A study of genomic relationships of Agropyron trachycaulum with Elymus scabriglumis, E. innovatus and Hordeum procerum

Gupta, P. K. ; Balyan, H. S. ; Fedak, George (1988) A study of genomic relationships of Agropyron trachycaulum with Elymus scabriglumis, E. innovatus and Hordeum procerum Genome, 30 (4). pp. 525-528. ISSN 0831-2796

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Official URL: http://www.nrcresearchpress.com/doi/abs/10.1139/g8...

Related URL: http://dx.doi.org/10.1139/g88-088

Abstract

Synthetic hybrids of Agropyron trachycaulum (2n=4x=28) with Elymus scabriglumis (2n=6x=42), E. innovatus (2n=4x=28), and Hordeum procerum (2n = 6x = 42) were produced through the embryo rescue technique, at relative frequencies of 7.1, 4.2, and 1.8%, respectively, of pollinated florets. The mean chromosome associations in two hybrids with E. scabriglumis was 11.71II + 1.47III + 0.15IV (mean chiasma frequency = 22.75), in one hybrid with H. procerum was 7.27II + 0.63III + 0.09IV (mean chiasma frequency = 10.20) and in a hybrid with E. innovatus was 2.8II (2.19 chiasma frequency). The data suggested two common genomes (S and H) with E. scabriglumis, one common genome (H) with H. procerum, and no common genome with E. innovatus. The evidence obtained suggested a SSHHYY genomic constitution for E. scabriglumis and two genomes different from SH for E. innovatus. The evidence also suggested that in H. procerum there may not be two related genomes present (derived from H. jubatum) as speculated in some earlier studies.

Item Type:Article
Source:Copyright of this article belongs to NRC Research Press.
Keywords:Intergeneric Hybrids; Agropyron; Elymus; Hordeum; Chromosome Pairing
ID Code:74960
Deposited On:19 Dec 2011 05:42
Last Modified:19 Dec 2011 05:42

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