GrainGenes Reference Report: CGR-150-139
Reference
CGR-150-139
Title
The Effect of Homoeologous Meiotic Pairing in Tetraploid Hordeum bulbosum L. H. vulgare L. Hybrids on Alien Introgressions in Offspring.
Journal
Cytogenetic and Genome Research
Year
2016
Volume
150
Pages
139-149
Author
Scholz M Pendinen G
Abstract
The pairing behaviour of the individual chromosome arms of Hordeum vulgare (Hv) with their homoeologous arms of H. bulbosum (Hb) at metaphase I of meiosis in tetraploid Hb Hv hybrids and the frequencies of recombined Hv chromosome arms in selfed offspring were studied on differentially visualized chromosomes after fluorescent in situ hybridisation. The frequencies of paired Hv-Hb arms in the F2 and F3 hybrids were correlated with the frequencies of recombined Hv chromosomes in progenies. Self-generation of hybrids, the number of Hv and Hb chromosomes, and the number of recombined Hv chromosomes of the hybrids strongly influenced the Hv-Hb pairing frequency in meiosis. Within the offspring of F2 and F3 hybrids both Hv plants and hybrids were detected. In contrast, all progenies of the F4 hybrid were hybrids which exhibited centromere misdivisions. The highest frequencies of homoeologous pairing in hybrids and most recombinants were obtained for the barley chromosome 1HL. Recombinants for 4HL, 5HS, 6HS, and 7HS were rarely found. Meiotic pairing and recombinants involving chromosome 1HS were never observed. The results of this study demonstrate that fertile tetraploid interspecific hybrids with a high intergenomic pairing at meiosis are valuable basic material for introgression breeding in barley.
External Databases
PubMed: 28110339
GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: CGR-150-139
|
| |||
|
| |||
|
| |||
|
| |||
|
| |||
|
| |||
|
| |||
|
| |||
|
|
GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||