Characterisation of progeny from backcrosses of triploid hybrids between Hordeum vulgare L. (2x) and H. bulbosum L. (4x) to H. vulgare

Interspecific hybridisations between Hordeum vulgare L. cultivated barley) and H. bulbosum L. (bulbous barley grass) have been carried out to transfer desirable traits, such as disease resistance, from the wild species into barley. In this paper we report the results of an extensive backcrossing pro...

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Bibliographic Details
Published in:Theoretical and applied genetics 1994-06, Vol.88 (3/4), p.460-464
Main Authors: Pickering, R.A, Timmerman, G.M, Cromey, M.G, Melz, G
Format: Article
Language:English
Subjects:
backcrossing
Biological and medical sciences
cell biology
chromosome substitution
chromosome translocation
Classical genetics, quantitative genetics, hybrids
Fundamental and applied biological sciences. Psychology
Genetics of eukaryotes. Biological and molecular evolution
Hordeum bulbosum
Hordeum vulgare
hybrids
interspecific hybridization
introgression
Pteridophyta, spermatophyta
restriction fragment length polymorphism
triploidy
Vegetals
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Summary:Interspecific hybridisations between Hordeum vulgare L. cultivated barley) and H. bulbosum L. (bulbous barley grass) have been carried out to transfer desirable traits, such as disease resistance, from the wild species into barley. In this paper we report the results of an extensive backcrossing programme of triploid hybrids (H. vulgare 2x X H. bulbosum 4x) to two cultivars of H. vulgare. Progenies were characterised cytologically and by restriction fragment length polymorphism analysis and comprised (1) haploid and diploid H. vulgare plants, (2) hybrids and aneuploids, (3) single and double monosomic substitutions of H. bulbosum chromosomes into H. vulgare and (4) chromosomal rearrangements and recombinants. Five out of the seven possible single monosomic chromosome substitutions have now been identified amongst backcross progeny and will be valuable for directed gene introgression and genome homoeology studies. The presence amongst progeny of 1 plant with an H. vulgare-H. bulbosum translocated chromosome and one recombinant indicates the value of fertile triploid hybrids for interspecific gene introgression.
ISSN:0040-5752
1432-2242
DOI:10.1007/BF00223661