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Chromosome elimination and chromosome pairing in tetraploid hybrids ofHordeum vulgare×H. bulbosum

✍ Scribed by H. M. Thomas

Publisher: Springer
Year: 1988
Tongue: English
Weight: 1008 KB
Volume: 76
Category: Article
ISSN: 0040-5752
DOI: 10.1007/bf00288841

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✦ Synopsis

The C0 tetraploid counterparts of diploid hybrids of Hordeum vulgare × H. bulbosum were meiotically analysed, and were found to be chromosomally less stable than the same genotypes had been as diploids. The 14 bulbosum chromosomes present in the tetraploid cytotypes were probably eliminated as pairs rather than randomly or one genome at the time. Development of the vulgare and bulbosum genomes was asynchronous in some hybrids, the bulbosum chromosomes appearing less advanced than the vulgare chromosomes in the same cell. This appeared to reduce pairing between bulbosum homologues and also suppressed homoeologous pairing.

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