ISSN:
1432-2242
Keywords:
Key words Introgression
;
Interspecific hybridization
;
Isozymes
;
Japanese bunching onion
;
Male sterility
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Allium fistulosum possesses a number of traits which would be desirable in A. cepa. Thus far, no commercial A. cepa cultivars have been released which harbor Allium fistulosum traits. F1BC3 populations were generated for this study by backcrossing A. cepa to A. cepa×A. fistulosum hybrids. The F1BC3 plants were evaluated for plant morphology, floral characters, male- sterile cytoplasm, soluble solids and pungency, and isozymes. Overall growth habit and floral characters of the F1BC3 plants were much like A. cepa. We report here the recovery of recombinant, bulbing, and fertile A. cepa-type onions that exhibit A. fistulosum isozyme alleles and morphological markers. Recombination between A. cepa and A. fistulosum genomes was achieved using the introgression strategy of backcrossing A. fistulosum into A. cepa, thereby ameliorating the nuclear cytoplasmic barriers that occurred in previous less successful introgression attempts when plants were not in A. cepa cytoplasm. We believe this report to be the first demonstration of onion introgressants that are like A. cepa in appearance, are male- and female-fertile, and possess A. fistulosum genes.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s001220050069
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