Meiotic pairing in a trigeneric hybrid Triticum tauschii-Agropyron cristatum-Hordeum chilense
The chromosome affinity among the P genome from Agropyron and the D and H(ch) genomes of Triticum and Hordeum in the absence of the Ph system controlling homoeologous chromosome pairing provides information for breeding purposes. Hybrids between two accesions of the diploid barley Hordeum chilense (H(ch)H(ch)) and the fertile amphiploid Triticum tauschii-Agropyron cristatum (DDPP) were made, giving rise to the trigeneric hybrid genomic combinations H(ch)DP from which such information could be obtained. The meiotic pairing of these hybrids using fluorescence genomic in situ hybridization (FISH) on metaphase I pollen mother cells yield data on allosyndetic and autosyndetic chromosome pairing between the three genomes. The results showed that the A. cristatum tetraploid parent of the amphiploid DDPP is a segmental alloploid. A higher pairing between the D and H(ch) genomes than between them and the P genome from A. cristatum is observed.
| Main Authors: | , , |
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| Format: | artículo biblioteca |
| Language: | English |
| Published: |
Blackwell Publishing
1998-12
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| Online Access: | http://hdl.handle.net/10261/82972 |
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