link) Schult. and induced-tetraploid A. cristatum (L.) Gaertn. was variable, and seed set ranged from 0 to 20 hybrid seeds per spike. Many hybrids were exceptionally large and leafy and compared favorably with the most vigorous crested wheatgrasses. The A. desertorum, 2n=31, and induced-tetraploid A. cristatum, 2n=28, parents behaved cytologically as autoploids. The three extra A. desertorum chromosomes were believed to be supernumeraries. Chromosomes numbers of 42 hybrids ranged from 2n=28 to 2n=32. Chromosome associations in 28-chromosome hybrids averaged 0.02 I, 8.54 II, 0.02 III, 2.25 IV, 0.22 VI, and 0.06 VIII in 180 cells at diakinesis. Hexavalent and octavalent associations at diakinesis and bridge-fragment formations at anaphase I and II signified structural heterozygosity between A. cristatum and A. desertorum genomes. Seed set ranged trom 0.02 to 2.30 seeds per spikelet in 39 unselected hybrids and from 1.71 to 4.15 seeds per spikelet in 15 selected hybrids. The prospects of utilizing A. desertorum x induced-tetraploid A. cristatum hybrids in a breeding program appear favorable in spite of some parental cross-incompatibility and reduced fertility of some hybrids. Taxonomic implications of the data are discussed.

Key Words: breeding • colchicine • crested wheatgrass • cytology • cytotaxonomy • chromosome pairing

1 Cooperative investigations of the Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, and the Utah Agricultural Experiment Station, Logan, Utah 84321. Taken in part from the Ph.D. Thesis of the junior author. Approved as Journal paper No. 769, Utah Agr. Exp. Sta.

2 Research Geneticist, Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture; and Assistant Professor of Biology, California State Polytechnic College, San Luis Obispo, Calif. (formerly Graduate Assistant, Utah State University.)

Received for publication March 30, 1968.


This article has been cited by other articles:


Home page
 Crop Sci.Home page
K. B. Jensen, S. R. Larson, B. L. Waldron, and K. H. Asay
Cytogenetic and Molecular Characterization of Hybrids between 6x, 4x, and 2x Ploidy Levels in Crested Wheatgrass
Crop Sci., December 2, 2005; 46(1): 105 - 112.
[Abstract] [Full Text] [PDF]

Home page
 Crop Sci.Home page
K. B. Jensen, S. R. Larson, B. L. Waldron, and D. A. Johnson
Characterization of Hybrids from Induced x Natural Tetraploids of Russian Wildrye
Crop Sci., May 27, 2005; 45(4): 1305 - 1311.
[Abstract] [Full Text] [PDF]


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 © 1968 by the Crop Science Society of America.