Introgression of Allium fistulosum L. into Allium cepa L.: cytogenetic evidence.
A diploid Allium cepa plant was recovered from the backcross of an interspecific triploid (2 x A. cepa + 1 x A. fistulosum) to an A. cepa diploid which exhibited both A. cepa and A. fistulosum Adh-1 alleles. Cytogenetic analyses revealed a recombinant sub-telocentric chromosome. The ADH-1 locus is believed to be on the long arm of the sub-telocentric A. fistulosum chromosome 5. Meiosis of the triploid progenitor gives strong evidence that recombination occurred. A. fistulosum chromosome 8 has been substituted for A. cepa chromosome 1.
Agronomy, Horticulture, and Entomology Department, Texas Tech University, 79409-4169, Lubbock, TX, USA.
E B
EB
Peffley
P D
PD
Mangum