Chromosomal locations of glutamate oxaloacetate transaminase gene loci in Japanese bunching onion (Allium fistulosum L.) and shallot (A. cepa L. Aggregatum group)

Abstract

The chromosomal locations of glutamate oxaloacetate transaminase gene loci in Japanese bunching onion (Allium fistulosum L., 2n=2X= 16, FF) and shallot (A. cepa L. Aggregatum group, 2n=2X = l6, AA) were investigated using alien monosomic addition lines (2n=2X+1=17, FF+nA, AA+nF) and hypoallotriploid lines (2n=3X-1=23, AFF-nA, AAF-nF) between these two species. The gene locus Got-2 was located on the homoeologous sub-telocentric chromosomes, 6F in A. fistulosum and 6A in A. cepa Aggregatum group. The gene locus Got-1 was on the other chromosomes. The present results indicate that chromosomal locations of these gene loci, at least Got-2, were conservative both in A. fistulosum and A. cepa Aggregatum group during speciation and subsequent evolution.