Monosomic and double monosomic substitutions of Hordeum bulbosum L. chromosomes into H. vulgare L

One of the aims of the interspecific crossing programme between Hordeum vulgare L. and H. bulbosum L. has been to introgress desirable genes into barley from the wild species. However, despite their close taxonomic relationship there have been few reports of achieving this objective using amphidiplo...

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Bibliographic Details
Published in:Theoretical and applied genetics 1992-07, Vol.84 (3-4), p.466-472
Main Author: Pickering, R.A. (Department of Scientific and Industrial Research, Christchurch (New Zealand))
Format: Article
Language:English
Subjects:
BANDEO DE CROMOSOMAS
BANDING CHROMOSOMIQUE
Biological and medical sciences
C-banding
CHROMOSOME BANDING
CHROMOSOME MANIPULATION
Chromosome substitutions
Cytogenetics
Fundamental and applied biological sciences. Psychology
Genetics of eukaryotes. Biological and molecular evolution
HIBRIDACION INTERESPECIFICA
HORDEUM BULBOSUM
Hordeum bulbosum L
HORDEUM VULGARE
Hordeum vulgare L
HYBRIDATION INTERSPECIFIQUE
INTERSPECIFIC HYBRIDIZATION
Interspecific hybrids
MANIPULACION DE CROMOSOMAS
MANIPULATION CHROMOSOMIQUE
Pteridophyta, spermatophyta
Vegetals and fungi
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Summary:One of the aims of the interspecific crossing programme between Hordeum vulgare L. and H. bulbosum L. has been to introgress desirable genes into barley from the wild species. However, despite their close taxonomic relationship there have been few reports of achieving this objective using amphidiploid hybrids. In order to broaden the range of available hybrids, partially fertile triploids between H. vulgare (2n = 2x = 14) and H. bulbosum (2n = 4x = 28) were developed and crossed with H. vulgare as female parent. From 580 progeny which were screened, eight putative single monosomic chromosome substitution lines and one double monosomic substitution were identified by cytological analysis. These involved the substitution of H. vulgare chromosome 1 (two lines), 6 (four lines), 6L (one line), 7 (one line) and 1 + 4 (one line) by their respective H. bulbosum homoeologues. The H. bulbosum chromosome was frequently eliminated during plant development, but it was observed regularly in pollen mother cells of two lines. However, pairing between the H. bulbosum chromosome and its H. vulgare homoeologue was low. Several of the lines were more resistant than their H. vulgare parents to powdery mildew (Erysiphe graminis DC. f.sp. hordei Em. Marchai), net blotch (Drechslera teres Sacc.) and scald (Rhynchosporium secalis (Oudem.) Davis). Apart from their use in studying genome relationships, their value to plant breeders will depend on the ease of inducing translocations between the parental chromosomes.
ISSN:0040-5752
1432-2242
DOI:10.1007/BF00229508