HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Wang, R. R-C. Search for Related Content PubMed Articles by Wang, R. R-C. Agricola Articles by Wang, R. R-C.

Diploid Perennial Intergeneric Hybrids in the Tribe Triticeae. I. Agropyron cristatum x Pseudoroegneria libanotica and Critesion violaceum x Psathyrostachys juncea¹

Twelve Agropyron cristatum (L.) Gaertner (2n=14; PP) x Pseudoroegneria libanotica (Hack.) D. R. Dewey (2n=14; SS) brids and nine Critesion violaceum (Boiss. & Hohen.) A. Löve (2n=14; H^VH^V) x Psathyrostachys juncea (Fisch.) Nevski (2n=14; NN) hybrids were produced to synthesize new genome combinations for production of amphiploids. These hybrids were obtained by controlled pollination and embryo culture on orchid agar medium. Spikes of these two diploid intergeneric hybrids were intermediate to those of their respective parents. The A. cristatum x P. libanotica hybrids (2n=14; PS) averaged 7.71^I, 2.77^II, 0.22^III, 0.01^IV, and 0.01^V per cell at metaphase I, 3.06 laggards per cell at anaphase I, and 3.35 micronuclei per quartet. Chromosome pairings were mainly allosyndetic between the Pgenome (large) and the S-genome (small) chromosomes. Hybrid plants of C. violaceum x P. juncea (2n=14; H^VN) averaged 12.18^I, 0.79^II, and 0.01^III per cell at metaphase I, 3.12 laggards per cell at anaphase I, and 1.30 micronuclei per quartet. Neither hybrid combination produced stainable pollen grains. Meiotic pairing in these hybridsuggests that the relationship between the P and S genomes is closer than that between the H^V; and N genomes.

Key Words: Crested wheatgrass • Russian wildrye • Meiosis • Genome • Chromosome pairing

² Research geneticist, USDA-ARS, Crops Research Laboratory, Utah State Univ., UMC 63, Logan, UT 84322.

Received for publication March 15, 1985.